Synthesis and Characterizations of Novel bi-ligand TbEu(cpioa)phen Phosphors with High Quantum Efficiency for WLED Applications.

IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Journal of Fluorescence Pub Date : 2024-09-25 DOI:10.1007/s10895-024-03927-y
Qianwei Wang, Qi Wu, Jinhu Guo, Xinyu Yang, Mengxuan Fang, Jiaoying Wang, Minghui Tai, Yichong Cheng, Dalai Jin, Longcheng Wang
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Abstract

The hydrothermal method was employed to synthesize a novel bi-ligands LnMOF: Ln(cpioa)phen. The secondary ligand 1, 10-phen serves as a bridging agent to further facilitate energy transfer between Ln ions and the primary ligand H3cpioa. A comparison between Ln(cpioa) MOFs (Ln: Tb3+, Eu3+) and Ln(cpioa)phen MOFs (Ln: Tb3+, Eu3+) reveals that addition of the secondary ligand significantly improves the emission intensity by as high as almost 34 times. After detailed structural study, it is found that different Ln ions have the similar coordination in the Ln(cpioa)phen MOF. In addition, the chromaticity of Ln(cpioa)phen MOFs can be easily tuned by the amounts of doping Ln ions. La0.974Tb0.0255Eu0.0005(cpioa)phen MOF has a white emission with a CIE coordinate of (0.323, 0.343). Characterizations of corresponding LED devices show that device based on Ln(cpioa)phen MOF has better photoluminescence performances, which indicates that Ln(cpioa)phen MOF has great potential of for WLED applications.

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用于 WLED 应用的具有高量子效率的新型双配体 TbEu(cpioa)phen 荧光的合成与表征。
采用水热法合成了新型双配体 LnMOF:Ln(cpioa)phen。次配体 1,10-phen 可作为桥接剂,进一步促进 Ln 离子与主配体 H3cpioa 之间的能量转移。对 Ln(cpioa) MOFs(Ln:Tb3+、Eu3+)和 Ln(cpioa)phen MOFs(Ln:Tb3+、Eu3+)进行比较后发现,加入次配体后,发射强度显著提高了近 34 倍。经过详细的结构研究发现,不同的 Ln 离子在 Ln(cpioa)phen MOF 中具有相似的配位。此外,Ln(cpioa)phen MOFs 的色度可通过掺杂 Ln 离子的数量轻松调节。La0.974Tb0.0255Eu0.0005(cpioa)phen MOF 具有 CIE 坐标为 (0.323, 0.343) 的白色发射。相应 LED 器件的表征结果表明,基于 Ln(cpioa)phen MOF 的器件具有更好的光致发光性能,这表明 Ln(cpioa)phen MOF 在 WLED 应用方面具有巨大的潜力。
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来源期刊
Journal of Fluorescence
Journal of Fluorescence 化学-分析化学
CiteScore
4.60
自引率
7.40%
发文量
203
审稿时长
5.4 months
期刊介绍: Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.
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