Improvement of kesterite solar cell performance by solution synthesized MoO₃ interfacial layer

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• 作者：Samaneh Ranjbar ; Guy Brammertz ; Bart Vermang ; Afshin Hadipour ; Shuren Cong ; Katsuaki Suganuma ; Thomas Schnabel ; Marc Meuris ; A. F. da Cunha and Jef Poortmans
• 刊名：physica status solidi (a)
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：214
• 期：1
• 全文大小：1611K
• ISSN：1862-6319

文摘

In this study, an ultra-thin MoO₃ layer synthesized by a solution-based technique is introduced as a promising interfacial layer to improve the performance of kesterite Cu₂ZnSnSe₄ (CZTSe) solar cell. Solar cells with 10 nm of MoO₃ between Mo rear contact and CZTSe had larger minority carrier life time and open-circuit voltage compared to the reference solar cells. Temperature dependent current density–voltage measurement indicated that the activation energy (E_A) of the main recombination is higher (∼ 837 meV) in solar cells with MoO₃ layer, as compared to conventional solar cells where E_A ∼ 770 meV, indicating reduced interface recombination. A best efficiency of 7.1% was achieved for a SLG/Mo/MoO₃/CZTSe/CdS/TCO solar cell compared to the reference solar cell SLG/Mo/CZTSe/CdS/TCO for which 5.9% efficiency was achieved.