Tailoring of nanocrystal sizes in CdSe films prepared by chemical deposition

被引:42
作者
Trojánek, F
Cingolani, R
Cannoletta, D
Mikes, D
Nemec, P
Uhlírová, E
Rohovec, J
Maly, P
机构
[1] Charles Univ, Fac Math & Phys, CR-12116 Prague 2, Czech Republic
[2] Univ Lecce, INFM, Dept Ingn Innovaz, I-73100 Lecce, Italy
[3] Charles Univ, Fac Nat Sci, Prague 12843 2, Czech Republic
关键词
CdSe; semiconductor nanocrystals; chemical deposition; growth control;
D O I
10.1016/S0022-0248(99)00752-6
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
We report on the control of nanocrystal sizes in nanocrystalline films of CdSe prepared by chemical solution deposition. We studied the effect of growth duration, of the light illumination during the growth, and of subsequent heat treatment of the films. Nanocrystals with radii from 1.9 to 10 nm were prepared and characterized by transmission electron microscopy, X-ray diffraction, and optical photoluminescence and absorption spectroscopy. We have observed the cubic and hexagonal structure for small and large nanocrystals, respectively. We interpret the trap-related photoluminescence in nanocrystals in terms of recombination of a deeply trapped hole with an electron in an interior slate or in a shallow trap. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
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页码:695 / 700
页数:6
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