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化物为基础的电子选择性被动化接触器用于晶太阳能电池

Kun Gao¹, Chunfang Xing², Dacheng Xu¹

¹College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou, 215006, China.

Small (Weinheim an der Bergstrasse, Germany)

|February 17, 2024

概括

合金化物 (AlX) 为晶太阳能电池中被动接触提供了一个有希望的替代品,减少了寄生虫的吸收. 化 (AlF_x) 消极接触器实现了21%的功率转换效率,增强了稳定性.

科学领域:

材料科学材料科学材料科学
太阳能光伏发电是如何实现的
半导体设备半导体设备

背景情况:

在晶体 (c-Si) 太阳能电池中的常规化层被动接触器遭受寄生体吸收损失.
基于金属化合物的宽带间隙被动接触正在被探索作为减轻这些损失的替代方案.

研究的目的:

研究热蒸发化 (AlX) 作为c-Si太阳能电池的电子选择性被动接触物.
评估基于AlX的接触器在太阳能电池应用中的性能和稳定性.

主要方法:

通过热蒸发制造化 (AlX) 层.
对AlX/n型c-Si (n-Si) 异构接触物的表征,包括接触电阻的测量.
制造和测试的n-Si太阳能电池,包括基于AlX的被动接触,有或没有SiO₂介层和预.

主要成果:

达到了60.5mΩcm2 (AlClx/n-Si) 和38.4mΩcm2 (AlFx/n-Si) 的低接触电阻.
在概念验证太阳能电池中,已证明的功率转换效率 (PCE) 为19.1% (AlCl_x/Al) 和19.6% (AlF_x/Al).
在SiO₂/AlF_x/Al后接触时,获得了21%的显著PCE,显示出增强的电子选择性和被动化.
基于AlF_x的接触器表现出良好的热稳定性 (高达400°C) 和改善的长期环境稳定性.

结论:

合金化物 (AlX),特别是AlF_x,是c-Si太阳能电池的有效的电子选择性被动化接触物.
实施SiO₂介层和预 annealing 显著提高了AlX被动接触的性能.
基于AlF_x的被动化接触显示出未来高效和稳定的太阳能电池应用的巨大潜力.

关键词:

化是一种化.化的化是一种化.电子选择性接触器的电子选择性接触被动化接触接触方式太阳能电池是由太阳能电池组成的.

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