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http://dx.doi.org/10.21218/CPR.2016.4.1.016

Characterization of the Cu-layer deposition time on Cu2ZnSnS4 (CZTS) Thin Film Solar Cells Fabricated by Electro-deposition  

Kim, Yoon Jin (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
Kim, In Young (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
Gang, Myeng Gil (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
Moon, Jong Ha (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
Kim, Jin Hyeok (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
Publication Information
Current Photovoltaic Research / v.4, no.1, 2016 , pp. 16-20 More about this Journal
Abstract
$Cu_2ZnSnS_4$ (CZTS) thin films were fabricated by successive electrodeposition of layers of precursor elements followed by sulfurization of an electrodeposited Cu-Zn-Sn precursor. In order to improve quality of the CZTS films, we tried to optimize the deposition condition of absorber layers. In particular, I have conducted optimization experiments by changing the Cu-layer deposition time. The CZTS absorber layers were synthesized by different Cu-layer conditions ranging from 10 to 16 minutes. The sulfurization of Cu/Sn/Zn stacked metallic precursor thin films has been conducted in a graphite box using rapid thermal annealing (RTA). The structural, morphological, compositional, and optical properties of CZTS thin films were investigated using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, and X-ray Flourescenece Spectrometry (XRF). Especially, the CZTS TFSCs exhibits the best power conversion efficiency of 4.62% with $V_{oc}$ of 570 mV, $J_{sc}$ of $18.15mA/cm^2$ and FF of 45%. As the time of deposition of the Cu-layer to increasing, the properties were confirmed to be systematically changed. And we have been discussed in detail below.
Keywords
$Cu_2ZnSnS_4$ (CZTS); Electro-deposition; Cu-layer deposition time; Thin film solar cells;
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