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High-Performance Lead-Free Solar Cells Based on Tin-Halide Perovskite Thin Films Functionalized by a Divalent Organic Cation
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-06-03 , DOI: 10.1021/acsenergylett.0c00888 Min Chen 1 , Qingshun Dong 1, 2 , Felix T. Eickemeyer 3 , Yuhang Liu 3 , Zhenghong Dai 1 , Alexander D. Carl 4 , Behzad Bahrami 5 , Ashraful H. Chowdhury 5 , Ronald L. Grimm 4 , Yantao Shi 2 , Qiquan Qiao 5 , Shaik Mohammed Zakeeruddin 3 , Michael Grätzel 3 , Nitin P. Padture 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-06-03 , DOI: 10.1021/acsenergylett.0c00888 Min Chen 1 , Qingshun Dong 1, 2 , Felix T. Eickemeyer 3 , Yuhang Liu 3 , Zhenghong Dai 1 , Alexander D. Carl 4 , Behzad Bahrami 5 , Ashraful H. Chowdhury 5 , Ronald L. Grimm 4 , Yantao Shi 2 , Qiquan Qiao 5 , Shaik Mohammed Zakeeruddin 3 , Michael Grätzel 3 , Nitin P. Padture 1
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Tin-based halide perovskite solar cells (PSCs) hold the most promise among lead-free PSCs, but they are plagued with inadequate environmental stability and power-conversion efficiency (PCE). Here we demonstrate that the optimum incorporation of a bulky divalent organic cation, 4-(aminomethyl)piperidinium (4AMP), in FASnI3 thin films improves stability, optoelectronic properties, and PSC performance. The optimized PSC yields a maximum PCE of 10.9% and good 500-h operational stability under continuous illumination. This is attributed to the unique thin-film structure, where the strong ionic bonding afforded by divalent 4AMP may provide near-full-coverage functionalization (encapsulation) of FASnI3 grain surfaces and grain boundaries, retarding O2/H2O ingression and mitigating Sn-defects for reduced photocarrier nonradiative recombination.
中文翻译：
基于二价有机阳离子官能化的卤化钙钛矿薄膜的高性能无铅太阳能电池
锡基卤化钙钛矿太阳能电池（PSC）在无铅PSC中最有前途，但它们受到环境稳定性和功率转换效率（PCE）不足的困扰。在这里，我们证明了在FASnI 3薄膜中最佳结合大体积的二价有机阳离子4-（氨基甲基）哌啶鎓（4AMP）可提高稳定性，光电性能和PSC性能。经过优化的PSC在连续照明下可产生的最大PCE为10.9％，并具有良好的500小时运行稳定性。这归因于独特的薄膜结构，其中二价4AMP提供的强离子键可提供FASnI 3晶粒表面和晶界的几乎完全覆盖的官能化（包封），从而延迟O 2 / H2 O进入并减轻Sn缺陷，以减少光载流子的非辐射重组。
更新日期：2020-07-10
中文翻译：
基于二价有机阳离子官能化的卤化钙钛矿薄膜的高性能无铅太阳能电池
锡基卤化钙钛矿太阳能电池（PSC）在无铅PSC中最有前途，但它们受到环境稳定性和功率转换效率（PCE）不足的困扰。在这里，我们证明了在FASnI 3薄膜中最佳结合大体积的二价有机阳离子4-（氨基甲基）哌啶鎓（4AMP）可提高稳定性，光电性能和PSC性能。经过优化的PSC在连续照明下可产生的最大PCE为10.9％，并具有良好的500小时运行稳定性。这归因于独特的薄膜结构，其中二价4AMP提供的强离子键可提供FASnI 3晶粒表面和晶界的几乎完全覆盖的官能化（包封），从而延迟O 2 / H2 O进入并减轻Sn缺陷，以减少光载流子的非辐射重组。
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