ELECTROMODULATED ABSORPTION-SPECTROSCOPY OF CHARGE-CARRIERS IN ALPHA-SEXITHIOPHENE THIN-FILMS

被引：17

作者：

CHARRA, F ^{[1
]}

LAVIE, MP ^{[1
]}

LORIN, A ^{[1
]}

FICHOU, D ^{[1
]}

机构：

[1] CNRS,UPR 241,MAT MOLEC LAB,F-94320 THIAIS,FRANCE

来源：

SYNTHETIC METALS | 1994年 / 65卷 / 01期

关键词：

SPECTROSCOPY; SEXITHIOPHENE; FILMS;

D O I：

10.1016/0379-6779(94)90287-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have realized two types of metal-insulator-semiconductor devices with alpha-sexithiophene as the semiconductor: one with a polymeric insulator and one with a mineral one. Both electromodulated absorption spectra present a sharp peak at 1.50 eV, corresponding to an absorption cross section of 4 X 10(-17) cm2 per injected charge (epsilon = 10(4) 1 mol-1 cm-1). By comparison with chemical-doping experiments we show that, in both devices, the charges are stored as radical cations (model polarons). The quantitative results are discussed with the help of a precise optical model of the multilayer structure.

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收藏

页码：13 / 17

页数：5

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