Exciton extraction in nanocrystal solar cells

被引：1
作者：
de Sousa, J. S. [1 ]
Farias, G. A. [1 ]
Costa Filho, R. N. [1 ]
机构：
[1] Univ Fed Ceara, Dept Fis, BR-60440554 Fortaleza, Ceara, Brazil
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2014年 / 125卷
关键词：
Excitons; Nanoaystals; Electronic transitions rate; QUANTUM DOTS; CARRIER MULTIPLICATION; EFFICIENCY; RECOMBINATION; GENERATION; DYNAMICS; DARK;
D O I：
10.1016/j.solmat.2014.02.022
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The efficiency of exciton extraction from nanocrystals is defined as the ratio of the number of extracted excitons to the number of absorbed photons. This efficiency is studied here based on a phenomenological model parameterized by recent experimental results in CdSe nanocrystals. Several possibilities of interplay among all possible electronic transition rates (Auger recombination, impact ionization, radiative recombination and electron-hole escape) are explored showing the possibility of obtaining efficiencies above 100% when multiple exciton generation processes are taken into account. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：54 / 58
页数：5
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