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Chin. Phys. B, 2015, Vol. 24(5): 056805    DOI: 10.1088/1674-1056/24/5/056805

Effect of thermal pretreatment of metal precursor on the properties of Cu2ZnSnS4 films

Wang Weia, Shen Hong-Liea b, Jin Jia-Lea, Li Jin-Zea, Ma Yuec
a College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
b Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
c Eoplly New Energy Technology Co., Ltd, Nantong 226612, China

Zn/Sn/Cu (CZT) stacks were prepared by RF magnetron sputtering. The stacks were pretreated at different temperatures (200 ℃, 300 ℃, 350 ℃, and 400 ℃) for 0.5 h and then followed by sulfurization at 500 ℃ for 2 h. Then, the structures, morphologies, and optical properties of the as-obtained Cu2ZnSnS4 (CZTS) films were studied by x-ray diffraction (XRD), Raman spectroscopy, UV–Vis–NIR, scanning electron microscope (SEM), and energy-dispersive x-ray spectroscopy (EDX). The XRD and Raman spectroscopy results indicated that the sample pretreated at 350 ℃ had no secondary phase and good crystallization. At the same time, SEM confirmed that it had large and dense grains. According to the UV–Vis–NIR spectrum, the sample had an absorption coefficient larger than 104 cm-1 in the visible light range and a band gap close to 1.5 eV.

Keywords:  Cu2ZnSnS4 (CZTS) films      radio-frequency magnetron sputtering      metal precursor pretreatment     
Received:  16 August 2014      Published:  05 May 2015
PACS:  68.55.aj (Insulators)  
  81.15.Gh (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))  
  88.40.jj (Silicon solar cells)  

Project Project of Jiangsu Province, China (Grant No. BE2012103), and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

Corresponding Authors:  Shen Hong-Lie     E-mail:
About author:  68.55.aj; 81.15.Gh; 88.40.JJ

Cite this article: 

Wang Wei, Shen Hong-Lie, Jin Jia-Le, Li Jin-Ze, Ma Yue Effect of thermal pretreatment of metal precursor on the properties of Cu2ZnSnS4 films 2015 Chin. Phys. B 24 056805

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