Carrier-Transport, Photoluminescence, and Electroluminescence Properties Comparison of a Series of Terbium Complexes with Different Structures
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- 作者：Hao Xin ; Mei Shi ; Xiao Mei Zhang ; Fu You Li ; Zu Qiang Bian ; K. Ibrahim ; Feng Qin Liu ; and Chun Hui Huang
- 刊名：Chemistry of Materials
- 出版年：2003
- 出版时间：September 23, 2003
- 年：2003
- 卷：15
- 期：19
- 页码：3728 - 3733
- 全文大小：108K
- 年卷期：v.15,no.19(September 23, 2003)
- ISSN：1520-5002
文摘
A series of terbium complexes with different structures revealed different carrier-transportand photophysical properties. Complex A [tris(1-phenyl-3-methyl-4-isobutyl-5-pyrazolone)-bis(triphenyl phosphine oxide), Tb(PMIP)3(TPPO)2] had overly strong electron-transportproperties, complex B [Tb(PMIP)3(EtOH)(H2O)] mainly revealed hole-transport properties,and complex C [tris(1-phenyl-3-methyl-4-(2-ethylbutyryl)-5-pyrazolone) triphenyl phosphineoxide, Tb(eb-PMP)3(TPPO)] showed both electron- and hole-transport properties. Their PLintensity ratio was A-B-C = 2.6:1:1.2. The eletroluminescence (EL) performances (brightness and peak power efficiency) achieved from complexes A, B, and C were 9600 cd/m2 and5.21 lm/W, 2800 cd/m2 and 2.61 lm/W, and 12000 cd/m2 and 11.3 lm/W, from deviceconfigurations of ITO/TPD-B-A-AlQ-Mg0.9Ag0.1-Ag (20:20:50:30:200:80 nm), ITO/TPD-B-BCP-AlQ-Mg0.9Ag0.1)-Ag (40:30:20:20:200:80 nm), and ITO/NPB-C-BCP-AlQ-Mg0.9Ag0.1-Ag (10:50:20:40:200:80 nm), respectively. Results indicated that for a given terbiumcomplex, balanced carrier injection and a well-confined recombination zone are crucial toobtaining maximum EL performance. More important, if this premise is satisfied, for differentcomplexes, the higher the PL quantum yield the complex shows, the greatly improved theEL performance will be.