The Origins of Photoluminescence Peaks in ZnO Nanocrystals Revealed by Microscopic Photoluminescence Imaging Spectroscopy

被引：2

作者：

Yamamoto, Aishi ^{[1
]}

Satake, Yasuhiko ^{[1
]}

Atsuta, Satoshi ^{[1
]}

Taguchi, Yuko ^{[1
]}

Ishizumi, Atsushi ^{[1
]}

机构：

[1] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300192, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 05期

关键词：

photoluminescence; ZnO; nanocrystals; microscopic photoluminescence spectroscopy; excitons; bound excitons; nanocrystal aggregation; CHEMICAL-VAPOR-DEPOSITION; ROOM-TEMPERATURE; THIN-FILMS; OPTICAL-PROPERTIES; QUANTUM DOTS; LUMINESCENCE; EPITAXY;

D O I：

10.1143/JPSJ.79.054701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the origins of photoluminescence (PL) peaks in ZnO nanocrystals (NCs) dispersed in glass films as determined using microscopic PL imaging spectroscopy. In macroscopic PL spectra, three main peaks were observed at low temperatures. When NC density in the films was decreased, two of the peaks were diminished, leaving only one dominant PL peak. Furthermore, only this PL peak was observed for isolated single NCs in the microscopic space-resolved PL spectra. The observed PL peaks were attributed to two origins: the intrinsic electronic state in isolated individual NCs, and the localized electronic states at the interface between aggregated NCs.

引用

页数：4

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