首页> 外文会议>Compound semiconductors: thin-film photovoltaics, LEDs, and smart energy controls >Fabrication and Characterization of Low-Cost, Large-Area Spray Deposited Cu_2ZnSnS_4 Thin Films for Heterojunction Solar Cells
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Fabrication and Characterization of Low-Cost, Large-Area Spray Deposited Cu_2ZnSnS_4 Thin Films for Heterojunction Solar Cells

机译:用于异质结太阳能电池的低成本,大面积喷射沉积Cu_2ZnSnS_4薄膜的制备与表征

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Large-area Cu_2ZnSnS_4 (CZTS) thin films were deposited by low-cost spray pyrolysis technique on Mo-coated soda-lime glass (SLG) substrates at varied substrate temperatures of 563-703°K. Deposition conditions were optimized to obtain best quality films and effect of post deposition thermal processing of the as-deposited films under H_2S ambient were investigated. Structural, morphological, and compositional characterization of as-deposited and H_2S treated CZTS absorber layers were carried out by x-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDX). Optical and electrical properties were measured by UV-Vis spectroscopy, van der Pauw, and Hall-effect measurements. Films grown at ~360℃ substrate temperature showed superior optoelectronic properties, improved stoichiometry and smoother morphology compared to films grown at much higher or lower temperatures. Film properties were significantly improved after the H_2S processing. Our results show that large area high quality CZTS films can be fabricated by low-cost spray pyrolysis technique for high throughput commercial production of CZTS based heterojunction solar cells.
机译:通过低成本的喷雾热解技术,在563-703°K的不同衬底温度下,将Mo_2涂覆的钠钙玻璃(SLG)衬底上沉积大面积Cu_2ZnSnS_4(CZTS)薄膜。优化沉积条件以获得最佳质量的薄膜,并研究了在H_2S环境下沉积后薄膜的沉积后热处理的效果。通过X射线衍射(XRD),拉曼光谱,扫描电子显微镜(SEM)和能量色散X射线分析(EDX)对沉积和经H_2S处理的CZTS吸收层进行结构,形态和成分表征。光学和电学性质通过UV-Vis光谱,van der Pauw和霍尔效应测量进行测量。与在更高或更低的温度下生长的薄膜相比,在〜360℃的衬底温度下生长的薄膜显示出优异的光电性能,改进的化学计量比和更平滑的形态。 H_2S处理后,薄膜的性能得到明显改善。我们的结果表明,可以通过低成本喷雾热解技术制备大面积高质量CZTS膜,以实现基于CZTS的异质结太阳能电池的高产量商业生产。

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