Optical properties of γ-AgI nanocrystals synthesized in reverse micelles

被引：21

作者：

Vogelsang, H ^{[1
]}

Husberg, O ^{[1
]}

von der Osten, W ^{[1
]}

机构：

[1] Univ Gesamthsch Paderborn, Fachbereich Phys, D-33095 Paderborn, Germany

来源：

JOURNAL OF LUMINESCENCE | 2000年 / 86卷 / 02期

关键词：

gamma-AgI; direct exciton; nanocrystals; exciton confinement; resonant Raman scattering; LO phonon scattering;

D O I：

10.1016/S0022-2313(99)00603-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

AgI nanocrystals were synthesized in reverse micelles. From X-ray diffraction patterns the nanocrystals were found to exhibit predominantly a zincblende structure. The exciton absorption was blueshifted and inhomogeneously broadened due to spatial confinement and the particle size distribution. "Free" exciton luminescence was weak. Instead, in addition to donor-acceptor recombination, a strong LO multiphonon Raman scattering was observed under resonant excitation in the exciton absorption. An LO phonon energy of 15.4 meV was derived and the incoming and outgoing resonances with the exciton were investigated. All results were consistent with the case of weak exciton confinement. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：87 / 94

页数：8

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