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Spin-Coated Uniform Sb2S3 Thin Films for Photovoltaic Applications by Solvent Engineering

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Spin-coated Sb2S3 inorganic semiconductor thin films are a good substitute for conventional Sb2S3 absorbers prepared by chemical bath deposition due to the ability to control antimony oxide defects and the simplicity of the spin-coating process. However, precise control of the morphology of the Sb2S3 thin films is crucial for optimizing the photovoltaic properties of inorganic–organic hybrid solar cells. In this work, we attempt to fabricate high-purity Sb2S3 thin films with a uniform morphology via solvent engineering. The compositional ratio and concentration of the precursor solutions containing SbCl3 and thiourea are varied, and the chemical composition and morphology of the spin-coated Sb2S3 thin films are investigated. The morphology of the Sb2S3 thin films is predominantly determined by the morphology of the precursor films, which are formed by a complex reaction between SbCl3 and thiourea after the spin-coating process. Controlling the complex reaction enables the fabrication of uniform Sb2S3 thin films using the spin-coating process. In order to evaluate the photovoltaic properties of the spin-coated Sb2S3 thin films, planar Sb2S3 solar cells comprised of Au/Poly-3-hexylthiophene/Sb2S3/bl-TiO2/FTO are fabricated, and the current–voltage characteristics of these solar cells are investigated.
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Keywords: MORPHOLOGY; SB2S3; SOLAR CELLS; SPIN COATING; THIN FILM

Document Type: Short Communication

Publication date: September 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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