Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 13, Issue 9, Pages 2896-2902Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ee01845g
Keywords
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Funding
- National Natural Science Foundation of China [11574199, 11674219, 11834011]
- New Energy and Industrial Technology Development Organization (NEDO, Japan)
- KAKEHI Grant of Japan [18H02078]
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Tin perovskite solar cells (TPSCs) are rising as the most promising candidates for lead-free PSCs. However, the randomly crystallized tin halide perovskite with a high concentration of defects is still the bottleneck for obtaining high efficiency. Here, we report the pretreatment of FASnI(3)(formamidinium, FA) perovskite film by spin-coating a solution of organic halide saltn-propylammonium iodide (PAI) before annealing. It is found that PAI can induce the templated growth of FASnI(3)crystals by reconstruction of the intermediate phase, resulting in a highly crystallized FASnI(3)film with preferential orientation along the (100) plane and suppressed trap density. Finally, a stabilized efficiency of 11.22% was certified at an accredited test center and the cell is stable, maintaining over 95% of its initial efficiency after 1000 hours of operation at the maximum power point.
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