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Electrical and Optical Properties of Cu2ZnSnS4 Films with Different Chemical Composition

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In this study, the Cu2ZnSnS4 (CZTS) films were grown by a two-step process using new ZnSn/Cu stacked precursors that were prepared by sputtering and subsequently annealed at 570 °C under a sulfur atmosphere. By controlling the composition ratio of the CZTS films, we increased the photocurrent of the CZTS thin-film solar cell employing the stacked bi-layer from 13.9 mA/cm2 to 19.5 mA/cm2 and increased the solar cell's efficiency from 3.9% to 5.3%. These increases are attributed to the formation of a Cu-poor CZTS film that resulted in increased formation of copper vacancies that give rise to shallow acceptors in the CZTS.
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Keywords: PHOTOVOLTAIC DEVICE; SOLAR CELL; THIN FILM

Document Type: Research Article

Publication date: February 1, 2015

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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