期刊
JOULE
卷 4, 期 4, 页码 902-912出版社
CELL PRESS
DOI: 10.1016/j.joule.2020.03.007
关键词
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资金
- New Energy and Industrial Technology Development Organization (NEDO, Japan)
- KAKEHI grant of Japan [18H02078]
- National Natural Science Foundation of China [11574199, 11674219, 11834011, 11911530142]
Tin-based perovskites with narrow band gap and high carrier mobility are promising candidates for the preparation of efficient lead-free perovskite solar cells (PSCs). However, the poor crystallization of tin-based perovskite films with unfavorable defects and rough morphology is still the biggest challenge to achieve high power conversion efficiency. In this work, we reveal the surface-controlled growth of FASnI(3) perovskite films, and then precisely control the crystallization process by reducing the surface energy of the solution-air surface with a tailormade pentafluorophen-oxyethylammonium iodide (FOEI). The demonstrated strategy enabled us to achieve highly oriented and smooth FASnI(3)-FOEI films with lower defect density and longer lifetime of charge carriers. A certificated efficiency of 10.16% for tin-based PSCs was obtained from an accredited institute.
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