合成Kesterite薄膜蒸发系统的有限元分析

Carlos Eduardo Rondón Almeyda, Mónica Andrea Botero Londoño, R. Ospina Ospina
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引用次数: 0

摘要

目前,科学界对具有Kesterite (Cu2ZnSnS4)型吸收层的薄膜太阳能电池很感兴趣,因为它们的理论效率大于32%。蒸发法合成凯斯特石的效率在实验室水平为11.6%。虽然这些都是很好的结果,但蒸发室的设计和电极的分布对于控制合成参数和在相应阶段蒸发每个前驱体是至关重要的。本项目寻求设计一个蒸发室,可以达到10-5 mbar的真空,增加沉积表面,避免每个前驱体在非对应阶段蒸发。最后一个目标是使用Comsol multiphysics r(授权产品)软件进行研究,通过分析热分布确定金属前体(锌、铜和锡)的适当配置。结果表明,前驱体的蒸发温度越低,系统中铜电极的高度越小。这是因为,高度越低,容器内的热量浓度越低。
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Finite Element Analysis of An Evaporation System to Synthesize Kesterite thin Films
Currently, there is an interest within the scientific community in thin-film solar cells with a Kesterite (Cu2ZnSnS4) type absorber layer, since they report a theoretical efficiency greater than 32 %. The synthesis of Kesterites by evaporation has allowed for efficiencies at the laboratory level of 11.6 %. Although these are good results, the design of the evaporation chamber and the distribution of the electrodes is essential to control synthesis parameters and evaporate each precursor in the corresponding stage. This project seeks to design an evaporation chamber that can achieve a vacuum of 10-5 mbar, increase the deposition surface and avoid each precursor evaporation in a non-corresponding stage. This last objective was studied using Comsol multiphysics R. (licensed product) software, with the adequate disposition of metallic precursors (zinc, copper, and tin) determined by analyzing heat distribution. It was concluded that the lower the evaporation temperature of the precursor, the smaller the height of the copper electrode in the system. This is because, with a lower height the concentration of heat in the container is lower.
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