Low-Cost and Highly Efficient Carbon-Based Perovskite Solar Cells Exhibiting Excellent Long-Term Operational and UV Stability

被引:92
作者
Arora, Neha [1 ]
Dar, M. Ibrahim [1 ]
Akin, Seckin [1 ,2 ]
Uchida, Ryusuke [1 ,3 ]
Baumeler, Thomas [1 ]
Liu, Yuhang [1 ]
Zakeeruddin, Shaik Mohammed [1 ]
Graetzel, Michael [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
[2] Karamanoglu Mehmetbey Univ, Dept Met & Mat Engn, TR-70100 Karaman, Turkey
[3] Panasonic Corp, Inst Energy & Mat Food Resources, Technol Innovat Div, 3-1-1 Yagumo Naka Machi, Moriguchi, Osaka 5708501, Japan
基金
瑞士国家科学基金会;
关键词
carbon; efficiency; inorganic hole conductor; perovskite solar cells; stability; HALIDE PEROVSKITES; LENGTHS; CUSCN; TIO2; EXTRACTION; GRAPHENE; LAYERS;
D O I
10.1002/smll.201904746
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Today's perovskite solar cells (PSCs) mostly use components, such as organic hole conductors or noble metal back contacts, that are very expensive or cause degradation of their photovoltaic performance. For future large-scale deployment of PSCs, these components need to be replaced with cost-effective and robust ones that maintain high efficiency while ascertaining long-term operational stability. Here, a simple and low-cost PSC architecture employing dopant-free TiO2 and CuSCN as the electron and hole conductor, respectively, is introduced while a graphitic carbon layer deposited at room temperature serves as the back electrical contact. The resulting PSCs show efficiencies exceeding 18% under standard AM 1.5 solar illumination and retain approximate to 95% of their initial efficiencies for >2000 h at the maximum power point under full-sun illumination at 60 degrees C. In addition, the CuSCN/carbon-based PSCs exhibit remarkable stability under ultraviolet irradiance for >1000 h while under similar conditions, the standard spiro-MeOTAD/Au based devices degrade severely.
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页数:6
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