发光学报2016，Vol.37Issue(5)：548-555,8.DOI:10.3788/fgxb20163705.0548
Ir配合物染料调节有机发光二极管发光特性
Properties Adjustment for Organic Light-emitting Diodes by Doping Ir-complex Dyes
摘要
Abstract
Through doping different organic dyes in organic light-emitting diodes ( OLEDs) with the same structures, we hope to investigate the relationship between the energy gaps of the doped dyes and the emission wavelength of the devices, as well as to analyze the energy transfer mechanism in the system. The structure of the OLED is ITO/NPB/CBP∶dyes /TPBi/Mg∶Ag/Ag, and the doped organic dyes include Ir( MDQ) 2 ( acac) , Ir( ppy) 3 and Firpic. The three doped devices have almost the same threshold voltages and emit red, green and blue light, respectively. At an luminance of 100 cd/m2 , the green-light device doped Ir( ppy) 3 achieves the highest external quantum efficiency of 7. 64%. Meanwhile, the red-light device doped Ir(MDQ)2(acac) has the external quantum effi-ciency of 2. 75%, which is the lowest one among the three devices, while the blue-light one doped Firpic achieves an external efficiency of 5 . 65%. The differences of the emission wavelength and the external quantum efficiency of those devices are assigned to the difference of the energy gaps of the dyes. Further analysis also shows that energy transfer between the CBP and the dyes exists.关键词
有机染料/有机发光二极管/掺杂/能量转移Key words
organic dyes/organic light-emitting diode/doping/energy transfer分类
信息技术与安全科学引用本文复制引用
周思成,高景宣,马舒杨,赵思萌,吕京繁,田苗,张东东,赵欣如..Ir配合物染料调节有机发光二极管发光特性[J].发光学报,2016,37(5):548-555,8.基金项目
国家自然科学基金面上项目(60877026)资助 （60877026）
