Role of thermal treatment on the luminescence properties of CdTe thin films for photovoltaic applications

被引：20

作者：

Armani, N.

Salviati, G.

Nasi, L.

Bosio, A.

Mazzamuto, S.

Romeo, N.

机构：

[1] CNR, IMEM Inst, I-43010 Parma, Italy

[2] Univ Parma, Dept Phys, I-43100 Parma, Italy

来源：

THIN SOLID FILMS | 2007年 / 515卷 / 15期

关键词：

solar cells; cadmium telluride; annealing; luminescence; chlorine;

D O I：

10.1016/j.tsf.2006.12.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The efficiency of CdTe based solar cells is strongly enhanced by a thermal treatment in HCF2Cl ambient. CdTe thin films deposited on CdS/ ZnO/ITO/glass by Closed Space Sublimation before and after the annealing are characterised. The CdTe morphology is studied by atomic force microscopy and scanning electron microscopy. In the treated films the non-homogeneous distribution of the grain size disappears, in addition an increasing of the dimensions of the grains is observed. Cathodoluminescence analyses show a remarkable difference in the spectra between the treated and untreated structures. A strong increase in the intensity of the 1.4 eV band is observed by increasing the HCF2Cl content. A model of the electronic levels inside the CdTe band gap, due to incorporation of Cl (or F) is proposed. (C) 2007 Elsevier B.V All rights reserved.

引用

页码：6184 / 6187

页数：4

共 14 条

[1]

[Anonymous], 2001, Proceedings of the 17th European Photovoltaic Solar Energy Conference

[2] Study of the radiative mechanism of the 1.471-eV luminescent band in polycrystalline CdTe films [J].