BLUE ELECTROLUMINESCENT DIODES UTILIZING BLENDS OF POLY(P-PHENYLPHENYLENE VINYLENE) IN POLY(9-VINYLCARBAZOLE)

被引：219

作者：

ZHANG, C

VONSEGGERN, H

PAKBAZ, K

KRAABEL, B

SCHMIDT, HW

HEEGER, AJ

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

[2] UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106

来源：

SYNTHETIC METALS | 1994年 / 62卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0379-6779(94)90196-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report blue light emission from diodes made from polymer blends composed of poly(p-phenylphenylene vinylene) (PPPV) in a hole-transporting polymer, poly(9-vinylcarbazole) (PVK). The soluble PPPV and PVK allow fabrication of light-emitting diodes (LEDs) by spin-casting the electroluminescent polymer blend from solution at room temperature with no subsequent processing or heat treatment required. The initial devices utilized calcium as the electron-injecting (rectifying) contact on the front surface of a PPPV/PVK film spin-cast onto a glass substrate partially coated with a layer of indium/tin oxide (ITO) as the hole-injecting contact. The LEDs turn on at approximately 30 V and have a peak emission wavelength in the blue at 495 nm (at room temperature). The quantum efficiency is measured as a function of PPPV content in the blend; the maximum efficiency is approximately 0.16% photons/electron at a concentration of only 2% PPPV in PVK.

引用

收藏

页码：35 / 40

页数：6

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