物理学报2011，Vol.60Issue(10)：579-584,6.
利用DPVBi插层提高蓝色荧光有机电致发光器件的效率
High-efficiency blue fluorescence organic light-emitting diodes with DPVBi inserted in the doping emmision layer
摘要
Abstract
We have fabricated high-efficiency blue fluorescence organic light-emitting diodes（OLEDs） with DPVBi inserted in the doping emmision layer（EML）.The OLEDs with a configuration of ITO/2T-NATA/NPB/DPVBi：DSA-ph（inserted with DPVBi thin layer）/Alq3/LiF/Al are fabricated,using 2T-NATA as hole injection layer,NPB as hole transport layer,DPVBi：DSA-ph as emission layer and Alq3 as electron transport layer,respectively.The DPVBi thin layer inserted in EML leads to an increase in device efficiency as a results of an improvement of the balanced carrier injection,which results in an efficient radiative recombination in the emission zone.In addition,DPVBi ability of hole blocking can also be another reason for the improvement on the luminous gain.Hence,high radiative recombination is expected to take place in DPVBi：DSA-ph emission layer.This high efficient recombination results in high brightness and enhanced efficiency in our OLEDs.By optimizing the location and the number of layers of DPVBi thin layer,a maximum current efficiency of 6.77 cd/A is achieved at a current density 6.84 mA/cm2,which is nearly 67.6% more than that of non-inserted device.At a luminance of 1000 cd/m2,the current efficiency of the optimizing device is 6.49 cd/A at 6.7 V with a CIE（0.179,0.317）.关键词
有机电致发光/荧光/蓝光/载流子平衡Key words
organic electroluminescence/fluorescence/blue light/charge balance分类
信息技术与安全科学引用本文复制引用
汪津,赵毅,谢文法,段羽,陈平,刘式墉..利用DPVBi插层提高蓝色荧光有机电致发光器件的效率[J].物理学报,2011,60(10):579-584,6.基金项目
国家重点基础研究发展计划 （）
国家自然科学基金重点项目（批准号：60937001）、国家自然科学基金 （）
吉林省自然科学基金（批准号：20101512）资助的课题 （）
