Improvement of the conversion efficiency of as-deposited Bi2S3/PbS solar cells using a CeO2 buffer layer
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We evaluated the performance of CeO2 as a buffer layer for emerging thin-film solar cells. Thin films of CeO2 were deposited via spin coating on transparent conductive oxide (TCO) glass substrates. The photovoltaic parameters of open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF), and conversion efficiency of the reference samples increased from 134 mV, 4.14 mA/cm2, 0.26, and 0.14%25 to 254 mV, 14.74 mA/cm2, 0.34, and 1.27%25, respectively, by using the structure TCO/CeO2/Bi2S3/PbS. The crystallite size of the absorber layer (PbS) increased from 14 to 24 nm using a 130 nm CeO2 buffer layer. © 2018 Elsevier B.V.
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CeO2; Chalcogenides; Solar cell Buffer layers; Cerium oxide; Chalcogenides; Conductive films; Conversion efficiency; Crystallite size; Efficiency; Inorganic compounds; IV-VI semiconductors; Layered semiconductors; Lead compounds; Open circuit voltage; Oxide films; Solar cells; Spin glass; Substrates; Thin film solar cells; Thin films; Absorber layers; CeO2 buffer layers; Fill factor; Glass substrates; Photovoltaic parameters; Reference samples; Transparent conductive oxides; Bismuth compounds
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