| 基于CBP:BCzVB:Btp2Ir(acac)体系的白色有机电致发光器件色度飘移研究 |
| |
| 引用本文： | 张晓波,委福祥,刘向,朱文清,蒋雪茵,张志林.基于CBP:BCzVB:Btp2Ir(acac)体系的白色有机电致发光器件色度飘移研究[J].光学学报,2007,27(3):487-493. |
| |
| 作者姓名： | 张晓波 委福祥 刘向 朱文清 蒋雪茵 张志林 |
| |
| 作者单位： | 上海大学,嘉定校区材料科学与工程学院,上海,201800 |
| |
| 基金项目： | 国家973计划(2002CB613400)，国家自然科学基金(90201034,60477014,60577041)资助课题。 |
| |
| 摘 要： | 以苯乙烯类化合物BCzVB为蓝色荧光染料,以铱配合物Btp_2Ir(acac)为红色磷光染料,共掺杂到CBP基质中作为发光层,制备了白色有机电致发光器件,研究了该体系发光色度漂移的原因。器件在掺杂CBP:6?zVB: 0．2%Btp_2Ir(acac),在．驱动电流从4～200 mA/cm~2变化范围内,发光色坐标从(0．340,0．273)飘移到(0．308, 0．273),色坐标轻微蓝移。对器件发光光谱和亮度-电流密度曲线等分析表明:器件色度的轻微蓝移是由于CBP基质向Btp_2Ir(acac)掺杂剂完全的能量传递、荧光染料BCzVB向磷光染料Btp_2Ir(acac)不完全的能量传递等内在物理过程和磷光染料Btp_2Ir(acac)自身发光饱和等特性共同决定的。
|
| 关 键 词： | 光学材料 有机电致发光 色度漂移 能量传递 发光饱和 |
| 文章编号： | 0253-2239（2007）03-0487-7 |
| 收稿时间： | 2006/4/29 |
| 修稿时间： | 2006-04-29 |
Color-Coordinate Shift in White Organic Electroluminescent Device Based on CBP:BCzVB:Btp2 Ir(acac)Under Large Driving Currents |
| |
| Zhang Xiaobo,Wei Fuxiang,Liu Xiang,Zhu Wenqing,Jiang Xueyin,Zhang Zhilin.Color-Coordinate Shift in White Organic Electroluminescent Device Based on CBP:BCzVB:Btp2 Ir(acac)Under Large Driving Currents[J].Acta Optica Sinica,2007,27(3):487-493. |
| |
| Authors: | Zhang Xiaobo Wei Fuxiang Liu Xiang Zhu Wenqing Jiang Xueyin Zhang Zhilin |
| |
| Institution: | College of Material Science and Engineering, Jiading Campus, Shanghai University, Shanghai 201800 |
| |
| Abstract: | White organic electroluminescence devices (OLEDs) were fabricated,with BCzVB as blue luminescence dye and Btp_2 Ir(acac) as red phosphorescence dye doped into CBP substrate as the light-emitting layer.The reason for the system color-coordinate shift is explored.For the device with the doping mass fraction of 6% BCzVB and 0.2% Btp_2 Ir(acac),the color-coordinate shifts slightly from (0.340,0.273) to(0.308,0.273),when the driving current varies from 4 to 200 mA/cm~2.The reason of the slight blue shift is derived by the luminescence spectrum and luminance-current density curve.It is found that internal physical processes,such as the complete energy transfer from host CBP to dopant Btp_2 Ir(acac) and incomplete energy transfer from blue dye of BCzVB to red dye of Btp_2 Ir (acac),and luminesence saturation of phosphorescent dye of Btp_2 Ir(acac) determine the slight blue shift. |
| |
| Keywords: | optical material organic electroluminescence (OLED) color-coordinate shift energy transfer luminescence saturation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
