White organic light-emitting diodes based on emission from DPVBi-doped 4,48-bis (2,28-diphenylvinyl)-1,18-biphenyl  

作　　者：SONG Rui-li XU Yuan-zhe CHEN Shu-fen SONG Ji-bin SONG Ji-cheng 

机构地区：[1]Northeast DIANLI University, JiLin 132012, China [2]National Laboratory of Integrated Optoelectronics, JILIN University, ChangChun 730072, China [3]PetroChina , JILIN Chemicals ＆ Marketing Company, Jil_in f 320 f 2 , China [4]PetroChina , JILIN Petrochemical Company, Refinery, JiLin 732072, China

出　　处：《Optoelectronics Letters》2006年第5期348-350,共3页光电子快报（英文版）

摘　　要：White organic light-emitting diodes were fabricated by using 4,48-bis （2,28-diphenylvinyl） -1,18-bi- phenyl （DPVBi） as a dopant with a structure of ITO/4,4＂-bisEN-（1-naphthyl-1-）-N-phenyl-amino]-bi- phenyl （NPB,50 nm）/NPB：DPVBi （molecular weight ratio 10 ; 1,30 nm）/tris-（8-hydroxyquinoline）a- luminum（AIq：, ,20 nm）/LiF（1 nm）/Al. A broad emissive band with four major peaks of 438,464,496 and 520 nm was obtained by electroluminescence spectra,of which 438 nm-,464 nm- and 520 nm-peak come from emission of NPB, DPVBi and AIq3, respectively,and 496 nm-one resulted from the emissive superposition of three materials above. The emission from DPVBi was attributed to the charge trapping from NPB. The emission region was transferred partly from AIq3 to DPVBi-doped NPB by introducing the dopant DPVBi,which leads to emission of DPVBi and an enhanced emission from NPB. The maxi- mum luminance and current efficiency were 4721 cd/m^2 at 22 V and 0.80 cd/A at 5V,respectively.

关 键 词：二极管 电致发光 光谱 掺杂 

分 类 号：TN312.8[电子电信—物理电子学]