White organic light-emitting diodes based on emission from DPVBi-doped 4,48-bis (2,28-diphenylvinyl)-1, 18-biphenyl |
| |
Authors: | Rui-li Song Yuan-zhe Xu Shu-fen Chen Ji-bin Song and Ji-cheng Song |
| |
Affiliation: | (1) Northeast DIANLI University, 132012 JiLin, China;(2) National Laboratory of Integrated Optoelectronics, JILIN University, 130012 ChangChun, China;(3) PetroChina, JILIN Chemicals & Marketing Company, 132012 JiLin, China;(4) PetroChina, JILIN Petrochemical Company, Refinery, 132012 JiLin, China |
| |
Abstract: | White organic light-emitting diodes were fabricated by using 4, 48-bis (2, 28-diphenylvinyl)-1, 18-biphenyl (DPVBi) as a dopant
with a structure of ITO/4,4’-bisN-(1-naphthyl-1-)-N-phenyl-amino]-biphenyl (NPB, 50 nm)/NPB:DPVBi (molecular weight ratio
10:1,30 nm)/tris-(8-hydroxyquinoline)aluminum (Alq3, 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 Alq3, 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 Alq3 to DPVBi-doped NPB by introducing the dopant DPVBi, which leads to emission of DPVBi and an enhanced emission from NPB. The
maximum luminance and current efficiency were 4721 cd/m2 at 22 V and 0.80 cd/A at 5V, respectively. |
| |
Keywords: | CLC number" target="_blank">CLC number TN312+ 8 |
本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《光电子快报》浏览原始摘要信息 |
|
点击此处可从《光电子快报》下载全文 |
|