Abstract
Carbon-free Cu2ZnSnS4 (CZTS) thin films were prepared via a simple spin-coating process based on a sol-gel precursor of methoxyethanol solution with metal salts and thiourea, followed by post-sulfurization. The sol-gel precursor solution was deposited onto molybdenum-coated glass substrates. The sulfurization process was carried out using a conventional furnace at 525°C for 60min in a nitrogen atmosphere with sulfur powder. The structural, morphological and compositional properties of as-sulfurized thin films were characterized using X-ray diffraction, Raman spectroscopy, scanning electron microscopy and Auger electron spectroscopy. Only a single coating of the precursor solution was applied to obtain uniform Zn-rich and Cu-poor CZTS films thicker than 1μm after post-annealing. The best solar cell fabricated with the as-prepared CZTS films of band gap energy ~1.37eV showed a short-circuit current density of 10.15mA/cm2, an open circuit voltage of 0.509V, a fill factor of 33.72% and a conversion efficiency of 1.74%.
Original language | English |
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Pages (from-to) | 662-669 |
Number of pages | 8 |
Journal | International Journal of Energy Research |
Volume | 40 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2016 Apr 1 |
Bibliographical note
Publisher Copyright:© 2016 John Wiley & Sons, Ltd.
Keywords
- 2-methoxyethanol
- CuZnSnS
- Single-coating
- Sol-gel process
- Thin film solar cell
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology