Optical Materials最新文献_第4页

Influence of dysprosium incorporation strategies on borotellurite glass properties for white light emission 镝掺入策略对硼碲玻璃白光发射性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117879

E.C. Cardillo , S. Terny , M.A. Frechero

Two series of dysprosium borotellurite glasses, with the base composition (0.4Li₂O 0.4MgO)0.2Bi₂O₃(1.4B₂O₃ 0.6TeO₂), are synthesized. Two incorporation strategies are explored: substituting Bi₂O₃ or the glass network itself. Comprehensive characterization using X-Ray Diffraction (XRD) confirms the amorphous nature of the glasses, while Differential Thermal Analysis (DTA) demonstrates their thermal stability and glass transition temperature (T_g). Fourier-transform infrared (FTIR) spectroscopy identifies the presence of BO₃, BO₄, TeO₃, and TeO₄ units, providing insights into the glass structure. Optical analysis using the Tauc and DASF methods confirms the allowed direct inter-band electronic transitions in the glasses. Photoluminescence analyses reveal characteristic Dy³⁺ emission peaks in the blue and yellow regions. It is observed that photoluminescence intensity increases with Dy³⁺ concentration in the bismuth-substituted series (BixDy), but remains constant in the network-substituted series (BTxDy). This stable PL output in the BTxDy series demonstrates that the host network effectively inhibits Dy³⁺ micro-clustering, thereby suppressing concentration quenching mechanisms even at high concentrations. Finally, Judd-Ofelt analysis and CIE chromaticity coordinates confirm that all glasses emit cold white light, positioning them as promising materials for white light-emitting diodes (WLEDs).

合成了基料组成为（0.4Li2O 0.4MgO）0.2Bi2O3（1.4B2O3 0.6TeO2）的两个系列硼碲酸镝玻璃。探索了两种结合策略：取代Bi2O3或玻璃网络本身。x射线衍射（XRD）证实了玻璃的非晶态性质，差热分析（DTA）证实了玻璃的热稳定性和玻璃化转变温度（Tg）。傅里叶变换红外光谱（FTIR）鉴定了BO3， BO4， TeO3和TeO4单元的存在，为玻璃结构提供了深入了解。使用tac和DASF方法的光学分析证实了玻璃中允许的直接带间电子跃迁。光致发光分析显示在蓝色和黄色区域有特征的Dy3+发射峰。在铋取代系（BixDy）中，光致发光强度随着Dy3+浓度的增加而增加，而在网络取代系（BTxDy）中，光致发光强度保持不变。BTxDy系列中稳定的PL输出表明，宿主网络有效抑制Dy3+微聚簇，从而即使在高浓度下也能抑制浓度猝灭机制。最后，Judd-Ofelt分析和CIE色度坐标证实，所有的玻璃都发出冷白光，将它们定位为白光发光二极管（wled）的有前途的材料。

{"title":"Influence of dysprosium incorporation strategies on borotellurite glass properties for white light emission","authors":"E.C. Cardillo , S. Terny , M.A. Frechero","doi":"10.1016/j.optmat.2026.117879","DOIUrl":"10.1016/j.optmat.2026.117879","url":null,"abstract":"<div><div>Two series of dysprosium borotellurite glasses, with the base composition (0.4Li2O 0.4MgO)0.2Bi2O3(1.4B2O3 0.6TeO2), are synthesized. Two incorporation strategies are explored: substituting Bi2O3 or the glass network itself. Comprehensive characterization using X-Ray Diffraction (XRD) confirms the amorphous nature of the glasses, while Differential Thermal Analysis (DTA) demonstrates their thermal stability and glass transition temperature (Tg). Fourier-transform infrared (FTIR) spectroscopy identifies the presence of BO3, BO4, TeO3, and TeO4 units, providing insights into the glass structure. Optical analysis using the Tauc and DASF methods confirms the allowed direct inter-band electronic transitions in the glasses. Photoluminescence analyses reveal characteristic Dy3+ emission peaks in the blue and yellow regions. It is observed that photoluminescence intensity increases with Dy3+ concentration in the bismuth-substituted series (BixDy), but remains constant in the network-substituted series (BTxDy). This stable PL output in the BTxDy series demonstrates that the host network effectively inhibits Dy3+ micro-clustering, thereby suppressing concentration quenching mechanisms even at high concentrations. Finally, Judd-Ofelt analysis and CIE chromaticity coordinates confirm that all glasses emit cold white light, positioning them as promising materials for white light-emitting diodes (WLEDs).</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117879"},"PeriodicalIF":4.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surfactant-free hydrothermal synthesis of 0D/1D Bi2Sn2O7/Bi2O4 S-scheme heterojunction for efficient TC degradation in visible light 无表面活性剂水热合成0D/1D Bi2Sn2O7/Bi2O4 S-scheme异质结在可见光下高效降解TC

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117875

Bingge Chen , Hongxia Jing , Gaoyan Liang , Jingqi Jia , Wangjun Pei

Tetracycline (TC) abuse has caused severe aquatic pollution, and developing green and efficient photocatalytic technologies provides a viable solution. In this work, a newly designed Bi₂Sn₂O₇/Bi₂O₄ composite featuring an S-scheme charge transfer pathway was prepared through a surfactant-free hydrothermal route. During this process, the introduction of Bi₂O₄ rods disrupted the original agglomerated structure of Bi₂Sn₂O₇, facilitating the decoration of Bi₂Sn₂O₇ nanoparticles onto the rods, thus forming a well-dispersed 0D/1D nanocomposite. This unique structure enhances the overall specific surface area (66.16 m²) and enriches the mesoporous architecture, improving tetracycline capture and establishing a hole-dominated S-scheme charge transfer mechanism between the heterojunction. The composite material demonstrated excellent performance in tetracycline degradation, achieving 86.5 % efficiency within 60 min under visible light. The presence of a narrower bandgap and reduced electron migration resistance is confirmed by the visible light absorption edge of the composite material at 660 nm and its enhanced photocurrent response density. Additionally, this material offers significant advantages in scalable synthesis, providing a novel approach for constructing photocatalytic composites for tetracycline removal in water environment remediation.

四环素的滥用造成了严重的水生污染，开发绿色高效的光催化技术提供了可行的解决方案。本文通过无表面活性剂的水热途径制备了具有S-scheme电荷转移途径的Bi2Sn2O7/Bi2O4复合材料。在此过程中，Bi2O4棒的引入破坏了Bi2Sn2O7原有的团聚结构，促进了Bi2Sn2O7纳米颗粒在棒上的修饰，从而形成了分散良好的0D/1D纳米复合材料。这种独特的结构提高了总比表面积（66.16 m2），丰富了介孔结构，改善了四环素捕获，并在异质结之间建立了以空穴为主的S-scheme电荷转移机制。该复合材料对四环素具有良好的降解性能，在可见光下60 min降解效率达到86.5%。该复合材料660 nm处的可见光吸收边缘和光电流响应密度的增强证实了该复合材料的禁带变窄和电子迁移阻力的降低。此外，该材料在可扩展合成方面具有显著的优势，为构建用于水环境修复中四环素去除的光催化复合材料提供了一种新的方法。

{"title":"Surfactant-free hydrothermal synthesis of 0D/1D Bi2Sn2O7/Bi2O4 S-scheme heterojunction for efficient TC degradation in visible light","authors":"Bingge Chen , Hongxia Jing , Gaoyan Liang , Jingqi Jia , Wangjun Pei","doi":"10.1016/j.optmat.2026.117875","DOIUrl":"10.1016/j.optmat.2026.117875","url":null,"abstract":"<div><div>Tetracycline (TC) abuse has caused severe aquatic pollution, and developing green and efficient photocatalytic technologies provides a viable solution. In this work, a newly designed Bi2Sn2O7/Bi2O4 composite featuring an S-scheme charge transfer pathway was prepared through a surfactant-free hydrothermal route. During this process, the introduction of Bi2O4 rods disrupted the original agglomerated structure of Bi2Sn2O7, facilitating the decoration of Bi2Sn2O7 nanoparticles onto the rods, thus forming a well-dispersed 0D/1D nanocomposite. This unique structure enhances the overall specific surface area (66.16 m2) and enriches the mesoporous architecture, improving tetracycline capture and establishing a hole-dominated S-scheme charge transfer mechanism between the heterojunction. The composite material demonstrated excellent performance in tetracycline degradation, achieving 86.5 % efficiency within 60 min under visible light. The presence of a narrower bandgap and reduced electron migration resistance is confirmed by the visible light absorption edge of the composite material at 660 nm and its enhanced photocurrent response density. Additionally, this material offers significant advantages in scalable synthesis, providing a novel approach for constructing photocatalytic composites for tetracycline removal in water environment remediation.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117875"},"PeriodicalIF":4.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unsymmetrical squaraine dyes with tailored substituents for high-efficiency far-red DSSCs 具有定制取代基的非对称方胺染料用于高效远红色DSSCs

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117860

J. Alkabli

The advancement of dye-sensitized solar cells (DSSCs) depends on rational molecular engineering of organic sensitizers with optimized optoelectronic properties. In this study, two novel unsymmetrical squaraine dyes, SQI-OCH₃ and SQI-CN, incorporating electron-donating (–OCH₃) and electron-withdrawing (–CN) substituents, respectively, were synthesized and structurally characterized using ¹H/¹³CNMR and mass spectrometry. Their optical and electrochemical behaviors were examined through UV–vis spectroscopy, cyclic voltammetry, and density functional theory (DFT) calculations. Both dyes exhibited intense far-red absorption (λ_max = 642 and 638 nm) with high molar extinction coefficients (1.94 × 10⁵ and 2.13 × 10⁵ M⁻¹ cm⁻¹) and narrow optical band gaps (1.89 and 1.98 eV). Electrochemical and theoretical analyses revealed well-aligned HOMO/LUMO levels (−5.07/–3.15 eV for SQI-OCH₃ and –5.03/–3.10 eV for SQI-CN) relative to TiO₂ and the I⁻/I₃⁻ redox potential, ensuring favorable charge injection and regeneration. DSSCs based on SQI-OCH₃ achieved higher efficiency (Jsc = 14.52 mA cm⁻², Voc = 0.721 V, FF = 0.695, PCE = 7.29 %) than SQI-CN (6.46 %). Co-adsorption with chenodeoxycholic acid (CDCA) reduced aggregation and enhanced IPCE (up to 80 %). These findings elucidate the structure–property relationships governing squaraine performance and guide future molecular design for efficient far-red DSSCs.

染料敏化太阳能电池（DSSCs）的发展取决于有机敏化剂的合理分子工程和优化的光电性能。本研究合成了两种新型不对称方碱染料SQI-OCH3和SQI-CN，它们分别含有供电子取代基（-OCH3）和吸电子取代基（-CN），并利用1H/13CNMR和质谱对其进行了结构表征。通过紫外可见光谱、循环伏安法和密度泛函理论（DFT）计算研究了它们的光学和电化学行为。两种染料均具有较强的远红吸收（λmax分别为642和638 nm）、较高的摩尔消光系数（1.94 × 105和2.13 × 105 M−1 cm−1）和较窄的带隙（1.89和1.98 eV）。电化学和理论分析表明，相对于TiO2的HOMO/LUMO水平（SQI-OCH3为- 5.07/ -3.15 eV， SQI-CN为-5.03 / -3.10 eV）和I- /I3 -氧化还原电位排列良好，确保了有利的电荷注入和再生。基于SQI-OCH3的DSSCs的效率（Jsc = 14.52 mA cm−2,Voc = 0.721 V, FF = 0.695, PCE = 7.29%）高于SQI-CN（6.46%）。与鹅去氧胆酸（CDCA）共吸附可减少聚合并增强IPCE（高达80%）。这些发现阐明了控制方氨酸性能的结构-性质关系，并指导了未来高效远红色DSSCs的分子设计。

{"title":"Unsymmetrical squaraine dyes with tailored substituents for high-efficiency far-red DSSCs","authors":"J. Alkabli","doi":"10.1016/j.optmat.2026.117860","DOIUrl":"10.1016/j.optmat.2026.117860","url":null,"abstract":"<div><div>The advancement of dye-sensitized solar cells (DSSCs) depends on rational molecular engineering of organic sensitizers with optimized optoelectronic properties. In this study, two novel unsymmetrical squaraine dyes, SQI-OCH3 and SQI-CN, incorporating electron-donating (–OCH3) and electron-withdrawing (–CN) substituents, respectively, were synthesized and structurally characterized using 1H/13CNMR and mass spectrometry. Their optical and electrochemical behaviors were examined through UV–vis spectroscopy, cyclic voltammetry, and density functional theory (DFT) calculations. Both dyes exhibited intense far-red absorption (λmax = 642 and 638 nm) with high molar extinction coefficients (1.94 × 105 and 2.13 × 105 M−1 cm−1) and narrow optical band gaps (1.89 and 1.98 eV). Electrochemical and theoretical analyses revealed well-aligned HOMO/LUMO levels (−5.07/–3.15 eV for SQI-OCH3 and –5.03/–3.10 eV for SQI-CN) relative to TiO2 and the I−/I3− redox potential, ensuring favorable charge injection and regeneration. DSSCs based on SQI-OCH3 achieved higher efficiency (Jsc = 14.52 mA cm−2, Voc = 0.721 V, FF = 0.695, PCE = 7.29 %) than SQI-CN (6.46 %). Co-adsorption with chenodeoxycholic acid (CDCA) reduced aggregation and enhanced IPCE (up to 80 %). These findings elucidate the structure–property relationships governing squaraine performance and guide future molecular design for efficient far-red DSSCs.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117860"},"PeriodicalIF":4.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional additive engineering with methyl 2-aminobenzoate for high-performance perovskite solar cells 高性能钙钛矿太阳能电池用2-氨基苯甲酸甲酯多功能添加剂工程

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117876

Kaiyuan Gou, Jin Huang, Huiya Cao, Siyu Chong, Yufan Zhou, Shuya Ning

Defects in perovskite solar cells (PSCs) critically hinder both device stability and power conversion efficiency (PCE). Incorporating multifunctional organic additives into the perovskite precursor offers a promising approach to overcome these limitations. Here, we report methyl 2-aminobenzoate (MA) as a novel multifunctional additive containing –COOCH₃, –NH₂ groups, and a benzene ring. The benzene ring enhances hydrophobicity, while the ester (–COOCH₃) functional group, through its carbonyl oxygen and the –NH₂ group, coordinates with undercoordinated Pb²⁺ ions, thereby effectively passivating Pb-related defects. Consequently, MA-modified PSCs deliver a PCE of 16.85 %, markedly higher than the 14.09 % achieved by the control devices. Moreover, the optimized devices retained 88 % of their initial efficiency after 700 h of continuous illumination at 25 °C under ambient air, underscoring their excellent long-term operational stability.

钙钛矿太阳能电池（PSCs）中的缺陷严重影响了器件的稳定性和功率转换效率（PCE）。在钙钛矿前驱体中加入多功能有机添加剂为克服这些限制提供了一种很有前途的方法。在这里，我们报道了2-氨基苯甲酸甲酯（MA）是一种新型的多功能添加剂，含有-COOCH3， -NH2基团和苯环。苯环增强了疏水性，而酯（-COOCH3）官能团通过羰基氧和-NH2基团与欠配位的Pb2+离子配位，从而有效地钝化了铅相关缺陷。因此，ma修饰的PSCs提供16.85%的PCE，显著高于控制装置达到的14.09%。此外，优化后的器件在环境空气中25°C连续照明700小时后仍保持了88%的初始效率，强调了其出色的长期运行稳定性。

引用次数: 0

Sunlight-driven detoxification of tetracycline antibiotic and reactive red azo dye by hydrothermally grown CdS/Fe2O3 heterojunction photocatalyst 水热生长CdS/Fe2O3异质结光催化剂对四环素抗生素和活性红偶氮染料的脱毒作用

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117887

Khemika Wannakan , Sattra Nonthing , Tammanoon Chankhanittha , Authit Phakkhawan , Pawinee Klangtakai , Supinya Nijpanich , Narong Chanlek , Suwat Nanan

The creation of sunlight-responsive photocatalyst for decontamination of the detrimental contaminants in water is an optimistic direction in the field of environmental remediation. Herein, a visible-light-driven CdS/Fe₂O₃ heterojunction was fabricated by a hydrothermal route. The co-existence of hexagonal CdS and rhombohedral Fe₂O₃ was confirmed. Interestingly, the photoluminescence intensity obtained from the CdS/Fe₂O₃ is lower than those of the bare CdS and the pristine Fe₂O₃, implying a higher effective charge separation capacity, which in turn leads to a greater photocatalytic performance. The CdS/Fe₂O₃ heterojunction was applied for detoxification of reactive red 141 (RR141) dye and tetracycline (TC) antibiotic. The enhanced degradation of 100 % and 99 % was found toward detoxification of RR141 and TC, respectively. The photocatalytic detoxification of the contaminants correlates well with the first-order kinetics expressing the rate constants of 0.0548 min⁻¹ (RR141) and 0.0452 min⁻¹ (TC). The crystal phase of the used photocatalyst remained the same, compared to the fresh photocatalyst, indicating good structural stability. The binary heterostructure still maintained a promising photoactivity after five cycles. The ⋅OH radicals play a main role in decontamination of TC drug. The synthesized CdS/Fe₂O₃ heterojunction is the promising material for the treatment of wastewater comprising highly harmful pollutants including dyes and antibiotics.

开发光催化剂对水中有害污染物进行去污是环境修复领域的一个乐观方向。本文采用水热法制备了可见光驱动的CdS/Fe2O3异质结。证实了六边形CdS和菱形Fe2O3的共存。有趣的是，从CdS/Fe2O3获得的光致发光强度低于裸CdS和原始Fe2O3，这意味着更高的有效电荷分离能力，从而导致更好的光催化性能。将CdS/Fe2O3异质结应用于活性红141 （RR141）染料和四环素（TC）抗生素的脱毒。对RR141和TC的解毒降解率分别提高了100%和99%。污染物的光催化解毒与一级动力学密切相关，速率常数分别为0.0548 min−1 （RR141）和0.0452 min−1 （TC）。与新鲜光催化剂相比，使用的光催化剂的晶相保持不变，表明具有良好的结构稳定性。经过5个循环后，二元异质结构仍保持良好的光活性。⋅OH自由基在TC药物去污过程中起主要作用。合成的CdS/Fe2O3异质结是处理含有染料和抗生素等高有害污染物的废水的有前途的材料。

{"title":"Sunlight-driven detoxification of tetracycline antibiotic and reactive red azo dye by hydrothermally grown CdS/Fe2O3 heterojunction photocatalyst","authors":"Khemika Wannakan , Sattra Nonthing , Tammanoon Chankhanittha , Authit Phakkhawan , Pawinee Klangtakai , Supinya Nijpanich , Narong Chanlek , Suwat Nanan","doi":"10.1016/j.optmat.2026.117887","DOIUrl":"10.1016/j.optmat.2026.117887","url":null,"abstract":"<div><div>The creation of sunlight-responsive photocatalyst for decontamination of the detrimental contaminants in water is an optimistic direction in the field of environmental remediation. Herein, a visible-light-driven CdS/Fe2O3 heterojunction was fabricated by a hydrothermal route. The co-existence of hexagonal CdS and rhombohedral Fe2O3 was confirmed. Interestingly, the photoluminescence intensity obtained from the CdS/Fe2O3 is lower than those of the bare CdS and the pristine Fe2O3, implying a higher effective charge separation capacity, which in turn leads to a greater photocatalytic performance. The CdS/Fe2O3 heterojunction was applied for detoxification of reactive red 141 (RR141) dye and tetracycline (TC) antibiotic. The enhanced degradation of 100 % and 99 % was found toward detoxification of RR141 and TC, respectively. The photocatalytic detoxification of the contaminants correlates well with the first-order kinetics expressing the rate constants of 0.0548 min−1 (RR141) and 0.0452 min−1 (TC). The crystal phase of the used photocatalyst remained the same, compared to the fresh photocatalyst, indicating good structural stability. The binary heterostructure still maintained a promising photoactivity after five cycles. The ⋅OH radicals play a main role in decontamination of TC drug. The synthesized CdS/Fe2O3 heterojunction is the promising material for the treatment of wastewater comprising highly harmful pollutants including dyes and antibiotics.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117887"},"PeriodicalIF":4.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solvent-orchestrated intramolecular exciton reordering and π–π∗ transition engineering in tannin matrices: A comprehensive spectro-electrochemical mapping of Terminalia-based chromophores 单宁基质中溶剂调控的分子内激子重排序和π -π *跃迁工程：终端基发色团的全面光谱电化学作图

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-13 DOI: 10.1016/j.optmat.2026.117872

R. Chaithra, A.P. Nagendra Babu, D. Harshitha, C.G. Renuka

This study examines Terminalia catappa leaf biomolecular chromophore system antioxidant, optoelectronic, and electrochemical properties. These leaves are rich in π-conjugated polyphenols. Deionised water, methanol, and dimethylformamide (DMF) extraction focused on solute-solvent interactions, yielding redox, photoluminescent, and solvatochromic properties. DMF's UV–Vis. spectroscopy showed a lower bandgap of 2.10 eV, strong spin-allowed π-π∗ transitions, and a peak oscillator strength of 0.784 due to dielectric stabilisation and reduced hydrogen bond interference. TRPL measurements showed an extended excited-state average lifetime of 20.4 ns, indicating reduced non-radiative decay and efficient intramolecular charge retention. Because of improved π–π∗ stacking, electroactive surface area, and electron delocalisation, cyclic voltammetry revealed improved redox reversibility, diffusion coefficients, and capacitive properties, and the DMF solvent attained a specific capacitance of 196 Fg^-1. DMF's ability to adjust the frontier orbital separation of 2.09 eV based on HOMO-LUMO energy levels makes it suitable for charge storage and transfer. Chromaticity mapping (CIE, CRI, SPD) showed that polarity affects emission colour tuning, with DMF having the highest colour saturation of 31.6 % and bathochromic shift. In antioxidant assays, hydrophilic phenolics demonstrated significant radical-scavenging activity (IC₅₀ = 2.572 μg/mL) in aqueous extracts. T. catappa tannins are photophysically abundant, electrochemically resilient, and structurally adaptable biochromophores for environmentally sustainable optoelectronics, photonic sensors, and bio-integrated energy devices.

本研究考察了石麻叶生物分子发色团系统的抗氧化、光电和电化学性质。这些叶子富含π共轭多酚。去离子水、甲醇和二甲基甲酰胺（DMF）的萃取主要关注溶质-溶剂相互作用，产生氧化还原、光致发光和溶剂致变色性质。DMF的紫外吸收。光谱分析表明，该材料的带隙较低，为2.10 eV，具有较强的自旋允许π-π∗跃迁，由于介电稳定性和减少了氢键干扰，峰值振荡器强度为0.784。TRPL测量显示激发态平均寿命延长至20.4 ns，表明非辐射衰变减少，分子内电荷保留有效。由于改进了π -π *堆叠、电活性表面积和电子离域，循环伏安法显示DMF溶剂的氧化还原可变性、扩散系数和电容性能得到了改善，并且DMF溶剂的比电容达到了196 gf -1。DMF基于HOMO-LUMO能级调节2.09 eV前沿轨道间距的能力使其适合于电荷的存储和转移。色度映射（CIE， CRI， SPD）显示极性影响发射颜色调整，DMF具有最高的31.6%的色彩饱和度和色移。在抗氧化实验中，亲水性酚类物质在水提物中表现出明显的自由基清除活性（IC50 = 2.572 μg/mL）。紫杉单宁是一种光物理丰富、电化学弹性强、结构适应性强的生物发色团，可用于环境可持续的光电子、光子传感器和生物集成能源设备。

{"title":"Solvent-orchestrated intramolecular exciton reordering and π–π∗ transition engineering in tannin matrices: A comprehensive spectro-electrochemical mapping of Terminalia-based chromophores","authors":"R. Chaithra, A.P. Nagendra Babu, D. Harshitha, C.G. Renuka","doi":"10.1016/j.optmat.2026.117872","DOIUrl":"10.1016/j.optmat.2026.117872","url":null,"abstract":"<div><div>This study examines Terminalia catappa leaf biomolecular chromophore system antioxidant, optoelectronic, and electrochemical properties. These leaves are rich in π-conjugated polyphenols. Deionised water, methanol, and dimethylformamide (DMF) extraction focused on solute-solvent interactions, yielding redox, photoluminescent, and solvatochromic properties. DMF's UV–Vis. spectroscopy showed a lower bandgap of 2.10 eV, strong spin-allowed π-π∗ transitions, and a peak oscillator strength of 0.784 due to dielectric stabilisation and reduced hydrogen bond interference. TRPL measurements showed an extended excited-state average lifetime of 20.4 ns, indicating reduced non-radiative decay and efficient intramolecular charge retention. Because of improved π–π∗ stacking, electroactive surface area, and electron delocalisation, cyclic voltammetry revealed improved redox reversibility, diffusion coefficients, and capacitive properties, and the DMF solvent attained a specific capacitance of 196 Fg-1. DMF's ability to adjust the frontier orbital separation of 2.09 eV based on HOMO-LUMO energy levels makes it suitable for charge storage and transfer. Chromaticity mapping (CIE, CRI, SPD) showed that polarity affects emission colour tuning, with DMF having the highest colour saturation of 31.6 % and bathochromic shift. In antioxidant assays, hydrophilic phenolics demonstrated significant radical-scavenging activity (IC50 = 2.572 μg/mL) in aqueous extracts. T. catappa tannins are photophysically abundant, electrochemically resilient, and structurally adaptable biochromophores for environmentally sustainable optoelectronics, photonic sensors, and bio-integrated energy devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117872"},"PeriodicalIF":4.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-infrared persistent luminescence of intrinsic Ti3+ in Na0·5Y0·5TiO3 and Na0·5Y0·5TiO3:Pr for dual-modal optical anti-counterfeiting Na0·5Y0·5TiO3和Na0·5Y0·5TiO3:Pr中本征Ti3+的近红外持续发光双模光学防伪

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117886

Gulizhabaier Abulipizi , Leping Ding , Juanjuan Zhou , Xiao Ma , Chaomin Qu , Ziang Zong , Yawen Zheng , Huai Chen , Zhanjun Li

Persistent luminescence (PersL) materials have unique long-term separable excitation-emission properties. In this study, intrinsic near-infrared (NIR) PersL of Ti³⁺ is found at 760 nm in undoped Na_0·5Y_0·5TiO₃ (NYT) after being illuminated to room light or red LED illumination. The low symmetric monoclinic perovskite structure of NYT leads to energy level splitting of Ti³⁺ into ²E_1/2 and ¹E_2/2, which generates a new PersL excitation peak at ∼650 nm. Direct electron transfer from excited Ti³⁺ to oxygen vacancy is verified during the PersL charging process by X-ray photoelectron spectroscopy which avoids cross-band transition. Further, double band visible/NIR PersL is realized by introducing Pr³⁺ into NYT (Na_0·5Y_0·5TiO₃:Pr, NYT-Pr) at 614 and 760 nm, respectively. By observing the anti-Stokes PersL of Pr in NYT-Pr at 614 nm that is rechargeable at 660 nm, a phonon-assisted charging mechanism is proposed, in which Ti³⁺ absorbs excitation and phonon energy to realize electron transfer to oxygen vacancy (V_O). Based on single band PersL NYT and double band PersL NYT-Pr, triple modal optical information encryption was realized by applying their visible fluorescence/visible PersL/invisible NIR PersL properties, showing different levels of optical information. NYT-Pr integrates traditional visible PersL by naked eyes and invisible NIR PersL imaged by CCD camera together, and will find promising applications in modern optics and bio-optics.

持续发光（PersL）材料具有独特的长期可分离激发-发射特性。在本研究中，在未掺杂的Na0·5Y0·5TiO3 （NYT）中，在室内光或红色LED照明下，在760 nm处发现了Ti3+的本征近红外（NIR） PersL。NYT的低对称单斜钙钛矿结构导致Ti3+的能级分裂为2E1/2和1E2/2，在~ 650 nm处产生新的PersL激发峰。利用x射线光电子能谱证实了在PersL充电过程中电子从受激Ti3+直接转移到氧空位，从而避免了跨带跃迁。通过在614 nm和760 nm分别引入Pr3+到NYT （Na0·5Y0·5TiO3:Pr, NYT-Pr）中，实现了双波段可见/近红外perl。通过观察614 nm可充电的NYT-Pr中Pr的反stokes PersL，提出了Ti3+吸收激发和声子能量实现电子向氧空位（VO）转移的声子辅助充电机制。基于单波段PersL NYT和双波段PersL NYT- pr，利用其可见荧光/可见PersL/不可见近红外PersL特性，实现了三模态光学信息加密，显示出不同层次的光学信息。NYT-Pr将传统的肉眼可见PersL和CCD相机成像的不可见近红外PersL结合在一起，在现代光学和生物光学领域具有广阔的应用前景。

{"title":"Near-infrared persistent luminescence of intrinsic Ti3+ in Na0·5Y0·5TiO3 and Na0·5Y0·5TiO3:Pr for dual-modal optical anti-counterfeiting","authors":"Gulizhabaier Abulipizi , Leping Ding , Juanjuan Zhou , Xiao Ma , Chaomin Qu , Ziang Zong , Yawen Zheng , Huai Chen , Zhanjun Li","doi":"10.1016/j.optmat.2026.117886","DOIUrl":"10.1016/j.optmat.2026.117886","url":null,"abstract":"<div><div>Persistent luminescence (PersL) materials have unique long-term separable excitation-emission properties. In this study, intrinsic near-infrared (NIR) PersL of Ti3+ is found at 760 nm in undoped Na0·5Y0·5TiO3 (NYT) after being illuminated to room light or red LED illumination. The low symmetric monoclinic perovskite structure of NYT leads to energy level splitting of Ti3+ into 2E1/2 and 1E2/2, which generates a new PersL excitation peak at ∼650 nm. Direct electron transfer from excited Ti3+ to oxygen vacancy is verified during the PersL charging process by X-ray photoelectron spectroscopy which avoids cross-band transition. Further, double band visible/NIR PersL is realized by introducing Pr3+ into NYT (Na0·5Y0·5TiO3:Pr, NYT-Pr) at 614 and 760 nm, respectively. By observing the anti-Stokes PersL of Pr in NYT-Pr at 614 nm that is rechargeable at 660 nm, a phonon-assisted charging mechanism is proposed, in which Ti3+ absorbs excitation and phonon energy to realize electron transfer to oxygen vacancy (VO). Based on single band PersL NYT and double band PersL NYT-Pr, triple modal optical information encryption was realized by applying their visible fluorescence/visible PersL/invisible NIR PersL properties, showing different levels of optical information. NYT-Pr integrates traditional visible PersL by naked eyes and invisible NIR PersL imaged by CCD camera together, and will find promising applications in modern optics and bio-optics.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117886"},"PeriodicalIF":4.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband NIR-I/II emitting phosphor Cr3+-Ni2+ Co-doped Mg3Y2Ge3O12 for deep-tissue imaging & night vision 宽带NIR-I/II发射荧光粉Cr3+-Ni2+共掺杂Mg3Y2Ge3O12用于深部组织成像和夜视

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117883

KeXin Zhu , Zhen Yan , Jiwen Chang , Jinmeng Xiang , Renze Chen , Haoliang Yang , Chongfeng Guo

Near-infrared (NIR) phosphors exhibit excellent tissue penetration capabilities and the responsiveness to specific stimuli, endowing them with great application prospects in fields of biological imaging, night vision, and non-destructive testing. However, the development of ultra-broadband NIR light sources for diverse application scenarios remains a significant challenge. Herein, a broadband NIR-emitting phosphor Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ covering the first biological window (NIR-I) and the second biological window (NIR-II) was successfully achieved through Cr³⁺ → Ni²⁺ efficient energy transfer process, where the broad band emission in NIR-I region comes from Cr³⁺ while the other broad band emission in NIR-II zone originates from Ni²⁺. Furthermore, Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ demonstrates excellent thermal stability, with its luminescence intensity only slightly decreases to 61 % of the initial value at 423 K, attributed to the larger Stokes shift. Finally, an NIR phosphor-converted light-emitting diode (pc-LED) was fabricated by combining the as-prepared phosphor Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ with commercial blue light chips (450 nm), which exhibited outstanding performance in biological imaging, non-destructive testing, and night vision.

近红外（NIR）荧光粉具有优异的组织穿透能力和对特定刺激的响应能力，在生物成像、夜视和无损检测等领域具有广阔的应用前景。然而，开发各种应用场景的超宽带近红外光源仍然是一个重大挑战。本文通过Cr3+→Ni2+的高效能量转移过程，成功制备了覆盖第一生物窗口（NIR-I）和第二生物窗口（NIR-II）的宽带nir发光荧光粉Mg3Y2Ge3O12:Cr3+， Ni2+，其中NIR-I区的宽带发射来自Cr3+，而NIR-II区的宽带发射来自Ni2+。此外，Mg3Y2Ge3O12:Cr3+， Ni2+表现出优异的热稳定性，在423 K时，由于Stokes位移较大，其发光强度仅略微下降到初始值的61%。最后，将制备的荧光粉Mg3Y2Ge3O12:Cr3+， Ni2+与商用蓝光芯片（450nm）相结合，制备了近红外磷转换发光二极管（pc-LED），该二极管在生物成像、无损检测和夜视方面表现出优异的性能。

{"title":"Broadband NIR-I/II emitting phosphor Cr3+-Ni2+ Co-doped Mg3Y2Ge3O12 for deep-tissue imaging & night vision","authors":"KeXin Zhu , Zhen Yan , Jiwen Chang , Jinmeng Xiang , Renze Chen , Haoliang Yang , Chongfeng Guo","doi":"10.1016/j.optmat.2026.117883","DOIUrl":"10.1016/j.optmat.2026.117883","url":null,"abstract":"<div><div>Near-infrared (NIR) phosphors exhibit excellent tissue penetration capabilities and the responsiveness to specific stimuli, endowing them with great application prospects in fields of biological imaging, night vision, and non-destructive testing. However, the development of ultra-broadband NIR light sources for diverse application scenarios remains a significant challenge. Herein, a broadband NIR-emitting phosphor Mg3Y2Ge3O12:Cr3+, Ni2+ covering the first biological window (NIR-I) and the second biological window (NIR-II) was successfully achieved through Cr3+ → Ni2+ efficient energy transfer process, where the broad band emission in NIR-I region comes from Cr3+ while the other broad band emission in NIR-II zone originates from Ni2+. Furthermore, Mg3Y2Ge3O12:Cr3+, Ni2+ demonstrates excellent thermal stability, with its luminescence intensity only slightly decreases to 61 % of the initial value at 423 K, attributed to the larger Stokes shift. Finally, an NIR phosphor-converted light-emitting diode (pc-LED) was fabricated by combining the as-prepared phosphor Mg3Y2Ge3O12:Cr3+, Ni2+ with commercial blue light chips (450 nm), which exhibited outstanding performance in biological imaging, non-destructive testing, and night vision.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117883"},"PeriodicalIF":4.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal tuning of the bandgap in β-(AlxGa1-x)2O3/Al2O3 heterostructures for tunable photodetector performance β-(AlxGa1-x)2O3/Al2O3异质结构带隙的热调谐对可调谐光电探测器性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117885

Shengsheng Chen , Jiachang Zhuang , Yangmei Xin , Chenxi Wang , Qiqing Li , Dan Yang , Haizhong Zhang , Xiaoqiang Lu , Minmin Zhu

The ultrawide-bandgap semiconductor Ga₂O₃, characterized by its high breakdown voltage, demonstrates significant potential for applications in optoelectronics and photonics. In this study, we propose a cost-effective strategy for the scalable production of Al-doped Ga₂O₃ via post-growth thermal annealing. Our results demonstrate that the binary β-Ga₂O₃ films are first alloyed into ternary (

\bar{2}

01) β-(Al_xGa_1-x)₂O₃ alloys with tunable compositions under optimized annealing conditions, ultimately forming β-(Al_xGa_1-x)₂O₃/Al₂O₃ heterostructures. Specifically, through X-ray diffraction (XRD) analysis, the Al content of the β-Ga₂O₃ template samples without annealing and annealed up to 1300 °C ranges from 0 to 0.598, with the optical bandgap tunable from 5.01 eV to 6.30 eV. Moreover, the resulting ultraviolet photodetectors based on these composites exhibit enhanced photoresponse performance, with a low dark current of 16.6 fA, a maximum on/off current ratio of 4.53 × 10⁶, and a remarkable responsivity of 5.48 A/W. This study provides a straightforward and efficient approach for tailoring the bandgap of β-(Al_xGa_1-x)₂O₃ films for deep-ultraviolet optoelectronic applications.

超宽带隙半导体Ga2O3具有高击穿电压的特点，在光电子学和光子学领域具有重要的应用潜力。在这项研究中，我们提出了一种经济有效的策略，通过生长后热退火可扩展生产al掺杂Ga2O3。结果表明，在优化的退火条件下，二元β- ga2o3薄膜首先被合金化成成分可调的三元（2¯01）β-(AlxGa1-x)2O3合金，最终形成β-(AlxGa1-x)2O3/Al2O3异质结构。具体而言，通过x射线衍射（XRD）分析，未经退火和退火至1300℃的β-Ga2O3模板样品的Al含量在0 ~ 0.598之间，光学带隙在5.01 ~ 6.30 eV之间可调。此外，基于这些复合材料的紫外光电探测器具有较好的光响应性能，暗电流低至16.6 fA，最大通断电流比为4.53 × 106，响应率为5.48 a /W。该研究为深紫外光电应用中β-(AlxGa1-x)2O3薄膜的带隙定制提供了一种简单有效的方法。

{"title":"Thermal tuning of the bandgap in β-(AlxGa1-x)2O3/Al2O3 heterostructures for tunable photodetector performance","authors":"Shengsheng Chen , Jiachang Zhuang , Yangmei Xin , Chenxi Wang , Qiqing Li , Dan Yang , Haizhong Zhang , Xiaoqiang Lu , Minmin Zhu","doi":"10.1016/j.optmat.2026.117885","DOIUrl":"10.1016/j.optmat.2026.117885","url":null,"abstract":"<div><div>The ultrawide-bandgap semiconductor Ga2O3, characterized by its high breakdown voltage, demonstrates significant potential for applications in optoelectronics and photonics. In this study, we propose a cost-effective strategy for the scalable production of Al-doped Ga2O3 via post-growth thermal annealing. Our results demonstrate that the binary β-Ga2O3 films are first alloyed into ternary (<math><mrow><mover><mn>2</mn><mo>¯</mo></mover></mrow></math>01) β-(AlxGa1-x)2O3 alloys with tunable compositions under optimized annealing conditions, ultimately forming β-(AlxGa1-x)2O3/Al2O3 heterostructures. Specifically, through X-ray diffraction (XRD) analysis, the Al content of the β-Ga2O3 template samples without annealing and annealed up to 1300 °C ranges from 0 to 0.598, with the optical bandgap tunable from 5.01 eV to 6.30 eV. Moreover, the resulting ultraviolet photodetectors based on these composites exhibit enhanced photoresponse performance, with a low dark current of 16.6 fA, a maximum on/off current ratio of 4.53 × 106, and a remarkable responsivity of 5.48 A/W. This study provides a straightforward and efficient approach for tailoring the bandgap of β-(AlxGa1-x)2O3 films for deep-ultraviolet optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117885"},"PeriodicalIF":4.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Refractive index, its chromatic dispersion, and thermal coefficients of four less common glycols 四种不太常见的二醇的折射率、色散和热系数

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-10 DOI: 10.1016/j.optmat.2026.117874

Anastasiya Derkachova , Daniel Jakubczyk , Gennadiy Derkachov , Kwasi Nyandey

We report comprehensive measurements of the refractive index as a function of wavelength and temperature for four less commonly studied glycols: pentaethylene glycol, hexaethylene glycol, dipropylene glycol (mixture of isomers), and tripropylene glycol. The measurements cover the spectral range of 0.39–1.07 μm and temperatures from 1°C to 45°C. The data were modeled using a two-pole Sellmeier equation, with temperature dependence expressed through wavelength-dependent thermal coefficients. Four fitting models (Sellmeier and Cauchy) with different numbers of parameters were tested; for pentaethylene glycol, results from all models are shown, while for the remaining glycols, only the two-pole Sellmeier fits are presented in tabulated form. Thermal coefficient values for six wavelengths of practical importance are also tabulated. Experimental uncertainties in refractive index, wavelength, and temperature were rigorously evaluated and incorporated into the analysis. The influence of sample purity – including residual water content and manufacturer-reported impurities – was assessed and accounted for in the uncertainty estimates. To our knowledge, this is the first dataset to systematically characterize both chromatic dispersion and thermal variation of the refractive index for these glycols over such a broad spectral and temperature range. The validated fitting equations and parameters are suitable for use in optical modeling, materials characterization, and related applications. All raw data are available in a publicly accessible repository.

我们报告了四种不太常见的乙二醇的折射率作为波长和温度的函数的综合测量：五乙二醇、六乙二醇、二丙二醇（异构体的混合物）和三丙二醇。测量光谱范围为0.39-1.07 μm，温度范围为1°C至45°C。数据使用两极Sellmeier方程建模，通过波长相关热系数表示温度依赖性。对4种参数数不同的拟合模型（Sellmeier和Cauchy）进行了检验；对于五乙二醇，显示了所有模型的结果，而对于其余的乙二醇，只有两极Sellmeier拟合以表格形式呈现。还列出了六个实际重要波长的热系数值。在折射率，波长和温度的实验不确定度进行了严格的评估，并纳入分析。样品纯度的影响——包括残余水含量和制造商报告的杂质——在不确定度估计中进行了评估和考虑。据我们所知，这是第一个系统地描述这些乙二醇在如此宽的光谱和温度范围内的色散和折射率的热变化的数据集。经过验证的拟合方程和参数适用于光学建模、材料表征和相关应用。所有原始数据都在一个可公开访问的存储库中。

{"title":"Refractive index, its chromatic dispersion, and thermal coefficients of four less common glycols","authors":"Anastasiya Derkachova , Daniel Jakubczyk , Gennadiy Derkachov , Kwasi Nyandey","doi":"10.1016/j.optmat.2026.117874","DOIUrl":"10.1016/j.optmat.2026.117874","url":null,"abstract":"<div><div>We report comprehensive measurements of the refractive index as a function of wavelength and temperature for four less commonly studied glycols: pentaethylene glycol, hexaethylene glycol, dipropylene glycol (mixture of isomers), and tripropylene glycol. The measurements cover the spectral range of 0.39–1.07 μm and temperatures from 1°C to 45°C. The data were modeled using a two-pole Sellmeier equation, with temperature dependence expressed through wavelength-dependent thermal coefficients. Four fitting models (Sellmeier and Cauchy) with different numbers of parameters were tested; for pentaethylene glycol, results from all models are shown, while for the remaining glycols, only the two-pole Sellmeier fits are presented in tabulated form. Thermal coefficient values for six wavelengths of practical importance are also tabulated. Experimental uncertainties in refractive index, wavelength, and temperature were rigorously evaluated and incorporated into the analysis. The influence of sample purity – including residual water content and manufacturer-reported impurities – was assessed and accounted for in the uncertainty estimates. To our knowledge, this is the first dataset to systematically characterize both chromatic dispersion and thermal variation of the refractive index for these glycols over such a broad spectral and temperature range. The validated fitting equations and parameters are suitable for use in optical modeling, materials characterization, and related applications. All raw data are available in a publicly accessible repository.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"173 ","pages":"Article 117874"},"PeriodicalIF":4.2,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0