OPTICAL SPECTROSCOPY OF TRIPLET EXCITONS AND CHARGED EXCITATIONS IN POLY(P-PHENYLENEVINYLENE) LIGHT-EMITTING-DIODES

被引：136

作者：

BROWN, AR ^{[1
]}

PICHLER, K ^{[1
]}

GREENHAM, NC ^{[1
]}

BRADLEY, DDC ^{[1
]}

FRIEND, RH ^{[1
]}

HOLMES, AB ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CHEM LAB,CAMBRIDGE CB2 1EW,ENGLAND

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 210卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(93)89100-V

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sub-gap optical absorption is measured under forward drive conditions in electroluminescent devices fabricated from thin films of poly(p-phenylenevinylene) sandwiched between electrodes of indium/tin oxide and calcium. Quantitative concentrations of excitations are obtained. Absorption seen at 1.37 eV is due to an allowed transition to a higher-lying state of the triplet excitons formed by capture of positive and negative charges in the polymer. Absorption bands at 0.65 and 1.55 eV are assigned to charged bipolarons which do not directly participate in the electroluminescence process.

引用

页码：61 / 66

页数：6

共 28 条

[1] LIGHT-INDUCED LUMINESCENCE QUENCHING IN PRECURSOR-ROUTE POLY(PARA-PHENYLENE VINYLENE) [J].