Journal of Luminescence最新文献_第2页

Structural and photophysical investigations of thermally stable Dy (III) ion complexes incorporated with β-ketocarboxylate and ancillary moieties 掺入β-酮羧酸盐和辅助分子的热稳定镝（III）离子配合物的结构和光物理研究

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-20 DOI: 10.1016/j.jlumin.2024.120995

Riya Gaur, Priti Boora Doon

A series of five dysprosium complexes are synthesized, comprising four ternary and one binary complex with the primary ligand 9,10-Difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido [1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (L) and four ancillary ligands: 1,10-phenanthroline, 4,4′-dimethyl-2,2′-bipyridyl, neocuproine, and 2,2′-bipyridyl. Evaluation of elemental composition of complexes is done via elemental analysis. In contrast, the NMR, FT-IR, UV–visible absorption spectra are used to detect the bonding of the metal center with the primary and the secondary sensitizer. The photoluminescent properties of the formed complex are computed by exciting the complex at 355 nm which reveals the white emanating color of the complex which is attributable to the perfect balance of blue and yellow emission of the complex obtained at 485 nm and 576 nm respectively. The applicability of complexes in wide-gap semiconducting materials are demonstrated by analyzing the photophysical characteristics including optical band gap, diffuse reflectance spectra and refractive index which point towards their promising application in the field of solar devices and military radars. The color coordinates indicate consistency with the coordinates of white light specified by "The National Television System Committee". Their utilization in WOLEDs is validated by considering Correlated Color Temperature, color purity and the Commission International de I’Eclairage 1931 (CIE) color coordinates.

我们合成了一系列五种镝配合物，其中包括四种三元配合物和一种二元配合物，主要配体为 9,10-二氟-2,3-二氢-3-甲基-7-氧代-7H-吡啶并[1,2,3-de]-1,4-苯并恶嗪-6-羧酸（L）和四种辅助配体：1,10-菲罗啉、4,4′-二甲基-2,2′-联吡啶、新乌头碱和 2,2′-联吡啶。复合物的元素组成通过元素分析进行评估。而核磁共振、傅立叶变换红外光谱和紫外可见吸收光谱则用于检测金属中心与主敏化剂和次敏化剂的结合情况。通过在 355 纳米波长下激发形成的复合物，计算出复合物的光致发光特性，结果显示复合物呈现白色，这是因为在 485 纳米波长和 576 纳米波长下，复合物的蓝色和黄色发射达到了完美的平衡。通过分析包括光带隙、漫反射光谱和折射率在内的光物理特性，证明了复合物在宽隙半导体材料中的适用性，这表明它们在太阳能设备和军用雷达领域有着广阔的应用前景。其颜色坐标与 "国家电视系统委员会 "规定的白光坐标一致。考虑到相关色温、色纯度和 1931 年国际照明委员会（CIE）的色彩坐标，它们在 WOLED 中的应用得到了验证。

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引用次数: 0

Exploring the potential of BaLa₂ZnO₅ doped with individual rare-earth ions (Ce³⁺, Er³⁺, Eu³⁺) for w-LEDs, latent fingerprints, and anti-counterfeiting applications 探索掺杂单个稀土离子（Ce³⁺、Er³⁺、Eu³⁺）的 BaLa₂ZnO₅在 w-LED、潜指纹和防伪应用中的潜力

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-19 DOI: 10.1016/j.jlumin.2024.120994

S.C. Sharma

The novel Ce³⁺/Er³⁺/Eu³⁺ (1 mol %) activated BaLa₂ZnO₅ (BLZO) nanophosphors (NPs) were synthesized via a combustion method. Micro-morphology, phase purity, luminescence characteristics, and crystallographic structure of the material are examined. The NPs with the subsequent characteristics exhibit notable emission under 349, 378, and 395 nm excitation: BLZO:Ce³⁺, BLZO:Er³⁺, and BLZO:Eu³⁺ at 400, 550, and 615 nm, respectively. The decay curves of each sample are recorded for specific excitation and emission wavelengths respectively. All the decay curves are well-fitted with single exponential function. The observed average decay time is 1.563, 1.165 and 0.949 ms. In addition, photometric studies including Chromaticity International d’Eclairage (CIE), correlated colour temperature (CCT) and colour purity (CP) are performed. The phosphor demonstrated good contrast, minimal background interference, and great resolution when applied to several substrates in latent fingerprints (LFPs). Therefore, the phosphor provides a material that shows promise for latent fingerprint visualization. The feasibility of the Anti-counterfeiting (AC) function of BLZO: Ce³⁺/Er³⁺/Eu³⁺ phosphor is investigated on a diverse of surfaces using both screen-printing and handwriting techniques. By means of aging, heat treatment, and water immersion treatment, the durability of all three security inks has been investigated. These diverse characterization results indicate that the hypothesized Ce³⁺/Er³⁺/Eu³⁺ activated BLZO phosphor has potential applications in solid-state lighting for white light emitting diodes (w-LEDs), LFPs and AC techniques.

通过燃烧法合成了新型 Ce3+/Er3+/Eu3+ (1 mol %) 活化 BaLa2ZnO5 (BLZO) 纳米磷酸盐 (NPs)。研究了材料的微观形态、相纯度、发光特性和晶体结构。在 349、378 和 395 纳米波长的激发下，具有上述特征的 NPs 发出了显著的荧光：BLZO:Ce3+、BLZO:Er3+ 和 BLZO:Eu3+ 分别在 400、550 和 615 纳米波长下发光。每个样品的衰变曲线分别记录了特定激发和发射波长下的衰变曲线。所有衰变曲线都与单指数函数拟合良好。观察到的平均衰减时间分别为 1.563、1.165 和 0.949 毫秒。此外，还进行了光度研究，包括国际照明色度（CIE）、相关色温（CCT）和色纯度（CP）。将这种荧光粉应用于潜伏指纹（LFP）的几种基底上时，显示出良好的对比度、最小的背景干扰和极高的分辨率。因此，这种荧光粉是一种有望用于潜伏指纹可视化的材料。利用屏幕指纹和手写技术，在多种表面上研究了 BLZO：Ce3+/Er3+/Eu3+ 荧光粉防伪（AC）功能的可行性。通过老化、热处理和水浸泡处理，研究了这三种防伪油墨的耐久性。这些不同的表征结果表明，假定的 Ce3+/Er3+/Eu3+ 活化 BLZO 荧光粉在白光发光二极管 (w-LED)、LFP 和交流技术的固态照明中具有潜在的应用价值。

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引用次数: 0

Multisite occupation mechanism and near-infrared luminescence characteristics of Cr3+ ions in Na-β"-Al2O3 Na-β"-Al2O3 中 Cr3+ 离子的多位占位机制和近红外发光特性

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-12 DOI: 10.1016/j.jlumin.2024.120986

Kenan Xu, Jing Wang, Zhongxiang Shi, Yanhua Sun, Xu Sun, Kexu Qian

Taking inspiration from multiple luminescence sources, Cr³⁺-doped Na-β"-Al₂O₃ fluorescent powder was synthesized through high-temperature solid-state method. The results show that Cr enters the Na-β"-Al₂O₃ lattice in the form of trivalent ions and occupies the Al³⁺ lattice within a limited concentration range. Phosphors are composed of submicrometer flake particles with good dispersion, and the concentration difference has little effect on the morphology and size of the particles. It is worth mentioning that by controlling the multisite occupation of Cr³⁺ in the matrix, spectral regulation can be realized in the near-infrared region, that is, the increase of Cr³⁺ concentration helps to broaden the emission peak at 709 nm (x = 0.13). Furthermore, the results of the energy transfer analysis show that there is energy transfer between Cr³⁺. More importantly, the band gap energy level provided by oxygen vacancies in the matrix leads to excellent thermal quenching resistance of the fluorescent powder between 378 and 428 K, and the luminescence intensity of the material can still maintain 60 % of that at room temperature when the temperature rises to 428 K. The phosphors with good microscopic morphology and thermal stability have application value in biological imaging, food safety detection, and other fields.

从多种发光源中汲取灵感，通过高温固态法合成了掺杂Cr3+的Na-β"-Al2O3荧光粉末。结果表明，Cr 以三价离子的形式进入 Na-β"-Al2O3 晶格，并在有限的浓度范围内占据 Al3+ 晶格。荧光粉由亚微米级的片状颗粒组成，具有良好的分散性，浓度差异对颗粒的形态和大小影响不大。值得一提的是，通过控制基质中 Cr3+ 的多位占位，可以实现近红外区域的光谱调节，即 Cr3+ 浓度的增加有助于拓宽 709 纳米（x = 0.13）处的发射峰。此外，能量传递分析结果表明，Cr3+ 之间存在能量传递。更重要的是，基体中氧空位提供的带隙能级使荧光粉在 378 至 428 K 之间具有优异的抗热淬性，当温度升至 428 K 时，材料的发光强度仍能保持室温下的 60%。

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引用次数: 0

Investigation of radiation-induced luminescence properties of high-density barium phosphate glasses doped with Ce3+ 掺杂 Ce3+ 的高密度磷酸钡玻璃的辐射诱导发光特性研究

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-09 DOI: 10.1016/j.jlumin.2024.120981

Amos Vincent Ntarisa , Sudipta Saha , Nguyen Duy Quang , W. Cheewasukhanont , Faizan Anjum , N. Intachai , Y. Ruangtaweep , H.J. Kim , S. Kothan , J. Kaewkhao

The Ce³⁺ doped barium-zinc-gadolinium-phosphate glass samples with composition 20BaCO₃-10ZnO-8Gd₂O₃-(62-

x

)P₂O₅-

x

CeBr₃ (where

x = 0.15, 0.25, 0.5

, and 0.75 mol.%) were fabricated by employing melt-quenching traditional method. The PXRD studies were performed to verify the amorphous form of the fabricated glasses. FE-SEM was utilised to check the particle size and shape of prepared samples. The measurements of EDS were employed to find out the elements available in the glasses. Wideband emission was observed in the 300–400 nm range in the obtained spectra under X-ray and UV–VIS excitations, revealing a 5d-4f transition of Ce³⁺-ions. The detected excitation bands found broad for prepared glasses include 4f electronic energy level transitions belonging to Gd³⁺ and the 5d electronic energy levels belonging to the Ce³⁺ excitation energy band situated at 308 nm. The scintillation property was investigated with α-particles and

γ

-rays excitations using ²⁴¹Am and ¹³⁷Cs, ²²Na radiation sources, respectively. The lifetime of the prepared glass samples was studied under 286 nm UV excitation and found 28.94 ± 0.12 ns as a short component and 166.47 ± 23.44 ns long component with 85 % and 15 % contributions, respectively for PBZG-0.25Ce glass sample.

采用熔淬传统方法制备了掺杂 Ce3+ 的磷酸钡锌钆玻璃样品，其成分为 20BaCO3-10ZnO-8Gd2O3-(62- x)P2O5-x CeBr3（其中 x=0.15,0.25,0.5 和 0.75 mol.%）。通过 PXRD 研究验证了所制备玻璃的无定形形式。利用 FE-SEM 检查制备样品的粒度和形状。利用 EDS 测量来找出玻璃中的元素。在 X 射线和 UV-VIS 激发下，获得的光谱在 300-400 纳米范围内观察到宽带发射，揭示了 Ce3+ 离子的 5d-4f 转变。在制备的玻璃中发现的宽激发带包括属于 Gd3+ 的 4f 电子能级跃迁和位于 308 纳米的属于 Ce3+ 激发能带的 5d 电子能级。利用 241Am 和 137Cs、22Na 辐射源分别对 α 粒子和 γ 射线激发的闪烁特性进行了研究。在 286 nm 紫外线激发下研究了制备的玻璃样品的寿命，发现 PBZG-0.25Ce 玻璃样品的短分量为 28.94 ± 0.12 ns，长分量为 166.47 ± 23.44 ns，分别占 85% 和 15%。

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引用次数: 0

Photoluminescence enhancement of 1,2,4-triaminobenzene molecules by modification with hydrolytically polycondensed 3-aminopropyltriethoxysilane 用水解缩聚的 3-aminopropyltriethoxysilane 对 1,2,4-三氨基苯分子进行改性，从而增强其光致发光性能

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-09 DOI: 10.1016/j.jlumin.2024.120980

Haowei Tan, Yoshiki Iso, Tetsuhiko Isobe

Small-molecule dyes with longer wavelength and higher photoluminescence quantum yield (PLQY) in water have attracted increasing attention due to their bright potential in fluorescence analysis technologies. Here, a red-emitting fluorescent dye of 1,2,4-triaminobenzene (TriAB) was modified with 3-aminopropyltriethoxysilane (APTES) to avoid contact with water molecules and to suppress fluorescence quenching due to O-H vibrations in water. The formation of a silica-like structure from hydrolytically polycondensed APTES was confirmed by X-ray diffractometry and Fourier-transform infrared absorption spectroscopy. Modification of TriAB with hydrolytically polycondensed APTES induced orange emission in the powder state, although TriAB powder did not exhibit any fluorescence before modification. The PLQY of APTES-modified TriAB in water was 11.1 %, which was higher than that of TriAB in water, 4.5 %. These results confirmed that the APTES derived silica-like matrix shielded TriAB from both water and intermolecular interactions with other TriAB molecules, overcoming fluorescence quenching.

在水中具有更长波长和更高光致发光量子产率（PLQY）的小分子染料因其在荧光分析技术中的巨大潜力而日益受到关注。在这里，用 3-aminopropyltriethoxysilane (APTES) 修饰了 1,2,4-三氨基苯（TriAB）红色发光荧光染料，以避免与水分子接触，并抑制水中 O-H 振动引起的荧光淬灭。X 射线衍射仪和傅立叶变换红外吸收光谱证实了水解缩聚 APTES 形成了类似二氧化硅的结构。用水解缩聚 APTES 对 TriAB 进行改性后，粉末状态下会发出橙色荧光，而在改性之前 TriAB 粉末并未发出任何荧光。APTES 改性后的 TriAB 在水中的 PLQY 为 11.1%，高于 TriAB 在水中的 4.5%。这些结果证实，APTES 衍生的类二氧化硅基质可屏蔽 TriAB 与水以及与其他 TriAB 分子之间的分子间相互作用，从而克服荧光淬灭。

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引用次数: 0

A dual channel NIR-fluorescence probe for simultaneous and independent sensing of SO2 and HSA 用于同时独立检测二氧化硫和氢氧化钠的双通道近红外荧光探头

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-09 DOI: 10.1016/j.jlumin.2024.120982

Akshay Kodiyawala, Arindam Mondal, Suban K. Sahoo, Subrata Dutta

To address the limitations of existing NIR-fluorescent probes that only detect either SO₂ or HSA individually, we have developed a NIR-fluorescent probe (AHN) capable of detecting both SO₂ and HSA independently and concurrently in PBS buffer (pH 7.4, 10 mM). AHN detects HSO₃⁻/SO₃²⁻ via nucleophilic addition to a carbon-carbon double bond and HSA via binding to a hydrophobic pocket of HSA. The probe emits distinct fluorescence signals to differentiate between SO₂ (λ_em = 488 nm) and HSA (λ_em = 720 nm). It also distinguishes between nucleophilic attacks by HSO₃⁻/SO₃²⁻ on free AHN probe (λ_em = 488 nm) and HSA-bound AHN (λ_em = 465 nm). The detection limits for SO₂ and HSA are 124 nM and 20.5 nM, respectively, and a detection limit of 22.4 nM for SO₂ in the presence of HSA. Drug competition studies reveal that AHN specifically targets the site-I of the HSA protein. The probe also successfully detects HSA in artificial urine and HSO₃⁻ in real samples, such as water, sugar, non-alcoholic wine, and biscuits. Furthermore, HSO₃⁻ can be detected by using simple cotton wool or filter paper.

现有的近红外荧光探针只能单独检测 SO₂或 HSA，为了解决这种探针的局限性，我们开发了一种近红外荧光探针（AHN），它能够在 PBS 缓冲液（pH 7.4，10 mM）中同时单独检测 SO₂ 和 HSA。AHN 通过亲核加成碳碳双键来检测 HSO₃-/SO₃2，通过与 HSA 的疏水口袋结合来检测 HSA。探针发出不同的荧光信号，以区分 SO₂（λem = 488 nm）和 HSA（λem = 720 nm）。它还能区分 HSO₃-/SO₃2- 对游离 AHN 探针的亲核攻击（λem = 488 nm）和与 HSA 结合的 AHN（λem = 465 nm）。SO₂ 和 HSA 的检测限分别为 124 nM 和 20.5 nM，SO₂ 在 HSA 存在下的检测限为 22.4 nM。药物竞争研究表明，AHN 特别针对 HSA 蛋白的 I 位点。该探针还能成功检测人工尿液中的 HSA 和实际样品（如水、糖、无酒精葡萄酒和饼干）中的 HSO₃-。此外，使用简单的棉絮或滤纸也能检测到 HSO3-。

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引用次数: 0

Unusual manganese luminescence channels in low doped MgAl2O4 低掺杂 MgAl2O4 中的异常锰发光通道

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-08 DOI: 10.1016/j.jlumin.2024.120970

Yurii Kazarinov , Jens W. Tomm , Andrey Prokhorov , Roman Minikayev , Jaroslaw Z. Domagala , Jevgenijs Gabrusenoks , Anatoli I. Popov , Ilias Shcherbakov , S. Orel , Karina Lamonova

We have done the rigorous characterizing of the Mn-doped MgAl₂O₄ (Mn = 0, 0.02, 0.04, 0.1 wt%) single crystals and the comprehensive analysis of their optical properties theoretically supported by the Modified Crystal Field Theory to obtain the most complete picture, to date, of the diverse absorption and luminescence behavior of MgAl₂O₄:Mn spinels. The study has focused on exploring the formation and coexistence of multivalent states of Mn and identifying the conditions needed for activating luminescence channels. We found that Mn takes the charge state +2, +3 and + 4 and occupies both tetrahedral and octahedral positions. Six luminescence channels related to Mn ions were identified for the first time. Two channels activate the luminescence at 520 nm: intra-atomic transitions in tetrahedral coordinated Mn²⁺ ions under VIS-excitation and a recombination Mn³⁺→Mn²⁺→Mn³⁺ process involving Mn³⁺ in tetrahedral positions under X-ray. Mn³⁺ in tetrahedrons and octahedrons activate luminescence channels at 733 and 926 nm under UV-C and VIS excitations. Two distinct processes involving Mn³⁺ and Mn⁴⁺ ions in octahedrons result in the luminescence at 651 nm. The first is an intra-atomic transition in the Mn⁴⁺ occurring under VIS-excitation. The second appears through a charge transfer Mn³⁺→Mn⁴⁺→Mn³⁺ in the octahedrons under UV-B-excitation.

我们对掺锰的 MgAl2O4（锰＝0、0.02、0.04、0.1 wt%）单晶进行了严格的表征，并在修正晶场理论的支持下对其光学性质进行了全面的理论分析，从而获得了迄今为止最完整的 MgAl2O4:Mn 尖晶石各种吸收和发光行为的图景。研究的重点是探索锰的多价态的形成和共存，并确定激活发光通道所需的条件。我们发现，锰的电荷状态为 +2、+3 和 +4，同时占据四面体和八面体位置。我们首次发现了与锰离子有关的六个发光通道。两个通道激活了 520 纳米波长处的发光：在 VIS 激发下，四面体配位 Mn2+ 离子的原子内跃迁；在 X 射线下，四面体位置上的 Mn3+ 参与了 Mn3+→Mn2+→Mn3+ 的重组过程。在 UV-C 和 VIS 激发下，四面体和八面体中的 Mn3+ 在 733 和 926 纳米波长处激活发光通道。涉及八面体中 Mn3+ 和 Mn4+ 离子的两个不同过程导致了 651 纳米波长的发光。第一个过程是 Mn4+ 在 VIS 激发下发生的原子内转变。第二种是在紫外线-B 的激发下，通过八面体中的电荷转移 Mn3+→Mn4+→Mn3+ 出现的。

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引用次数: 0

Impact of PEDOT:PSS/Ti3C2Tx composite hole transport layer on the performance of perovskite light emitting diodes PEDOT:PSS/Ti3C2Tx 复合空穴传输层对包晶石发光二极管性能的影响

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-07 DOI: 10.1016/j.jlumin.2024.120976

Hui Zhang , Zhenyang Wang , Zhixing Chen , Xingyue Zhang , Yuanming Zhou , Fei Mei

The two-dimensional transition metal carbide MXenes, often designated by Ti₃C₂T_x, have garnered significant interest on account of their distinctive optoelectronic characteristics. In this paper, PEDOT:PSS/Ti₃C₂T_x composite hole transport layer (HTLs) was prepared by adding the MXenes material Ti₃C₂T_x into PEDOT:PSS, and quasi-two-dimensional perovskite light-emitting diodes (PeLEDs) were fabricated and investigated. While the addition concentration of Ti₃C₂T_x was 0.25 mg/mL, the optimal device shows the maximum luminance of 6250 cd/m², and the current efficiency of 6.17 cd/A, which is 133 % and 112 % higher than the reference device without Ti₃C₂T_x, respectively. It is indicated that the additive incorporation of Ti₃C₂T_x in PEDOT:PSS can improve the efficiency of hole injection and conductivity of hole transport layer, and passivate the defects of perovskite film, thus enhancing the optoelectronic performance of PeLEDs. The findings of this study indicate that the PEDOT:PSS/Ti₃C₂T_x composite HTLs has considerable potential for application in PeLEDs.

二维过渡金属碳化物 MXenes（通常称为 Ti3C2Tx）因其独特的光电特性而备受关注。本文在 PEDOT:PSS 中加入 MXenes 材料 Ti3C2Tx，制备了 PEDOT:PSS/Ti3C2Tx 复合空穴传输层（HTLs），并制作和研究了准二维过氧化物发光二极管（PeLEDs）。当 Ti3C2Tx 的添加浓度为 0.25 mg/mL 时，最佳器件的最大亮度为 6250 cd/m2，电流效率为 6.17 cd/A，分别比不添加 Ti3C2Tx 的参考器件高出 133 % 和 112 %。这表明，在 PEDOT:PSS 中添加 Ti3C2Tx 可以提高空穴注入效率和空穴传输层的导电性，并钝化过氧化物薄膜的缺陷，从而提高 PeLED 的光电性能。本研究的结果表明，PEDOT:PSS/Ti3C2Tx 复合 HTL 在 PeLED 中具有相当大的应用潜力。

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引用次数: 0

AIE-active fluorescence emitters containing tetraphenylethylene and α-cyanostilbene with mechanochromism and photo-responsive behaviors 含有四苯基乙烯和α-氰基二苯乙烯的 AIE 活性荧光发射器，具有机械变色和光响应行为

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-06 DOI: 10.1016/j.jlumin.2024.120973

Haoyu Ma , Xiaoling Niu , Wenlong Qu , Yongliang Liu , Zhen Feng , Shengbo Zhu

Aggregation induced emission luminogens (AIEgens) as one of the optimal alternatives for designing stimuli-responsive fluorophores for real-life applications have sparked much current interest in smart materials design. Herein, the “Star molecules” in AIEgens of α-cyanostilbene and Tetraphenylethylene (TPE) derivatives were constructed into one molecular, namely DC-TPE-tBu and DC-TPE-CN. Both compounds exhibited significant AIE properties. Moreover, the two compounds could change their luminescent colors and intensities under the stimulation of external mechanical force and UV light, showing excellent mechanochromic luminescent (MCL) and remarkable photo-responsive behaviors, respectively. The stimuli responsive mechanisms were investigated by powder X-Ray diffractometer (PXRD) spectra and density functional theory calculations (DFT). The MLC behaviors were associated with the crystalline-to-amorphous transitions after mechanical grinding. These remarkable features make them suitable for the application of mechano/photo-sensors. The studies provide a useful strategy for developing AIE-active functional materials.

聚合诱导发射荧光团（AIEgens）作为设计刺激响应型荧光团的最佳替代品之一，在现实生活中的应用引发了当前智能材料设计领域的广泛关注。在本文中，α-氰基二苯乙烯和四苯基乙烯（TPE）衍生物 AIEgens 中的 "明星分子 "被构建成一个分子，即 DC-TPE-tBu 和 DC-TPE-CN。这两种化合物都具有明显的 AIE 特性。此外，这两种化合物在外部机械力和紫外光的刺激下可改变发光颜色和强度，分别表现出优异的机械变色发光（MCL）和显著的光响应行为。粉末 X 射线衍射仪（PXRD）光谱和密度泛函理论（DFT）计算研究了刺激响应机制。MLC 行为与机械研磨后晶体到非晶体的转变有关。这些显著特征使它们适合应用于机械/光电传感器。这些研究为开发 AIE 活性功能材料提供了有用的策略。

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引用次数: 0

Theoretical and experimental investigation of BaY2(MoO4)4:xSm3+ phosphors BaY2(MoO4)4:xSm3+ 荧光粉的理论和实验研究

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2024-11-06 DOI: 10.1016/j.jlumin.2024.120968

Weiguang Ran, Zicheng Zhang, Fukai Wang, Huixin Jiang, Yue Shao, Xiaoli Ma, Jiayi Geng, Tingjiang Yan

In this paper, the novel BaY₂(MoO₄)₄:xSm³⁺ phosphors with strong red emission and high thermal stabilization were prepared by a conventional method of high temperature solid state reaction in air atmosphere. Morphology, phase purity, element distribution, UV–Vis–NIR diffuse reflectance spectroscopy (DRS), and luminescence properties were investigated in detail. The crystal structure of the BaY₂(MoO₄)₄ host was refined with the aid of the Rietveld refinement method by the GSAS program. The electronic band structure and phonon dispersion were performed using plane-wave density functional theory (DFT). The prepared BaY₂(MoO₄)₄:Sm³⁺ phosphor exhibits excellent red emission under near-ultraviolet excitation. Strong red emission intensity and high thermal stability suggest potential application in backlighting or phosphor-covered white light-emitting diodes (pc-LEDs).

本文采用空气气氛下高温固态反应的传统方法制备了具有强红色发射和高热稳定性的新型 BaY2(MoO4)4:xSm3+ 荧光粉。详细研究了荧光粉的形态、相纯度、元素分布、紫外-可见-近红外漫反射光谱（DRS）和发光特性。借助 GSAS 程序中的里特维尔德精炼法，对 BaY2(MoO4)4 主晶的晶体结构进行了精炼。利用平面波密度泛函理论（DFT）对电子能带结构和声子色散进行了研究。制备的 BaY2(MoO4)4:Sm3+荧光粉在近紫外激发下具有优异的红色发射性能。较强的红色发射强度和较高的热稳定性表明，这种荧光粉有望应用于背光源或荧光粉包覆白光发光二极管（pc-LED）。

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