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一种新型结构的黄光有机电致发光器件
引用本文:马晨,王华,郝玉英,高志翔,周禾丰,许并社.一种新型结构的黄光有机电致发光器件[J].光谱学与光谱分析,2008,28(7):1479-1482.
作者姓名:马晨  王华  郝玉英  高志翔  周禾丰  许并社
作者单位:1. 太原理工大学新材料界面科学与工程教育部重点实验室,山西,太原,030024;太原理工大学材料科学与工程学院,山西,太原,030024
2. 太原理工大学理学院,山西,太原,030024
3. 太原理工大学理学院,山西,太原,030024;大同大学物理与电子科学学院,山西,大同,037009
基金项目:国家自然科学基金 , 国家自然科学基金 , 山西省自然科学基金 , 山西省科技攻关项目
摘    要:用有机荧光染料罗丹明B(Rhodamine B)作为掺杂剂,采用双量子阱结构制备了一种新型的黄光有机电致发光器件,器件结构及各层厚度为:ITO/CuPc(6nm)/NPB(20nm)/Alq3(3nm)/Alq3∶Rhodamine B(3nm)/Alq3(3nm)/Alq3∶Rhodamine B(3nm)/Alq3(30nm)/Liq(5nm)/Al(30nm)。研究发现Rhodamine B的掺杂浓度对该器件的发光亮度和发光效率有较大影响。当Rhodamine B的掺杂浓度为1.5wt%时,得到了最大电流效率1.526cd.A-1,最大发光亮度1309cd.m-2的黄光有机电致发光器件。由器件的电致光谱曲线,可以看到在发光层之间存在着Alq3向RhB传递能量的过程。由于量子阱的斯托克斯效应与RhB染料分子间的自极化作用,随着掺杂浓度的增加,λmax出现明显红移。

关 键 词:罗丹明B  双量子阱  掺杂  OLED

A Novel Yellow Organic Light-Emitting Device
MA Chen,WANG Hua,HAO Yu-ying,GAO Zhi-xiang,ZHOU He-feng,XU Bing-she.A Novel Yellow Organic Light-Emitting Device[J].Spectroscopy and Spectral Analysis,2008,28(7):1479-1482.
Authors:MA Chen  WANG Hua  HAO Yu-ying  GAO Zhi-xiang  ZHOU He-feng  XU Bing-she
Institution:Key Laboratory of Interface Science and Engineering and in Advanced Materials of Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China. machen06@163.com
Abstract:The fabrication of a novel organic yellow-light-emitting device using Rhodamine B as dopant with double quantum-well (DQW) structure was introduced in the present article. The structure and thickness of this device is ITO/CuPc (6 nm) /NPB (20 nm) /Alq3 (3 nm)/Alq3 : Rhodamine B (3 nm) /Alq3 (3 nm) /Al q3 : Rhodamine B(3 nm) /Alq3 (30 nm) /Liq (5 nm)/Al (30 nm). With the detailed investigation of electroluminescence of the novel organic yellow-light-emitting device, the authors found that the doping concentration of Rhodamine B (RhB) had a very big influence on luminance and efficiency of the organic yellow-light-emitting device. When doping concentration of Rhodamine B (RhB) was 1.5 wt%, the organic yellow-light-emitting device was obtained with the maximum current efficiency of 1.526 cd x A(-1) and the maximum luminance of 1 309 cd x m(-2). It can be seen from the EL spectra of the devices that there existed energy transferring from Alq3 to RhB in the organic light-emitting layers. When the doping concentration of RhB increased, lambda(max) of EL spectra redshifted obviously. The phenomenon was attributed to the Stokes effect of quantum wells and self-polarization of RhB dye molecules.
Keywords:Rhodamine B  Double quantum-well  Doping  OLED
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