Fabrication and characterization of kesterite Cu2ZnSnS4 thin films deposited by electrostatic spray assisted vapour deposition method

被引:13
作者
Liu, J. P. [1 ]
Choy, K. L. [1 ,2 ]
Placidi, M. [2 ]
Lopez-Garcia, J. [2 ]
Saucedo, E.
Colombara, D. [3 ]
Robert, E. [3 ]
机构
[1] UCL, UCL Ctr Mat Discovery, London WC1H 0AJ, England
[2] IREC Catalonia Inst Energy Res, Barcelona 08930, Spain
[3] Univ Luxembourg, Lab Energy Mat, L-1511 Luxembourg, Luxembourg
来源
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2015年 / 212卷 / 01期
关键词
Cu2ZnSnS4; kesterites; solar cells; thin films; vapour deposition; SOLAR-CELLS; EVAPORATED PRECURSORS; SULFURIZATION; ABSORBER;
D O I
10.1002/pssa.201431374
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Most of the high efficiency kesterite solar cells are fabricated by vacuum or hydrazine- based solution methods which have drawbacks, such as high cost, high toxicity or explosivity. In our contribution, an alternative non- vacuum and environmental friendly deposition technology called electrostatic spray assisted vapour deposition (ESAVD) has been used for the cost- effective growth of Cu2ZnSnS4 (CZTS) thin films with well controlled structure and composition. CZTS films have been characterized using a combination of XRD, XPS, SEM- EDX, AFM, and Raman spectroscopy. The results demonstrated that adherent, uniform and homogeneous CZTS films without apparent secondary phases have been produced by ESAVD. The atomic ratios measured by EDX are Cu/(Zn + Sn) = 0.88 and Zn/Sn = 1.17, which are very close with the reported high efficiency solar cells and can be finely tuned by formulating the precursor. CZTS films exhibited a typical optical band gap of 1.53 eV from UV- Vis analysis. Cu2ZnSnS4 produced by the ESAVD are being optimized towards the fabrication of high efficiency photovoltaic devices. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码:135 / 139
页数:5
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