Improving CdTe‐Based Thin‐Film Solar Cell Efficiency with the Oxygenated CdSe Layer Prepared by Sputtering Process

Sputtered CdSe window layer can improve the short‐circuit current density (Jsc) of CdTe‐based thin‐film solar cell, however, meanwhile degrade the open‐circuit voltage (Voc) and fill factor (FF). Herein, an oxygenation process is introduced during CdSe sputtering to improve this window layer's...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2020-12, Vol.217 (24), p.n/a
Main Authors: Hu, Anhong, Zhou, Jie, Qin, Xinyuan, Jiang, Yuxia, Zhou, Peng, Zhong, Penggeng, Tang, Shunwei, Wu, Xuanzhi, Yang, Deren
Format: Article
Language:English
Subjects:
Cadmium selenides
Cadmium tellurides
CdSe:O window layers
CdSeO3
CdTe solar cells
Circuits
Efficiency
Intermetallic compounds
Modules
Oxygen
Oxygenation
Photovoltaic cells
Solar cells
Sputtering
sputtering processes
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Summary:Sputtered CdSe window layer can improve the short‐circuit current density (Jsc) of CdTe‐based thin‐film solar cell, however, meanwhile degrade the open‐circuit voltage (Voc) and fill factor (FF). Herein, an oxygenation process is introduced during CdSe sputtering to improve this window layer's property for better device performance. The influence of oxygen on the CdSe is similar as the effect of oxygen on CdS. Incorporation of oxygen into the CdSe film promotes the formation of CdSeO3 phase. Both Voc and FF of the CdTe solar cells are improved due to the formation of CdSeO3, and high efficiency (Eff.) of 18.6% is achieved. Efficiency improvement at module level is also demonstrated after applying the CdSe:O process in production line. This progress contributes to the CdTe‐based thin‐film module production for further efficiency improvement and cost reduction. Oxygenated cadmium selenide (CdSe:O) is prepared by the sputtering process. The incorporation of oxygen into the sputtering atmosphere promotes the formation of CdSeO3 phase. When applied as the window layer, the CdSe:O can improve the performance of CdTe‐based thin‐film solar cell. Both open‐circuit voltage (Voc) and fill factor (FF) are improved due to the formation of CdSeO3.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.202000560