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论文类型：期刊论文
发表时间：2018-11-01
发表刊物：NANO RESEARCH
收录刊物：SCIE
卷号：11
期号：11
页面范围：5913-5923
ISSN号：1998-0124
关键字：perovskite solar cell; SnS2 nanosheets; electron transport layer; higher carrier mobility; hydrothermal synthesis
摘要：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.