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Regulated Crystallization of FASnI3 Films through Seeded Growth Process for Efficient Tin Perovskite Solar Cells.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-08-24 , DOI: 10.1021/acsami.0c11253
Kun Cao 1 , Yangfeng Cheng 1 , Junwen Chen 1 , Yue Huang 1 , Mengru Ge 1 , Jie Qian 1 , Lihui Liu 1 , Jing Feng 2 , Shufen Chen 1, 3 , Wei Huang 1, 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-08-24 , DOI: 10.1021/acsami.0c11253
Kun Cao 1 , Yangfeng Cheng 1 , Junwen Chen 1 , Yue Huang 1 , Mengru Ge 1 , Jie Qian 1 , Lihui Liu 1 , Jing Feng 2 , Shufen Chen 1, 3 , Wei Huang 1, 3
Affiliation
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Although rapid progress has been made in tin-based perovskite solar cells (PSCs), the inferior film qualities of the solution-processed perovskites always lead to poor reproducibility and instability. Herein, we present a simple seeded growth (SG) approach to obtain high-quality tin-based perovskite films with preferred crystal orientation, large grain sizes, and fewer apparent grain boundaries. High-quality tin-based perovskite films fabricated through this SG process could greatly reduce the nonradiative recombination centers and inhibit the oxidation of Sn2+. Using formamidinium tin tri-iodide (FASnI3) perovskites, the SG-PSCs exhibit a much improved efficiency from 5.37% (control) to 7.32% with all improved photovoltaic parameters. Moreover, this SG strategy is easily applicable to other tin-based perovskite compositions. The PSC based on methylammonium (MA) doped mixed-cation perovskite (FA0.75MA0.25SnI3) exhibited a power conversion efficiency (PCE) of 8.54% with an improvement of 19.3% in the photovoltaic performance, making it a general approach for achieving efficient tin-based PSCs.
中文翻译：
通过有效的钙钛矿锡太阳能电池的晶种生长过程调节FASnI3薄膜的晶化。
尽管在锡基钙钛矿太阳能电池（PSC）方面取得了迅速的进步，但是固溶处理的钙钛矿的劣质薄膜总是导致重现性和不稳定性差。本文中，我们提出一种简单的籽晶生长（SG）方法，以获得具有优选晶体取向，大晶粒尺寸和较少表观晶界的高质量锡基钙钛矿薄膜。通过这种SG工艺制备的高质量锡基钙钛矿薄膜可以大大减少非辐射复合中心并抑制Sn 2+的氧化。使用三碘甲form锡（FASnI 3钙钛矿，SG-PSC在所有改善的光电参数下，效率从5.37％（对照）提高到7.32％。而且，该SG策略可容易地应用于其他锡基钙钛矿组合物。基于甲基铵（MA）掺杂的混合阳离子钙钛矿（FA 0.75 MA 0.25 SnI 3）的PSC表现出8.54％的功率转换效率（PCE），光伏性能提高了19.3％，这使其成为实现该目标的通用方法高效的锡基PSC。
更新日期：2020-09-16
中文翻译：
通过有效的钙钛矿锡太阳能电池的晶种生长过程调节FASnI3薄膜的晶化。
尽管在锡基钙钛矿太阳能电池（PSC）方面取得了迅速的进步，但是固溶处理的钙钛矿的劣质薄膜总是导致重现性和不稳定性差。本文中，我们提出一种简单的籽晶生长（SG）方法，以获得具有优选晶体取向，大晶粒尺寸和较少表观晶界的高质量锡基钙钛矿薄膜。通过这种SG工艺制备的高质量锡基钙钛矿薄膜可以大大减少非辐射复合中心并抑制Sn 2+的氧化。使用三碘甲form锡（FASnI 3钙钛矿，SG-PSC在所有改善的光电参数下，效率从5.37％（对照）提高到7.32％。而且，该SG策略可容易地应用于其他锡基钙钛矿组合物。基于甲基铵（MA）掺杂的混合阳离子钙钛矿（FA 0.75 MA 0.25 SnI 3）的PSC表现出8.54％的功率转换效率（PCE），光伏性能提高了19.3％，这使其成为实现该目标的通用方法高效的锡基PSC。
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