Journal
MATERIALS LETTERS
Volume 158, Issue -, Pages 58-61Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.05.036
Keywords
Solar cells; Spin-coating; Benign synthesis; CZTS; Power conversion efficiency
Funding
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government Ministry of Trade, Industry and Energy
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Fine quality Cu2ZnSnS4 (CZTS) thin films were prepared by a non-toxic, simple and economical sal-gel and spin-coating technique. The CZTS thin films were prepared on Molybdenum coated soda lime glass substrates. The films were annealed at three different temperatures viz. 525, 550 and 575 degrees C under H2S gas atmosphere to study the effect of annealing temperature on the morphological, structural, chemical, compositional, optical and photovoltaic properties of the CZTS thin films. The X-ray diffraction and Raman spectroscopy investigations on the CZTS thin films showed formation of the pure kesterite structure. The X-ray fluorescence studies demonstrated that all the CZTS thin films were nearly stoichiometric having Zn rich composition. All the annealed films were further subjected to fabrication of solar cells as an SLG/Mo/CZTS/CdS/i-ZnO/AZO/Al grid. The best solar cell showed a short-circuit current density of 14.57 mA/cm(2), open-circuit voltage of 513 my, fill factor of 40% and power conversion efficiency of 3.01% under air mass 1.5 (100 mW/cm(2)) illumination. (C) 2015 Elsevier B.V. All rights reserved.
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