PHOTOCHEMISTRY OF SEMICONDUCTOR COLLOIDS .36. FLUORESCENCE INVESTIGATIONS ON THE NATURE OF ELECTRON AND HOLE TRAPS IN Q-SIZED COLLOIDAL CDS PARTICLES

被引：172

作者：

EYCHMULLER, A

HASSELBARTH, A

KATSIKAS, L

WELLER, H

机构：

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1991年 / 95卷 / 01期

关键词：

COLLOIDES; FLUORESCENCE; PHOTOCHEMISTRY; SEMICONDUTORS; SURFACES;

D O I：

10.1002/bbpc.19910950115

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：

The fluorescence properties of surface modified quantum-sized CdS colloids were investigated by means of static and time-resolved low temperature fluorescence spectroscopy. All samples investigated had high fluorescence quantum yields already at room temperature and exhibited either exclusively excitonic or a mixture of excitonic and trapped fluorescence. Mechanisms are presented which explain both the static and time-resolved behaviour of both the excitonic and trapped fluorescence. The excitonic fluorescence is described as delayed fluorescence occuring by detrapping of electrons. Extremely shallow traps having trap depths of a few meV are discussed.

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页码：79 / 84

页数：6

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