一种新型稀土配合物Tb(m-benzoicacid)_3的发光特性的研究  

Luminescence Properties of A New Kind of Rare Earth Complexes Tb(m-benzoicacid)_3

作　　者：刘峻峰[1] 滕枫[1] 徐征[1] 侯延冰[1] 李勇[2] 徐怡庄[2] 吴瑾光[2] 

机构地区：[1]北京交通大学光电子技术研究所 [2]北京大学稀土材料化学及应用国家重点实验室,北京100871

出　　处：《光谱学与光谱分析》2004年第5期519-523,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(90301004);北京市自然科学基金(2032015)资助项目

摘　　要：研究了一种新型稀土配合物发光材料 ,对苯甲酸铽Tb(m benzoicacid) 3 的发光特性。以这种材料为掺杂剂 ,聚乙烯咔唑 (PVK)为基质材料制备了薄膜器件。通过对光谱的研究 ,发现在掺杂体系中 ,PVK与Tb(m benzoicacid) 3 之间存在有效的能量传递 ,能量传递效率与铽配合物的掺杂浓度有关 ,随着Tb配合物的掺杂浓度的增加 ,Tb的特征发光在掺杂体系中所占比重也相应增加 ,而PVK的发光相对明显减弱 ,当Tb(m benzoicacid) 3 :PVK的质量比高于 2 0 %时 ,整个体系的发光变为以Tb的发光为主 ,而PVK的发光基本猝灭了。以PVK :Tb(m benzoicacid) 3 掺杂体系为发光层 ,八羟基喹啉铝 (Alq)为电子传输层 ,制备了双层电致发光器件 ,器件的结构为ITO/PVK :Tb(m benzoicacid) 3 /Alq/LiF/Al,该器件的电致发光为三价铽离子的特征发光 ,在 2 1V的电压下 ,亮度可达 311nt。The luminescence properties of a new kind of rare earth complex Tb (m-benzoicacid)(3) were studied. With the new complex as the dopant and PVK as the host, the film of the mixed system was made, from whose spectra the authors learned that a highly efficient energy transfer process exists. The energy transfer is related to the mass proportion, and the more the mass proportion of Tb in the doped system, the more the emission proportion, and at the same time the emission of PVK is relatively weak. When the mass proportion of Tb(m-benzoicacid)(3): PVK is higher than 20%, the emission of Tb is stronger than that of PVK, and plays the main role, while the emission of PVK disappears. The authors used the PVK: Tb(m-benzoicacid)(3) system as the emission layer and Alq as the electron-transfer layer, thus the device, whose structure is ITO/PVK:Tb(m-benzoicacid)(3)/Alq/LiF/Al was formed. From the spectrum of this device, the characteristic emission of Tb can be observed. At the bias voltage of 21 V, a brightness 311 cd(.)m(-2) was achieved.

关 键 词：稀土配合物 发光特性 苯甲酸铽 电致发光 能量传递 

分 类 号：TN383.1[电子电信—物理电子学]