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Thin films for silicon-based tandem photovoltaics 1=Energy 2=Solar Technology

用于硅基串联光伏发电的薄膜 1=能源 2=太阳能技术

基本信息

批准号：
2166291
负责人：
金额：
--
依托单位：
University of Warwick
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2166291
关键词：
Thin films silicon based tandem

项目摘要

More than 90% of photovoltaic solar cells are made from crystalline silicon, and this market share is increasing as worldwide installations approach the terawatt level. The best single-junction silicon cells have efficiencies of up to 26.7%, and record cells are closing in on silicon's maximum efficiency of 29.4%. This limit can be exceeded by depositing or mounting a wider bandgap semiconductor on top of the silicon-based solar cell to form a tandem configuration, which are capable of exceeding efficiencies of 35%. Such device architectures are very timely, and if successful will have a significant impact on global energy production through renewable sources.Much attention has focused on placing a variety of thin film semiconductors onto silicon (e.g. perovskites, CdTe, CIGS), but less attention has been paid on the interface with the silicon. This PhD project will address the fundamental science underpinning the interface between the silicon and the thin film semiconductor to accelerate the development of tandem cells. The aim is to develop ultra-thin passivation films (< 1 nm) using atomic layer deposition (ALD), which exhibit excellent thermal and electrical stability when applied to semiconductor surfaces. The objective will be to develop a fundamental understanding of the passivation mechanism at the atomic scale and how processes can be manipulated in order to achieve optimal long-term thermal and electrical properties. The films developed will then be applied in a range of contexts; mainly silicon photovoltaics (with a focus on tandems), but also on other applications such lithium ion battery anodes.

超过90%的光伏太阳能电池由晶体硅制成，随着全球安装量接近太瓦级，这一市场份额正在增加。最好的单结硅电池的效率高达26.7%，创纪录的电池正在接近硅的最高效率29.4%。可以通过在硅基太阳能电池的顶部上沉积或安装较宽带隙半导体以形成串联配置来超过该限制，该串联配置能够超过35%的效率。这种器件架构非常及时，如果成功将对通过可再生能源生产全球能源产生重大影响。许多注意力集中在将各种薄膜半导体（例如钙钛矿，CdTe，CIGS）置于硅上，但对与硅的界面关注较少。这个博士项目将解决基础科学支撑硅和薄膜半导体之间的界面，以加速串联电池的发展。其目的是使用原子层沉积（ALD）开发超薄钝化膜（< 1 nm），这些钝化膜在应用于半导体表面时表现出优异的热稳定性和电稳定性。目标是在原子尺度上对钝化机制以及如何操纵工艺以实现最佳的长期热和电气性能有一个基本的了解。然后，开发的薄膜将应用于一系列环境中;主要是硅光电池（重点是串联），但也用于其他应用，如锂离子电池阳极。