Anomalous persistent photoconductivity in Cu2ZnSnS4 thin films and solar cells

被引：20
|
作者：
Abelenda, A. [1 ,2 ]
Sanchez, M. [2 ]
Ribeiro, G. M. [1 ]
Fernandes, P. A. [3 ,5 ,6 ]
Salome, P. M. P. [4 ]
da Cunha, A. F. [5 ,6 ]
Leitao, J. P. [5 ,6 ]
da Silva, M. I. N. [7 ]
Gonzalez, J. C. [1 ]
机构：
[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil
[2] Univ La Habana, Fac Fis, Havana 10400, Cuba
[3] Inst Politecn Porto, Inst Super Engn Porto, Dept Fis, P-4200072 Oporto, Portugal
[4] LaNaSC Lab Nanostruct Solar Cells, Int Iberian Nanotechnol Lab, P-4715330 Braga, Portugal
[5] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal
[6] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal
[7] Ctr Univ UNA, BR-31744007 Belo Horizonte, MG, Brazil
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2015年 / 137卷
关键词：
CZTS; Cu2ZnSnS4; PPC; Solar cells; Local potential fluctuations; SULFURIZATION TIME; RELAXATION; PHOTOLUMINESCENCE; SPECTROSCOPY; LAYERS;
D O I：
10.1016/j.solmat.2015.02.001
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：
A persistent photoconductivity effect (PPC) has been investigated. in Cu2ZnSnS4 thin films and solar cells as a function of temperature. An anomalous increase of the PPC decay time with temperature was observed in all samples. The PPC decay time activation energy was found to increase when temperature rises above a crossover value, and also to grow with the increase of the sulfurization temperature and pressure. Both the anomalous behavior of the PPC decay time and the existence of two different activation energies are explained in terms of local potential fluctuations in the band edges of CZTS. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：164 / 168
页数：5
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