(t-bt)2Ir(acac)新型磷光染料的光谱特性及电致发光性能研究  

Electroluminescent Performance and Spectral Characteristics of a Novel(t-bt)_2Ir(acac) Phosphorescent Iridium Complex

作　　者：赵娟[1] 于军胜[1] 文雯[1] 蒋亚东[1] 

机构地区：[1]电子科技大学光电信息学院,电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《光谱学与光谱分析》2011年第5期1189-1192,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金创新群体项目(60721001),国家自然科学基金项目(60736005,60425101-1);(863计划)项目(2007AA03Z424);教育部新世纪优秀人才基金项目(NCET-06-0812),教育部留学归国基金项目(GGRYJJ08-05),教育部博士点基金项目(20090185110020)资助;四川省青年基金项目(09ZQ026-074);部级基金项目(9140A02060609DZ0208)

摘　　要：对不同浓度的新型黄色铱配合物磷光染料bis[2-(4-tertbutylphenyl)benzothiazolato-N,C2]′iridium(acetylacetonate)[(t-bt)2Ir(acac)]溶液和薄膜状态下的光致发光光谱(Photoluminescence,PL)和紫外-可见吸收(UV-Vis absorption)光谱进行了表征。结果表明,溶液浓度为3×10-4mol.L-1时的PL发光最强,浓度猝灭效应使得高浓度溶液的PL强度降低。薄膜的PL和吸收光谱相对溶液的光谱都发生了红移,这是由于固态时分子间距小、相互作用大,分子表现为聚集态的结果。基于光谱特性,制备了(t-bt)2Ir(acac)超薄层结构的电致发光器件,在13.2 V的偏置电压下,器件的发光亮度达到18 367 cd.m-2。The photoluminescence（PL） spectra and UV-Visible absorption spectra of a novel yellow phosphor dye of bis[2-（4-tert-butylphenyl）benzothiazolato-N,C2′] iridium（acetylacetonate） denoted as（t-bt）2Ir（acac） were systematically investigated,which were measured in solution and film states with various concentrations.The results showed that the highest PL intensity was achieved when the solution concentration was 3×10-4 mol·L-1,and it decreased dramatically when the concentration kept on increasing because of concentration quenching of the phosphor dye.A red shift for PL spectra and UV-Vis absorption spectra of films compared to those of solutions were found,which is due to the shorter distance,aggregation effect,and stronger interaction of dye molecules in solid state.Based on the spectrum characterization,organic light-emitting diode was fabricated with an ultrathin structure based on this phosphor dye,which showed a high luminescence of 18 367 cd·m-2 at a bias of 13.2 V.

关 键 词：有机电致发光 磷光染料 光致发光光谱 紫外吸收光谱 

分 类 号：N383.1[自然科学总论]