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Improving CdTe‐Based Thin‐Film Solar Cell Efficiency with the Oxygenated CdSe Layer Prepared by Sputtering Process
Author(s) -
Hu Anhong,
Zhou Jie,
Qin Xinyuan,
Jiang Yuxia,
Zhou Peng,
Zhong Penggeng,
Tang Shunwei,
Wu Xuanzhi,
Yang Deren
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000560
Subject(s) - cadmium telluride photovoltaics , materials science , sputtering , layer (electronics) , optoelectronics , solar cell , thin film , open circuit voltage , oxygen , energy conversion efficiency , sputter deposition , short circuit , nanotechnology , voltage , chemistry , electrical engineering , engineering , organic chemistry
Sputtered CdSe window layer can improve the short‐circuit current density ( J sc ) of CdTe‐based thin‐film solar cell, however, meanwhile degrade the open‐circuit voltage ( V oc ) 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 CdSeO 3 phase. Both V oc and FF of the CdTe solar cells are improved due to the formation of CdSeO 3 , 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.