Optical Materials最新文献

英文中文

Investigation of bandgap and optical properties of Ag+/Al3+ co-alloyed lead-free double perovskite Cs2NaBiCl6

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-02 DOI: 10.1016/j.optmat.2025.116768

Qilin Yu, Pengjun Zhang, Shuwei Hao, Chongqiang Zhu, Chunhui Yang

Lead-free bismuth metal halide perovskites have caused widespread concerns due to their low toxicity and intrinsic thermodynamic stability. In this work, a series of Cs₂Na_1-xAg_xBiCl₆ and Al³⁺-alloyed Cs₂(Na/Ag)BiCl₆ perovskites were designed and prepared by a single-step solvothermal method. The results showed that Ag⁺ could effectively enhance the luminescence performance increasing the photoluminescence quantum yield (PLQY) from 0.46 % to 25.11 %, and adjust the bandgap from 3.06 eV(x = 0) to 2.53 eV(x = 0.75). Al³⁺-alloyed Cs₂(Na/Ag)BiCl₆ perovskites further raised the PLQY up to 31.39 %, which was attributed to that Al³⁺ could increase the self-trapped excitons (STEs) density and radiative transition rate of Cs₂(Na/Ag)BiCl₆, determined from density of states analysis, photoluminescence (PL)/photoluminescence excitation (PLE) and time-resolved photoluminescence (TRPL) spectra. The bandgap trend of Ag⁺ and Al³⁺ replacing Na⁺ and Bi³⁺ was also explained by density functional theory (DFT) calculations. The stability experiment results showed that the prepared perovskite could maintain its structure at 673 K and keep the original PL intensity after exposure to ambient air for 30 days, which indicated the sample had excellent structural stability and luminescence stability.

{"title":"Investigation of bandgap and optical properties of Ag+/Al3+ co-alloyed lead-free double perovskite Cs2NaBiCl6","authors":"Qilin Yu, Pengjun Zhang, Shuwei Hao, Chongqiang Zhu, Chunhui Yang","doi":"10.1016/j.optmat.2025.116768","DOIUrl":"10.1016/j.optmat.2025.116768","url":null,"abstract":"<div><div>Lead-free bismuth metal halide perovskites have caused widespread concerns due to their low toxicity and intrinsic thermodynamic stability. In this work, a series of Cs2Na1-xAgxBiCl6 and Al3+-alloyed Cs2(Na/Ag)BiCl6 perovskites were designed and prepared by a single-step solvothermal method. The results showed that Ag+ could effectively enhance the luminescence performance increasing the photoluminescence quantum yield (PLQY) from 0.46 % to 25.11 %, and adjust the bandgap from 3.06 eV(x = 0) to 2.53 eV(x = 0.75). Al3+-alloyed Cs2(Na/Ag)BiCl6 perovskites further raised the PLQY up to 31.39 %, which was attributed to that Al3+ could increase the self-trapped excitons (STEs) density and radiative transition rate of Cs2(Na/Ag)BiCl6, determined from density of states analysis, photoluminescence (PL)/photoluminescence excitation (PLE) and time-resolved photoluminescence (TRPL) spectra. The bandgap trend of Ag+ and Al3+ replacing Na+ and Bi3+ was also explained by density functional theory (DFT) calculations. The stability experiment results showed that the prepared perovskite could maintain its structure at 673 K and keep the original PL intensity after exposure to ambient air for 30 days, which indicated the sample had excellent structural stability and luminescence stability.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"160 ","pages":"Article 116768"},"PeriodicalIF":3.8,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376605","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

Development of Nd-doped CaHfO3 single crystal scintillator emitting near-infrared region

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-02 DOI: 10.1016/j.optmat.2025.116767

Yusuke Endo, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida

Nd:CaHfO₃ single crystals were prepared using the floating zone method, and their optical and scintillation properties were evaluated. The 1.0 % Nd:CaHfO₃ sample showed the highest quantum yield of 91.1 % under excitation at 800 nm among the samples. The X-ray-induced scintillation spectra showed multiple emission peaks due to the 4f–4f transitions of Nd³⁺ in the visible and near-infrared regions. The afterglow values were within the range of 1400–2300 ppm and better than those of the previous study about rare-earth-doped CaHfO₃ single crystals. All the Nd:CaHfO₃ samples showed a proportional relationship in the 0.005–51 Gy/h, and the 2.0 % Nd:CaHfO₃ sample showed the highest proportionality among the samples.

引用次数: 0

Highly efficient blue-emitting silicate phosphor BaY4Si5O17:Eu2+ with superior thermal stability for full-visible-spectrum white LEDs

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116578

Maoli Wang , Lijuan Xiao , Jiangcong Zhou , Zhiwei Tang , Jianyan Ding , Xiaoping Zhou , Quansheng Wu , Lihua Qiu , Rui Zhang

Activators that occupy a single lattice site with high structural rigidity in the host can endow the phosphor with a superior thermal stability and high quantum yield. The monoclinic structure phosphor BaY₄Si₅O₁₇:Eu²⁺ (BYSO: Eu²⁺) features a single BaO₈ site within the host lattice for the occupation of the Eu²⁺ ion, offering a broad n-UV excitation bandwidth ranging from 250 to 400 nm and a blue emission band peaking at 464 nm. This phosphor exhibits remarkably low thermal quenching, with integrated emission intensities at 373 K and 423 K maintaining 87 % and 76.9 % of their values at 298 K, respectively. The component substitution strategy of Sr²⁺ replacing Ba²⁺ has been found to enhance thermal stability, retaining over 87 % of its initial luminescence intensity at 423 K and displaying a high thermal activation energy of 0.14 eV, which effectively reduces thermally induced non-radiative energy transfer. Moreover, this substitution improves luminescence efficiency, with the quantum yield increasing from 77.84 % to 84.43 %. A white light-emitting diode was constructed using this phosphor in conjunction with commercial phosphors on a 360 nm UV-emitting chip, resulting in CIE color coordinates of (0.3343, 0.3528), a color rendering index (CRI) of 94.5, and a color temperature (CCT) of 5431 K at a current of 140 mA. The outstanding properties of BYSO: Eu²⁺ indicate their suitability for applications in high-color-quality full-visible-spectrum LED lighting.

{"title":"Highly efficient blue-emitting silicate phosphor BaY4Si5O17:Eu2+ with superior thermal stability for full-visible-spectrum white LEDs","authors":"Maoli Wang , Lijuan Xiao , Jiangcong Zhou , Zhiwei Tang , Jianyan Ding , Xiaoping Zhou , Quansheng Wu , Lihua Qiu , Rui Zhang","doi":"10.1016/j.optmat.2024.116578","DOIUrl":"10.1016/j.optmat.2024.116578","url":null,"abstract":"<div><div>Activators that occupy a single lattice site with high structural rigidity in the host can endow the phosphor with a superior thermal stability and high quantum yield. The monoclinic structure phosphor BaY4Si5O17:Eu2+ (BYSO: Eu2+) features a single BaO8 site within the host lattice for the occupation of the Eu2+ ion, offering a broad n-UV excitation bandwidth ranging from 250 to 400 nm and a blue emission band peaking at 464 nm. This phosphor exhibits remarkably low thermal quenching, with integrated emission intensities at 373 K and 423 K maintaining 87 % and 76.9 % of their values at 298 K, respectively. The component substitution strategy of Sr2+ replacing Ba2+ has been found to enhance thermal stability, retaining over 87 % of its initial luminescence intensity at 423 K and displaying a high thermal activation energy of 0.14 eV, which effectively reduces thermally induced non-radiative energy transfer. Moreover, this substitution improves luminescence efficiency, with the quantum yield increasing from 77.84 % to 84.43 %. A white light-emitting diode was constructed using this phosphor in conjunction with commercial phosphors on a 360 nm UV-emitting chip, resulting in CIE color coordinates of (0.3343, 0.3528), a color rendering index (CRI) of 94.5, and a color temperature (CCT) of 5431 K at a current of 140 mA. The outstanding properties of BYSO: Eu2+ indicate their suitability for applications in high-color-quality full-visible-spectrum LED lighting.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116578"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096632","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

Structural and optical studies of Sb2S3 films deposited by electron beam evaporation with post-annealing treatment

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116565

Shiyao Gu , Saad Ullah , Firoz Khan , Xiaoxia Wang , Ping Liu , Shi-e Yang , Yongsheng Chen

Antimony sesquisulfide (Sb₂S₃) has emerged as a prospective and attractive material for next-generation solar cells due to its success in solution processing, high stability, low toxicity, and exceptional optoelectronic properties. Exploring the growth properties of Sb₂S₃ films is imperative to further improve the power conversion efficiency (PCE). In this investigation, Sb₂S₃ films were effectively produced through the application of electron beam evaporation, which was subsequently followed by post-annealing treatment. The impact of annealing temperature, duration, and target weight on crystalline orientation, morphology, internal stress, and optical characteristics were examined. The films exhibited a pure orthogonal phase with strong [hk0] crystalline orientation, uniform surface, and large grains after the annealing process. The Raman spectrum analysis demonstrated that sulfur loss in films escalates with increasing annealing temperature and time. The stress in the (hk1) and (hk0) planes increases with the increase of film thickness, and the stress in the former is greater than that of the latter. The synergistic effects of the electron beam evaporation technique and subsequent post-annealing treatment further illustrate the promising potential of Sb₂S₃ for use in solar cells.

{"title":"Structural and optical studies of Sb2S3 films deposited by electron beam evaporation with post-annealing treatment","authors":"Shiyao Gu , Saad Ullah , Firoz Khan , Xiaoxia Wang , Ping Liu , Shi-e Yang , Yongsheng Chen","doi":"10.1016/j.optmat.2024.116565","DOIUrl":"10.1016/j.optmat.2024.116565","url":null,"abstract":"<div><div>Antimony sesquisulfide (Sb2S3) has emerged as a prospective and attractive material for next-generation solar cells due to its success in solution processing, high stability, low toxicity, and exceptional optoelectronic properties. Exploring the growth properties of Sb2S3 films is imperative to further improve the power conversion efficiency (PCE). In this investigation, Sb2S3 films were effectively produced through the application of electron beam evaporation, which was subsequently followed by post-annealing treatment. The impact of annealing temperature, duration, and target weight on crystalline orientation, morphology, internal stress, and optical characteristics were examined. The films exhibited a pure orthogonal phase with strong [hk0] crystalline orientation, uniform surface, and large grains after the annealing process. The Raman spectrum analysis demonstrated that sulfur loss in films escalates with increasing annealing temperature and time. The stress in the (hk1) and (hk0) planes increases with the increase of film thickness, and the stress in the former is greater than that of the latter. The synergistic effects of the electron beam evaporation technique and subsequent post-annealing treatment further illustrate the promising potential of Sb2S3 for use in solar cells.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116565"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096633","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

Effect of temperature and atmosphere on thermolysis of Ce1-xPrx(HCOO)3 precursor for obtaining a palette of pigments based on praseodymium-doped ceria Ce1-xPrxO2

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116591

I.V. Baklanova, V.N. Krasil'nikov, V.P. Zhukov, T.V. Dyachkova, Yu.A. Deeva, А.P. Tyutyunnik

For the first time, the possibility of obtaining nanostructured Ce_1-xPr_xO₂ oxides by the precursor method using mixed Ce_1-хPr_х(HCOO)₃ (0 ≤ x ≤ 1) formates as a precursor was demonstrated. Thermal decomposition of precursors upon heating in air and inert atmosphere is a pseudomorphic process, i.e. the three-dimensional architecture of the crystalline aggregates of the precursor is inherited by the product of its thermolysis. For the first time, the patterns of formation of the morphology, composition, properties and nature of oxides formed as a result of thermal decomposition of Ce_1-хPr_х(HCOO)₃ in an inert helium atmosphere, where both the composition of the precursor and the temperature of its heating are of great importance, have been revealed. The charge transfer band (O²⁻→Pr⁴⁺) determines the presence of red and red-brown coloration in Ce_1-xPr_xO₂ powders. The reducing atmosphere resulting from the decomposition of the organic component of the precursor (HCOO⁻) to form CO and H₂ causes a decrease in the Pr⁴⁺/Pr³⁺ ratio in the Ce_1-xPr_xO₂ oxides, which greatly affects their color characteristics. The Ce_1-xPr_xO₂ fluorite structure is retained for the composition with x = 0.5, and at higher praseodymium concentrations, other oxides are formed. Thus, the products of thermolysis of Ce_0.25Pr_0.75(HCOO)₃ and Pr(HCOO)₃ formates are the (Ce_0.25Pr_0.75)₂O₃ oxide with the cubic structure Ce₂O₃ and Pr₂O₃, the powders of which have a yellow-green and yellow color, respectively. The following methods were used to describe the properties of the obtained samples: X-ray diffraction, SEM and EDX, Raman spectroscopy, excitation and luminescence spectra, UV–Vis–NIR spectra, and the electron density functional method.

{"title":"Effect of temperature and atmosphere on thermolysis of Ce1-xPrx(HCOO)3 precursor for obtaining a palette of pigments based on praseodymium-doped ceria Ce1-xPrxO2","authors":"I.V. Baklanova, V.N. Krasil'nikov, V.P. Zhukov, T.V. Dyachkova, Yu.A. Deeva, А.P. Tyutyunnik","doi":"10.1016/j.optmat.2024.116591","DOIUrl":"10.1016/j.optmat.2024.116591","url":null,"abstract":"<div><div>For the first time, the possibility of obtaining nanostructured Ce1-xPrxO2 oxides by the precursor method using mixed Ce1-хPrх(HCOO)3 (0 ≤ x ≤ 1) formates as a precursor was demonstrated. Thermal decomposition of precursors upon heating in air and inert atmosphere is a pseudomorphic process, i.e. the three-dimensional architecture of the crystalline aggregates of the precursor is inherited by the product of its thermolysis. For the first time, the patterns of formation of the morphology, composition, properties and nature of oxides formed as a result of thermal decomposition of Ce1-хPrх(HCOO)3 in an inert helium atmosphere, where both the composition of the precursor and the temperature of its heating are of great importance, have been revealed. The charge transfer band (O2−→Pr4+) determines the presence of red and red-brown coloration in Ce1-xPrxO2 powders. The reducing atmosphere resulting from the decomposition of the organic component of the precursor (HCOO−) to form CO and H2 causes a decrease in the Pr4+/Pr3+ ratio in the Ce1-xPrxO2 oxides, which greatly affects their color characteristics. The Ce1-xPrxO2 fluorite structure is retained for the composition with x = 0.5, and at higher praseodymium concentrations, other oxides are formed. Thus, the products of thermolysis of Ce0.25Pr0.75(HCOO)3 and Pr(HCOO)3 formates are the (Ce0.25Pr0.75)2O3 oxide with the cubic structure Ce2O3 and Pr2O3, the powders of which have a yellow-green and yellow color, respectively. The following methods were used to describe the properties of the obtained samples: X-ray diffraction, SEM and EDX, Raman spectroscopy, excitation and luminescence spectra, UV–Vis–NIR spectra, and the electron density functional method.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116591"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096781","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

Ag/TiO2 photocatalytic synergistic persulfate activation for degradation of methyl orange

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116600

Le Lv , Yafeng Li , Jin Tang , Fuxiang Zhang

Ag/TiO₂ composite photocatalysts were synthesized using a sol-gel reduction method. Their crystal structures and chemical compositions were analyzed through techniques such as XRD and XPS, and their effects in the photocatalytic synergistic PMS system for the degradation of methyl orange were investigated. The results indicated that the Ag/TiO₂ composite photocatalyst was successfully synthesized, with the bandgap energy reduced from 3.23 eV to 3.07 eV. Under optimal conditions—specifically, a reaction time of 20 min, the use of an Ag/TiO₂-1% catalyst, the pH of 2.59, a catalyst dosage of 0.66 g/L, and a PMS dosage of 1.87 mM—the degradation rate of 100 mg/L of MO dye reached 95.83 %. Furthermore, the catalyst maintained a degradation rate of 90 % after five recycling cycles, demonstrating excellent stability and reusability. This study provides a valuable theoretical foundation for the development of efficient photocatalysts and highlights the potential of Ag/TiO₂ photocatalysts for practical applications.

引用次数: 0

Enhancing the optical properties of chitosan-based biopolymer for optoelectronic applications using natural dye extracted from hollyhock waste flowers

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116596

Shujahadeen B. Aziz , Dara M. Aziz , Dana S. Muhammad , Peshawa O. Hama , Omed Gh. Abdullah

The current study focuses on enhancing the optical characteristics of chitosan (CS) biopolymer by incorporating natural dyes extracted from hollyhock waste flowers (HWFs). CS was dissolved in a 1 % acetic acid solution, while pure distilled water was used to extract the natural dyes from HWFs. To avoid the film brittleness of the samples, a fixed amount of glycerol was added to each system. A solution cast procedure was applied to produce flexible dye-doped CS films. FTIR analysis of the HWFs dye reveals the presence of key functional groups, including OH/NH, CO, C–O–C, and CH, which can effectively interact with the host biopolymer. The FTIR spectra of CS, Glycerol (Gly), and the CS:Gly:HWFs-dye show significant interactions between the polymer, plasticizer, and HWFs dye. The increase in the absorption behavior of CS was observed, along with a shift in the absorption edge towards lower photon energies, reaching 2.7 eV. Absorption enhancement is responsible for the decrease in transmittance. As the dye concentration increases, the optical dielectric constant and refractive index improve. Two main methods were used to study the optical band gaps of CS:Gly: HWFs-dye systems in detail. First, the band gap was determined by plotting the optical dielectric loss against photon energy. Second, the Tauc model was employed to identify band-to-band transitions, with potential direct and indirect transitions presented in separate graphs. The system's primary transition types were characterized by comparing optical dielectric loss charts with those derived from the Tauc model. After adding HWFs-dye natural dye, the band gap in the optical viewpoint of pure CS decreased from 5.27 to 2.50 eV. The Urbach energy (E_U) for the films was determined and found to be higher in the doped samples than the pure film. The increase in E_U values with higher HWF dye content in the CS suggests a corresponding rise in disorder and defects within the band structure of the composites. It can be inferred from this that the current technology holds great promise for optoelectronic devices.

{"title":"Enhancing the optical properties of chitosan-based biopolymer for optoelectronic applications using natural dye extracted from hollyhock waste flowers","authors":"Shujahadeen B. Aziz , Dara M. Aziz , Dana S. Muhammad , Peshawa O. Hama , Omed Gh. Abdullah","doi":"10.1016/j.optmat.2024.116596","DOIUrl":"10.1016/j.optmat.2024.116596","url":null,"abstract":"<div><div>The current study focuses on enhancing the optical characteristics of chitosan (CS) biopolymer by incorporating natural dyes extracted from hollyhock waste flowers (HWFs). CS was dissolved in a 1 % acetic acid solution, while pure distilled water was used to extract the natural dyes from HWFs. To avoid the film brittleness of the samples, a fixed amount of glycerol was added to each system. A solution cast procedure was applied to produce flexible dye-doped CS films. FTIR analysis of the HWFs dye reveals the presence of key functional groups, including OH/NH, C<img>O, C–O–C, and CH, which can effectively interact with the host biopolymer. The FTIR spectra of CS, Glycerol (Gly), and the CS:Gly:HWFs-dye show significant interactions between the polymer, plasticizer, and HWFs dye. The increase in the absorption behavior of CS was observed, along with a shift in the absorption edge towards lower photon energies, reaching 2.7 eV. Absorption enhancement is responsible for the decrease in transmittance. As the dye concentration increases, the optical dielectric constant and refractive index improve. Two main methods were used to study the optical band gaps of CS:Gly: HWFs-dye systems in detail. First, the band gap was determined by plotting the optical dielectric loss against photon energy. Second, the Tauc model was employed to identify band-to-band transitions, with potential direct and indirect transitions presented in separate graphs. The system's primary transition types were characterized by comparing optical dielectric loss charts with those derived from the Tauc model. After adding HWFs-dye natural dye, the band gap in the optical viewpoint of pure CS decreased from 5.27 to 2.50 eV. The Urbach energy (EU) for the films was determined and found to be higher in the doped samples than the pure film. The increase in EU values with higher HWF dye content in the CS suggests a corresponding rise in disorder and defects within the band structure of the composites. It can be inferred from this that the current technology holds great promise for optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116596"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096782","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

Tailoring the photoresponse in surface-modified graphene oxide with environmentally-friendly synthesized ZnS and CuS nanoparticles

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116529

Hiral M. Mistry , M.P. Deshpande , Anilkumar B. Hirpara , Nidhishree M. Suchak , Sunil H. Chaki , Sandip V. Bhatt

Notable progress has been achieved in the development of high-performance optoelectronics devices based on graphene oxide (GO) due to its distinctive electrical and optical attributes. This study furnishes an intriguing, eco-friendly approach for preparing nanocomposites comprising ZnS nanoparticles (NPs) embellished GO (ZnS-GO) and CuS NPs embellished GO (CuS-GO). Adhatoda vasica leaf extract acts as both a reducing agent and a linker, facilitating the attachment of ZnS and CuS NPs onto GO sheets. Thorough scrutiny was done on the materials deploying EDX, XPS, XRD, HRTEM, FESEM, PL, and FTIR techniques to endorse their elemental composition, phase purity, crystalline structure, surface morphology, and functional groups. Photodetectors prepared with Ag/ZnS-GO/Ag and Ag/CuS-GO/Ag configurations exhibited non-ohmic charge transport and photoconductive behavior in the visible spectrum. The tuning of these photodetectors was performed under illumination at wavelengths of 480 nm, 520 nm, and 670 nm across different bias voltages. Extensive on-off cycles were employed to evaluate the switching stability of the devices, demonstrating a clear photoresponse and photoswitching behavior. At a bias voltage of 30 V and an illumination wavelength of 480 nm, the ZnS-GO and CuS-GO photodetectors exhibited responsivities of 16.91 mA/W, 24.65 mA/W, and detectivities of 4.23 x 10⁹ Jones, 10.08 x 10⁹ Jones, respectively.

{"title":"Tailoring the photoresponse in surface-modified graphene oxide with environmentally-friendly synthesized ZnS and CuS nanoparticles","authors":"Hiral M. Mistry , M.P. Deshpande , Anilkumar B. Hirpara , Nidhishree M. Suchak , Sunil H. Chaki , Sandip V. Bhatt","doi":"10.1016/j.optmat.2024.116529","DOIUrl":"10.1016/j.optmat.2024.116529","url":null,"abstract":"<div><div>Notable progress has been achieved in the development of high-performance optoelectronics devices based on graphene oxide (GO) due to its distinctive electrical and optical attributes. This study furnishes an intriguing, eco-friendly approach for preparing nanocomposites comprising ZnS nanoparticles (NPs) embellished GO (ZnS-GO) and CuS NPs embellished GO (CuS-GO). Adhatoda vasica leaf extract acts as both a reducing agent and a linker, facilitating the attachment of ZnS and CuS NPs onto GO sheets. Thorough scrutiny was done on the materials deploying EDX, XPS, XRD, HRTEM, FESEM, PL, and FTIR techniques to endorse their elemental composition, phase purity, crystalline structure, surface morphology, and functional groups. Photodetectors prepared with Ag/ZnS-GO/Ag and Ag/CuS-GO/Ag configurations exhibited non-ohmic charge transport and photoconductive behavior in the visible spectrum. The tuning of these photodetectors was performed under illumination at wavelengths of 480 nm, 520 nm, and 670 nm across different bias voltages. Extensive on-off cycles were employed to evaluate the switching stability of the devices, demonstrating a clear photoresponse and photoswitching behavior. At a bias voltage of 30 V and an illumination wavelength of 480 nm, the ZnS-GO and CuS-GO photodetectors exhibited responsivities of 16.91 mA/W, 24.65 mA/W, and detectivities of 4.23 x 109 Jones, 10.08 x 109 Jones, respectively.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116529"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092019","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

Fluorescent alumina fibers: A fluorescent sensor for detecting trace amounts of water in organic solvents

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2025.116760

Guangxu Zhao, Jingjing Zhang, Peng Wang, Xiaoyu Feng, Guishan Liu

Water is a typical impurity in organic solvents, and the detection of trace amounts of water in organic solvents is of great significance both in the chemical field and industrial applications. This work described an innovative preparation method of rare earth europium (Eu³⁺) complexes being grafted on the surface of alumina fibers, which successfully prepared fluorescent alumina fibers and were used as fluorescent probes to detect water in organic solvents. The alumina fibers were prepared by electrostatic spinning, then the surface of alumina was modified by silane coupling agent (APTES) with maleic anhydride (MAH), and finally rare earth europium complexes was grafted on the surface of alumina fibers. The results showed that the rare earth complexes successfully grew on the alumina surface and bonded with –OH on the alumina surface. The addition of water resulted in an overall quenching of the fluorescence intensity of the fluorescent alumina fibers, with detection limits of 0.079 % v/v, 0.121 % v/v, and 0.062 % v/v in ethanol, DMF, and acetone solutions, respectively. This paper provides an innovative approach and methodology for the study of water content detection in organic solvents. This research broadens the potential applications of alumina fibers in functionalization.

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引用次数: 0

Structural, optical, and dielectric investigations of sodium-modified lead-bismuth borate glasses

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.optmat.2024.116573

Divya Yadav , Rajni Bala , Sumit Chauhan , Sanjay Gaur , Deepesh Sharma , Saroj Rani

The current study involves the synthesis of xNa₂O·20PbO·(25-x)Bi₂O₃·55B₂O₃ glass system (with 5 ≤ x ≤ 25 mol%) by melt quench technique to analyze the influence of Na₂O on the structural, optical, and dielectric properties of glass samples. X-ray diffraction (XRD) confirmed the amorphous nature of the samples while scanning electron microscopy (SEM) verified glass formation through morphological analysis. FTIR and Raman spectra analysis suggests that B₂O₃ exists mainly as [BO₄] and [BO₃] structural units. PbO and Bi₂O₃ act as network-modifying [PbO₄] and [BiO₆] octahedral units accordingly. The indirect optical band gap increases with the gradual substitution of Bi₂O₃ by Na₂O content. The synthesized glasses exhibit high electronic oxide ion polarizability (3.253–2.867), optical basicity (1.156–1.087), and metallization criterion values (0.329–0.370), indicating their suitability for non-linear optical devices. The dielectric study revealed non-Debye type behavior in the synthesized glasses.

{"title":"Structural, optical, and dielectric investigations of sodium-modified lead-bismuth borate glasses","authors":"Divya Yadav , Rajni Bala , Sumit Chauhan , Sanjay Gaur , Deepesh Sharma , Saroj Rani","doi":"10.1016/j.optmat.2024.116573","DOIUrl":"10.1016/j.optmat.2024.116573","url":null,"abstract":"<div><div>The current study involves the synthesis of xNa2O·20PbO·(25-x)Bi2O3·55B2O3 glass system (with 5 ≤ x ≤ 25 mol%) by melt quench technique to analyze the influence of Na2O on the structural, optical, and dielectric properties of glass samples. X-ray diffraction (XRD) confirmed the amorphous nature of the samples while scanning electron microscopy (SEM) verified glass formation through morphological analysis. FTIR and Raman spectra analysis suggests that B2O3 exists mainly as [BO4] and [BO3] structural units. PbO and Bi2O3 act as network-modifying [PbO4] and [BiO6] octahedral units accordingly. The indirect optical band gap increases with the gradual substitution of Bi2O3 by Na2O content. The synthesized glasses exhibit high electronic oxide ion polarizability (3.253–2.867), optical basicity (1.156–1.087), and metallization criterion values (0.329–0.370), indicating their suitability for non-linear optical devices. The dielectric study revealed non-Debye type behavior in the synthesized glasses.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"159 ","pages":"Article 116573"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135799","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

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