期刊
NANO RESEARCH
卷 11, 期 11, 页码 5913-5923出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-018-2103-z
关键词
perovskite solar cell; SnS2 nanosheets; electron transport layer; higher carrier mobility; hydrothermal synthesis
类别
资金
- National Natural Science Foundation of China [51772039, 21703027, 51273032, 91333104]
- Fundamental Research Funds for the Central Universities [DUT17ZD206, DUT16QY04]
To promote commercialization of perovskite solar cells (PSCs), low-temperature processed electron transport layer (ETL) with high carrier mobility still needs to be further developed. Here, we reported two-dimensional (2D) tin disulfide (SnS2) nanosheets as ETL in PSCs for the first time. The morphologies of the 2D SnS2 material can be easy controlled by the in situ synthesized method on the conductive fluorine-doped tin oxide (FTO) substrate. We achieved a champion power conversion efficiency (PCE) of 13.63%, with the short-circuit current density (J(SC)) of 23.70 mA/cm(2), open-circuit voltage (V-OC) of 0.95 V, and fill factor (FF) of 0.61. The high J(SC) of PSCs results from effective electron collection of the 2D SnS2 nanosheets from perovskite layer and fast electron transport to the FTO. The low V-OC and FF are the results of the lower conduction band of 2D SnS2 (4.23 eV) than that of TiO2 (4.0 eV). These results demonstrate that 2D material is a promising candidate for ETL in PSCs.
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