摘要
实验合成了发光二极管(LED)用绿光荧光粉配合物Tb-磺基水杨酸(SSAH)十一烯酸(UA)。红外光谱表明配体与Tb成功发生配位;紫外光谱分析表明配合物的吸收主要来自配体的吸收;荧光光谱分析显示配合物在365nm的紫外光激发下,于543nm处发出强的特征绿光,这表明所合成的配合物可用于365nm波长紫外芯片的光致荧光粉;热重曲线可以看出配合物的起始分解温度在200℃附近,完全满足LED的工作温度;荧光寿命分析得出配合物的荧光寿命为1.413ms,量子效率ηs=42%;通过量子化学计算出配体的单重态与三重态能级,并对配合物发光机理进行了探讨分析。
The green light fluorescent powder of Tb-sulfosalicylic acid-undecylenic acid used in white light emitting diode （WLED） is synthesized. Infrared （IR） spectra show that the ligancls have coordinated with Tb （Ⅲ） ion successfully. Ultraviolet （UV）-vis adsorption spectra demonstate that the absorption of complexes mainly comes from the ligands absorption. Flurescence spectra suggest that the complex emits characteristic green light at 543 nm excited by 365 nm UV light. And this characteristic indicates that the complex can be used as photoluminescent phosphors of UV chips potentially. Thermogravimetric analysis manifests that the decomposition temperature of the complex is near 200 ℃ , meeting the requirement of working temperature of WLED well. The fluorescence lifetime of the complex is 1. 413 ms and the quantum yield reaches up to 42 %. Furthermore, the singlet and triplet energy levels of the ligands are calculated by quantum chemistry, and the luminous mechanism of the complex is explored.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2014年第5期197-203,共7页
Acta Optica Sinica
基金
长江学者与创新团队发展计划(IRT0972)
国家自然科学基金(51152001)
科技部国际科技合作与交流专项(2011DFA52290)
山西省自然科学基金(2013011013-2)
关键词
光电子学
荧光粉
配合物
能量传递
optoelectronics
phosphors
terbium-complex
energy transfer
