Surface transformation and photoinduced recovery in CdSe nanocrystals

被引：98
|
作者：
Hess, BC [1 ]
Okhrimenko, IG [1 ]
Davis, RC [1 ]
Stevens, BC [1 ]
Schulzke, QA [1 ]
Wright, KC [1 ]
Bass, CD [1 ]
Evans, CD [1 ]
Summers, SL [1 ]
机构：
[1] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84062 USA
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.86.3132
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
CdSe nanocrystals in solution and films can enter a metastable state in which the highly luminescent nanocrystals become dark. This change, which we attribute to a surface transformation, can be caused by heating or by changing the environment of the nanocrystals at room temperature. The metastable transformation is reversed upon illumination of above-band-gap light, at which point the nanocrystals are again highly luminescent.
引用
收藏
页码：3132 / 3135
页数：4
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