Exciton luminescence of ZnO fine particles

被引：19

作者：

Danhara, Y. ^{[1
]}

Hirai, T. ^{[2
]}

Harada, Y. ^{[3
]}

Ohno, N. ^{[1
,2
]}

机构：

[1] Osaka Electrocommun Univ, Div Elect & Appl Phys, Neyagawa, Osaka 5728530, Japan

[2] Osaka Electrocommun Univ, Acad Frontier Promot Ctr, Neyagawa, Osaka 5728530, Japan

[3] Osaka Inst Technol, Dept Appl Phys, Osaka 535, Japan

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 10 | 2006年 / 3卷 / 10期

关键词：

D O I：

10.1002/pssc.200672110

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Photoluminescence and time-resolved photoluminescence spectra of annealed ZnO fine particles with similar to 20 nm size have been investigated at 12 K. In unannealed raw ZnO particles, luminescence bands attributed to free-exciton recombination accompanied by LO phonon emission (LO phonon replica) are dominant in the band-edge luminescence. For annealed ZnO particles, the intensities of the LO phonon replica become weaker than that of bound exciton band, and the bandwidths of the exciton bands become narrower with the annealing temperature. The time-resolved luminescence spectra have revealed that the decay times of bound and free excitons become longer for annealed particles. These facts suggest that ZnO particles are aggregated each other even at temperatures well below the melting point. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：3565 / +

页数：2

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