Recovery Mechanisms in Aged Kesterite Solar Cells.
Recovery Mechanisms in Aged Kesterite Solar Cells.
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DOI：
10.1021/acsaem.1c03247
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发表时间：
2022-05-23
影响因子：
6.4
通讯作者：
Qu, Yongtao
中科院分区：
文献类型：
--
作者：
Campbell, Stephen;Duchamp, Martial;Ford, Bethan;Jones, Michael;Nguyen, Linh Lan;Naylor, Matthew C.;Xu, Xinya;Maiello, Pietro;Zoppi, Guillaume;Barrioz, Vincent;Beattie, Neil S.;Qu, Yongtao
关键词：
为了成功地长期部署和操作的锌黄锡矿Cu 2 ZnSn（SxSe 1-x）4（CZTSSe）作为光吸收材料的光致发光，设备的稳定性和恢复在锌黄锡矿太阳能电池进行了研究。采用低温热处理工艺克服了自然老化过程中产生的电荷引出不良现象。结果表明，在老化CZTSSe/CdS异质结的缺陷态减少，而在CZTSSe吸收的表观掺杂密度增加，由于在退火过程中的异质结的Cd/Zn互扩散。原位退火实验中的透射电子显微镜被用来研究元素在CZTSSe/CdS异质结的扩散。这项研究揭示了热处理的关键作用，以提高吸收剂/钼背接触，提高吸收剂/缓冲异质结的质量，并恢复老化的锌黄锡矿薄膜太阳能电池的器件性能。
For successful long-term deployment and operation of kesterites Cu2ZnSn(SxSe1–x)4 (CZTSSe) as light-absorber materials for photovoltaics, device stability and recovery in kesterite solar cells are investigated. A low-temperature heat treatment is applied to overcome the poor charge extraction that developed in the natural aging process. It is suggested that defect states at aged CZTSSe/CdS heterojunctions were reduced, while apparent doping density in the CZTSSe absorber increased due to Cd/Zn interdiffusion at the heterojunction during the annealing process. In situ annealing experiments in a transmission electron microscope were used to investigate the elemental diffusion at the CZTSSe/CdS heterojunction. This study reveals the critical role of heat treatment to enhance the absorber/Mo back contact, improve the quality of the absorber/buffer heterojunction, and recover the device performance in aged kesterite thin-film solar cells.
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