ON THE ORIGIN OF VISIBLE PHOTOLUMINESCENCE IN NANOMETER-SIZE GE CRYSTALLITES

被引：241

作者：

KANEMITSU, Y ^{[1
]}

UTO, H ^{[1
]}

MASUMOTO, Y ^{[1
]}

MAEDA, Y ^{[1
]}

机构：

[1] HITACHI LTD,HITACHI RES LAB,HITACHI,IBARAKI 31912,JAPAN

来源：

APPLIED PHYSICS LETTERS | 1992年 / 61卷 / 18期

关键词：

D O I：

10.1063/1.108290

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the origin of visible photoluminescence of Ge nanocrystals in SiO2 glassy matrix. Spectroscopic analyses of Ge nanocrystals indicate that the room-temperature photoluminescence comes from Ge nanocrystals of diameter of 4 nm or less. High-resolution electron microscopic studies imply that the structure of Ge nanocrystals of diameter less-than-or-equal-to 4 nm differs from the diamond structure. These data suggest that new nanostructure crystalline Ge having a character of direct optical transition exhibits the visible photoluminescence.

引用

页码：2187 / 2189

页数：3

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