【摘 要】
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Cs-based all-inorganic perovskites have been receiving unprecedented attentions in photovoltaic applications due to their high thermodynamic stability[1-2].However,unfavorable bandgap and phase instab
【机 构】
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Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, PR China
【出 处】
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第八届新型太阳能材料科学与技术学术研讨会
论文部分内容阅读
Cs-based all-inorganic perovskites have been receiving unprecedented attentions in photovoltaic applications due to their high thermodynamic stability[1-2].However,unfavorable bandgap and phase instability of Cs-based inorganic perovskites still hinder their further developments[3].In this work,mixed Pb-Sn inorganic perovskites were prepared by a facile solution process.It was found that the incorporation of Sn in Cs-based inorganic perovskites could not only narrow the bandgap from 2.06 eV to 1.63 eV,but also stabilize the perovskite phase structure by increasing their tolerance factor.By further introducing the antioxidant SnF2 to slow down the oxidation of Sn2+,and replacing labile organic hole-transporting-layer and noble metal-electrode with a carbon-electrode,the resultant carbon-based Pb-Sn mixed all-inorganic perovskite solar cells (C-IPSCs) achieved a champion efficiency up to 12.69 % and a high open-circuit voltage of 1.23 V.
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