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Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-07-24 , DOI: 10.1039/d0ee01833c Yi Yang 1, 2, 3, 4, 5 , Cheng Liu 1, 2, 3, 4, 5 , Arup Mahata 6, 7, 8, 9, 10 , Mo Li 11, 12, 13, 14, 15 , Cristina Roldán-Carmona 11, 12, 13, 14 , Yong Ding 1, 2, 3, 4, 5 , Zulqarnain Arain 1, 2, 3, 4, 5 , Weidong Xu 1, 2, 3, 4, 5 , Yunhao Yang 1, 2, 3, 4, 5 , Pascal Alexander Schouwink 11, 12, 13, 14 , Andreas Züttel 11, 12, 13, 14, 15 , Filippo De Angelis 6, 7, 8, 9, 10 , Songyuan Dai 1, 2, 3, 4, 5 , Mohammad Khaja Nazeeruddin 11, 12, 13, 14
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-07-24 , DOI: 10.1039/d0ee01833c Yi Yang 1, 2, 3, 4, 5 , Cheng Liu 1, 2, 3, 4, 5 , Arup Mahata 6, 7, 8, 9, 10 , Mo Li 11, 12, 13, 14, 15 , Cristina Roldán-Carmona 11, 12, 13, 14 , Yong Ding 1, 2, 3, 4, 5 , Zulqarnain Arain 1, 2, 3, 4, 5 , Weidong Xu 1, 2, 3, 4, 5 , Yunhao Yang 1, 2, 3, 4, 5 , Pascal Alexander Schouwink 11, 12, 13, 14 , Andreas Züttel 11, 12, 13, 14, 15 , Filippo De Angelis 6, 7, 8, 9, 10 , Songyuan Dai 1, 2, 3, 4, 5 , Mohammad Khaja Nazeeruddin 11, 12, 13, 14
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The emerging 2D perovskites exhibit superior stability and similar optoelectronic attributes compared to the 3D analogues, but their strong exciton-binding energy and inferior interlayer charge-transport reduce dramatically the device performance. Herein, we report a universal approach towards high-efficiency 2D perovskite solar cells (PSCs) by using the synergistic effect of NH4Cl and H2O to rotate the crystallographic orientation of 2D systems. The preferential adsorption of NH4Cl to the (202) crystal plane and the accelerated deprotonation of NH4+ by H2O guide the crystal growth of the 2D framework towards vertical out-of-plane orientation, which strongly improves the 2D crystallinity, charge mobility, and carrier lifetime. As a representative, (PEA)2(MA)3Pb4I13-based PSCs (n ≤ 4) prepared via the vertical-rotation process achieve a champion power conversion efficiency (PCE) of 17.03%, among the best PCEs reported for 2D PSCs. These findings offer a universal approach to rotate the orientation of 2D perovskites for efficient photovoltaics regardless of the perovskite composition.
中文翻译：
通过垂直旋转工艺实现高效二维钙钛矿太阳能电池的通用方法
与3D类似物相比，新兴的2D钙钛矿展现出卓越的稳定性和类似的光电属性，但是它们强大的激子结合能和劣质的层间电荷传输显着降低了器件性能。在本文中，我们报告了通过利用NH 4 Cl和H 2 O的协同效应旋转2D系统的晶体取向的高效2D钙钛矿太阳能电池（PSC）的通用方法。NH 4 Cl在（202）晶面上的优先吸附和NH 4 +被H 2加速去质子O引导2D框架的晶体朝向垂直平面外取向生长，从而极大地改善2D结晶度，电荷迁移率和载流子寿命。作为代表性的，（PEA）2（MA）3的Pb 4余点13基的PSC（Ñ制备≤4）经由垂直旋转处理实现的17.03％冠军功率转换效率（PCE），最好的PCE中报道了2D PSC。这些发现提供了一种通用的方法来旋转2D钙钛矿的方向，以实现高效光伏，而无需考虑钙钛矿的成分。
更新日期：2020-09-16
中文翻译：
通过垂直旋转工艺实现高效二维钙钛矿太阳能电池的通用方法
与3D类似物相比，新兴的2D钙钛矿展现出卓越的稳定性和类似的光电属性，但是它们强大的激子结合能和劣质的层间电荷传输显着降低了器件性能。在本文中，我们报告了通过利用NH 4 Cl和H 2 O的协同效应旋转2D系统的晶体取向的高效2D钙钛矿太阳能电池（PSC）的通用方法。NH 4 Cl在（202）晶面上的优先吸附和NH 4 +被H 2加速去质子O引导2D框架的晶体朝向垂直平面外取向生长，从而极大地改善2D结晶度，电荷迁移率和载流子寿命。作为代表性的，（PEA）2（MA）3的Pb 4余点13基的PSC（Ñ制备≤4）经由垂直旋转处理实现的17.03％冠军功率转换效率（PCE），最好的PCE中报道了2D PSC。这些发现提供了一种通用的方法来旋转2D钙钛矿的方向，以实现高效光伏，而无需考虑钙钛矿的成分。
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