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Continuous Microreactor-Assisted Solution Deposition for Scalable Production of CdS Films

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Abstract
  • Solution deposition offers an attractive, low temperature option in the cost effective production of thin film solar cells. Continuous microreactor-assisted solution deposition (MASD) was used to produce nanocrystalline cadmium sulfide (CdS) films on fluorine doped tin oxide (FTO) coated glass substrates with excellent uniformity. We report a novel liquid coating technique using a ceramic rod to efficiently and uniformly apply reactive solution to large substrates (152 mm x 152 mm). This technique represents an inexpensive approach to utilize the MASD on the substrate for uniform growth of CdS films. Nano-crystalline CdS films have been produced from liquid phase at ~90 degrees C, with average thicknesses of 70 nm to 230 nm and with a 5 to 12% thickness variation. The CdS films produced were characterized by UV-Vis spectroscopy, transmission electron microscopy, and X-Ray diffraction to demonstrate their suitability to thin-film solar technology. (C) 2013 The Electrochemical Society. All rights reserved.
  • KEYWORDS: Precursor films, Growth, CUIN1 XGA(X)SE-2 based photovoltaic cells, Continuous flow microreactor, Kinetics, Solar cells, Cadmium sulfide films, Thin films, Telluride, Chemical bath deposition
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  • Ramprasad, S., Su, Y., Chang, C., Paul, B., & Palo, D. (2013). Continuous microreactor-assisted solution deposition for scalable production of CdS films. Ecs Journal of Solid State Science and Technology, 2(9), P333-P337. doi:10.1149/2.003309jss
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  • 2
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  • 9
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  • The work described herein was funded by the U.S. Department of Energy, Industrial Technologies Program, through award #NT08847, under contract DE-AC-05-RL01830 to PNNL. Additional funds were received from the Oregon Nanoscience and Microtechnologies Institute (ONAMI) under a matching grant to Oregon State University.
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