Efficient Semitransparent Perovskite Solar Cells Using a Transparent Silver Electrode and Four-Terminal Perovskite/Silicon Tandem Device Exploration

被引:17
作者
Chen, Dazheng [1 ]
Pang, Shangzheng [1 ]
Zhu, Weidong [1 ]
Zhang, Hongxiao [1 ]
Zhou, Long [1 ]
He, Fengqin [1 ,2 ]
Chang, Jingjing [1 ]
Lin, Zhenhua [1 ]
Xi, He [1 ]
Zhang, Jincheng [1 ]
Zhang, Chunfu [1 ]
Hao, Yue [1 ]
机构
[1] Xidian Univ, Sch Microelect, Wide Band Gap Semicond Technol State Key Lab, Xian 710071, Shaanxi, Peoples R China
[2] Huanghe Hydropower Solar Ind Technol Co Ltd, 369 South Yanta Rd, Xian 710061, Shaanxi, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
PASSIVATION; DESIGN; ANODES; FILMS;
D O I
10.1155/2018/4012850
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Four-terminal tandem solar cells employing a perovskite top cell and crystalline silicon (Si) bottom cell offer a simpler pathway to surpass the efficiency limit of market-leading single-junction silicon solar cells. To obtain cost-effective top cells, it is crucial to develop transparent conductive electrodes with low parasitic absorption and manufacturing cost. The commonly used indium tin oxide (ITO) shows some drawbacks, like the increasing prices and high-energy magnetron sputtering process. Transparent metal electrodes are promising candidates owing to the simple evaporation process, facile process conditions, and high conductivity, and the cheaper silver (Ag) electrode with lower parasitic absorption than gold may be the better choice. In this work, efficient semitransparent perovskite solar cells (PSCs) were firstly developed by adopting the composite cathode of an ultrathin Ag electrode at its percolation threshold thickness (11 nm), a molybdenum oxide optical coupling layer, and a bathocuproine interfacial layer. The resulting power conversion efficiency (PCE) is 13.38% when the PSC is illuminated from the ITO side and the PCE is 8.34% from the Ag side, and no obvious current hysteresis can be observed. Furthermore, by stacking an industrial Si bottom cell (PCE = 14.2%) to build a four-terminal architecture, the overall PCEs of 17.03% (ITO side) and 11.60% (Ag side) can be obtained, which are 27% and 39% higher, respectively, than those of the perovskite top cell. Also, the PCE of the tandem cell has exceeded that of the reference Si solar cell by about 20%. This work provides an outlook to fabricate high-performance solar cells via the cost-effective pathway.
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页数:8
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