White light emission from an exciplex based on a phosphine oxide type electron transport compound in a bilayer device structure

被引：29

作者：

Zhao, Yan ^{[1
]}

Duan, Lian ^{[1
]}

Zhang, Xiao ^{[1
]}

Zhang, Deqiang ^{[1
]}

Qiao, Juan ^{[1
]}

Dong, Guifang ^{[1
]}

Wang, Liduo ^{[1
]}

Qiu, Yong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China

来源：

RSC ADVANCES | 2013年 / 3卷 / 44期

基金：

中国国家自然科学基金;

关键词：

ORGANIC ELECTROLUMINESCENT DEVICE; EMITTING-DIODES; INTERFACE; SINGLET; POLYMERS; EXCITONS;

D O I：

10.1039/c3ra43017k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A white organic light emitting diode (OLED) with a simple structure using exciplex emission is fabricated. The white emission of exciplex is formed at the interface between new electron transport material anthracene-9,10-diylbis(diphenylphosphine oxide) (DPPA) and hole transporting layer N,N'-bis (naphthalen-1-yl)-N,N'-bis(phenyl) benzidine (NPB). Pure white emission with Commission International de L'Eclariage (CIE) coordinates (0.33, 0.33) at the equal-energy white point is obtained. The phosphine oxide type material DPPA based OLEDs work well when Al is directly deposited on them, without an electron injection layer. In order to investigate the mechanism of electron injection from Al to DPPA, Xray photoelectron spectroscopy (XPS) measurements have been carried out and revealed that the improved electron injection is due to the existence of interaction between the phosphine oxide group of DPPA and Al at the DPPA/Al interface.

引用

页码：21453 / 21460

页数：8

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