TIME-RESOLVED SPECTROSCOPY OF SPONTANEOUS LUMINESCENCE OF CDSSE1-X QUANTUM DOTS

被引：13

作者：

BUGAYEV, A ^{[1
]}

KALT, H ^{[1
]}

KUHL, J ^{[1
]}

RINKER, M ^{[1
]}

机构：

[1] AF IOFFE PHYSICOTECH INST,LENINGRAD 194021,USSR

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1991年 / 53卷 / 01期

关键词：

D O I：

10.1007/BF00323438

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Picosecond time-resolved spectroscopy of the edge luminescence band of CdS(x)Se1-x quantum dots with crystallite diameters as small as a few nanometers under band-to-band excitation reveals strong enhancement of the radiative recombination rate compared to bulk CdS owing to quantum confinement. The splitting of the luminescence band into two lines originates from near-band-gap absorption. Analysis of the temperature as well as the spectral dependence of the decay time (leading to a red shift of the luminescence with increasing time) and of the total-light-decay law result in a new model for the dominant radiative recombination channel: donor-acceptor pair recombination instead of an excitonic mechanism as claimed in previous publications.

引用

页码：75 / 80

页数：6

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