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Pawar Pravin S.,Neerugatti KrishnaRao Eswar,Heo Jaeyeong 한국물리학회 2021 Current Applied Physics Vol.21 No.-
SnS is a layered material that crystallizes in an orthorhombic structure. This hinders the formation of a dense, pinhole-free morphology. The present study demonstrated the deposition of SnS thin films on soda-lime glass (SLG) and SLG/Mo substrates by spin-coating approach. The developed films were subsequently applied for the fabrication of a thin-film solar cell. The effect of the annealing temperature on the structural, optical, and morphological properties of the deposited SnS films was analyzed. The precursor concentrations and the annealing temperature played a critical role in determining the phase composition and morphological characteristics of the SnS thin films. TFSC with SLG/Mo/SnS/CdS/i-ZnO/AZO/Al configuration was fabricated using the optimal precursor ratio, i.e., Sn:S = 1:1.2, and this device showed a photoconversion efficiency of 0.076%. The reasons for the poor performance of the device were addressed in detail, and the scope for future research to optimize the device performance was elucidated.
Effect of intrinsic ZnO thickness on the performance of SnS/CdS-based thin-film solar cells
Yadav Rahul Kumar,Pawar Pravin S.,Neerugatti KrishnaRao Eswar,Nandi Raju,조재유,허재영 한국물리학회 2021 Current Applied Physics Vol.31 No.-
Tin monosulfide (SnS) has promising properties as an absorber material for thin-film solar cells (TFSCs). SnS/ CdS-based TFSCs have the following device structure: SLG/Mo/SnS/CdS/i-ZnO/AZO/Al. The optimization of thickness of intrinsic zinc oxide (i-ZnO) for SnS-absorber layers and its impact on SnS/CdS heterojunction TFSCs has been investigated at different thicknesses ranging from 39 nm to 73 nm. With the increase in thickness of i- ZnO from 39 nm to 45 nm, the overall performance improved. The highest PCE of 3.50% (with VOC of 0.334 V, JSC of 18.9 mA cm 2, and FF of 55.5%) was observed for 45 nm-thick i-ZnO layers. Upon a further increase in the i-ZnO thickness to 73 nm, the device performance deteriorated, indicating that the optimum thickness of the i- ZnO is 45 nm. The device performances were analyzed comprehensively for different i-ZnO thicknesses.
Influence of sodium diffusion from substrates on performance of SnS/CdS thin-film solar cells
Cho, Jae Yu,Shin, Kyeongrok,Lee, Hyo Seok,Neerugatti, KrishnaRao Eswar,Heo, Jaeyeong The Royal Society of Chemistry 2019 Journal of Materials Chemistry A Vol.7 No.42
<P>The influence of Na doping in vapour-transport-deposited SnS thin-film solar cells (TFSCs) was investigated based on the choice of substrate, such as soda-lime glass (SLG) and Eagle XG glass, without an external supply of Na. Our results show that the quantity of Na not only impacts the growth orientation of SnS, but also varies the efficiencies from 2.66% to 2.93% for SLG- and Eagle XG-based SnS TFSCs, respectively.</P>