Fabrication of Three-Dimensional-Structure Solar Cell with Cu2ZnSnS4
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概要
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We fabricated three-dimensional (3D)-structure solar cells with Cu2ZnSnS4 (CZTS). A CdS buffer layer was deposited around nc-TiO2 by the chemical bath deposition (CBD) method. The CdS deposition time was varied from 5 to 30 min at 65 °C. CZTS absorber was deposited by spray pyrolysis deposition (SPD) onto the CdS buffer layer. Cu-, Zn-, Sn-, and S-containing solutions were used in SPD. The metal sources of copper(II) acetate monohydrate, zinc(II) acetate dehydrate, and tin(II) chloride dehydrate, and pure sulfur powder were desolved in N,N-dimethylformamide (DMF) as a solvent and mono-ethanolamine as a stabilizer. The solution-sprayed 3D-structure substrate was annealed in a nitrogen atmosphere at 250 °C for 30 min. A 3D-structure CZTS solar cell presented the best conversion efficiency \eta of 0.51% with a CdS buffer layer deposition time of 20 min. The dependence of each solar cell characteristic on CdS buffer layer deposition time was measured.
- 2012-10-25
著者
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Uchiki Hisao
Department Of Electrical Engineering Nagaoka University Of Technology
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Tanaka Kunihiko
Department Of Astrophysics Nagoya University
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Moriya Katsuhiko
Department of Electrical and Electronic Engineering, Tsuruoka National College of Technology, Tsuruoka, Yamagata 997-8511, Japan
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Kurokawa Masato
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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