%0 Journal Article %1 doi:10.1021/jacs.6b08790 %A Ke, Weijun %A Stoumpos, Constantinos C. %A Logsdon, Jenna Leigh %A Wasielewski, Michael R. %A Yan, Yanfa %A Fang, Guojia %A Kanatzidis, Mercouri G. %D 2016 %J Journal of the American Chemical Society %K perovskite solar-cell %N 45 %P 14998-15003 %R 10.1021/jacs.6b08790 %T TiO2–ZnS Cascade Electron Transport Layer for Efficient Formamidinium Tin Iodide Perovskite Solar Cells %U http://dx.doi.org/10.1021/jacs.6b08790 %V 138 %X Achieving high open-circuit voltage (Voc) for tin-based perovskite solar cells is challenging. Here, we demonstrate that a ZnS interfacial layer can improve the Voc and photovoltaic performance of formamidinium tin iodide (FASnI3) perovskite solar cells. The TiO2–ZnS electron transporting layer (ETL) with cascade conduction band structure can effectively reduce the interfacial charge recombination and facilitate electron transfer. Our best-performing FASnI3 perovskite solar cell using the cascaded TiO2–ZnS ETL has achieved a power conversion efficiency of 5.27\%, with a higher Voc of 0.380 V, a short-circuit current density of 23.09 mA cm–2, and a fill factor of 60.01\%. The cascade structure is further validated with a TiO2–CdS ETL. Our results suggest a new approach for further improving the performance of tin-based perovskite solar cells with a higher Voc.

@article{doi:10.1021/jacs.6b08790, abstract = { Achieving high open-circuit voltage (Voc) for tin-based perovskite solar cells is challenging. Here, we demonstrate that a ZnS interfacial layer can improve the Voc and photovoltaic performance of formamidinium tin iodide (FASnI3) perovskite solar cells. The TiO2–ZnS electron transporting layer (ETL) with cascade conduction band structure can effectively reduce the interfacial charge recombination and facilitate electron transfer. Our best-performing FASnI3 perovskite solar cell using the cascaded TiO2–ZnS ETL has achieved a power conversion efficiency of 5.27\%, with a higher Voc of 0.380 V, a short-circuit current density of 23.09 mA cm–2, and a fill factor of 60.01\%. The cascade structure is further validated with a TiO2–CdS ETL. Our results suggest a new approach for further improving the performance of tin-based perovskite solar cells with a higher Voc. }, added-at = {2017-02-23T09:12:09.000+0100}, author = {Ke, Weijun and Stoumpos, Constantinos C. and Logsdon, Jenna Leigh and Wasielewski, Michael R. and Yan, Yanfa and Fang, Guojia and Kanatzidis, Mercouri G.}, biburl = {https://www.bibsonomy.org/bibtex/27491a31e3eaa97ccad8edd865e0f0aef/baumbach}, description = {TiO2–ZnS Cascade Electron Transport Layer for Efficient Formamidinium Tin Iodide Perovskite Solar Cells - Journal of the American Chemical Society (ACS Publications)}, doi = {10.1021/jacs.6b08790}, eprint = {http://dx.doi.org/10.1021/jacs.6b08790}, interhash = {f0d2c04b702db99c34fd6592c9946b85}, intrahash = {7491a31e3eaa97ccad8edd865e0f0aef}, journal = {Journal of the American Chemical Society}, keywords = {perovskite solar-cell}, note = {PMID: 27776416}, number = 45, pages = {14998-15003}, timestamp = {2017-02-23T09:12:09.000+0100}, title = {TiO2–ZnS Cascade Electron Transport Layer for Efficient Formamidinium Tin Iodide Perovskite Solar Cells}, url = {http://dx.doi.org/10.1021/jacs.6b08790}, volume = 138, year = 2016 }