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Hexylammonium Iodide Derived Two-Dimensional Perovskite as Interfacial Passivation Layer in Efficient Two-Dimensional/Three-Dimensional Perovskite Solar Cells.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-12-20 , DOI: 10.1021/acsami.9b17930 Yanping Lv 1 , Xuedan Song 1 , Yanfeng Yin 2 , Yulin Feng 1 , Hongru Ma 1 , Ce Hao 1 , Shengye Jin 2 , Yantao Shi 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-12-20 , DOI: 10.1021/acsami.9b17930 Yanping Lv 1 , Xuedan Song 1 , Yanfeng Yin 2 , Yulin Feng 1 , Hongru Ma 1 , Ce Hao 1 , Shengye Jin 2 , Yantao Shi 1
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Defects locating within grain boundaries or on the film surface, especially organic cation vacancies and iodine vacancies, make the fabrication of perovskite solar cells (PSCs) with superior performance a challenge. Organic ammonium iodide is a promising candidate and has been frequently used to passivate these defects by forming two-dimensional (2D) perovskite. In this work, it is found that the chain length of organic ammonium iodide is a crucial factor on the defect passivation effect. Compared to butylammonium iodide, the hexylammonium iodide (HAI)-derived 2D perovskite is more efficient in decreasing interfacial defects, resulting in a notably enhanced photoluminescence lifetime and a more suppressed interfacial charge recombination process. As a consequence, the ultimate power conversion efficiency (PCE) has reached 20.62% (3D + HAI) as compared to 18.83% (3D). Moreover, the long-term durability of the corresponding PSCs against humidity and heat is simultaneously improved. This work once again demonstrates that the 2D/3D structure is promising for further improving the PCE and stability of PSCs.
中文翻译：
碘化己基铵铵在高效二维/三维钙钛矿太阳能电池中作为界面钝化层的二维钙钛矿。
位于晶粒边界内或膜表面上的缺陷，特别是有机阳离子空位和碘空位，使得具有优异性能的钙钛矿太阳能电池（PSC）的制造成为挑战。有机碘化铵是有前途的候选物，并已通过形成二维（2D）钙钛矿而经常用于钝化这些缺陷。在这项工作中，发现有机碘化铵的链长是缺陷钝化效果的关键因素。与碘化丁基铵相比，碘化六铵（HAI）衍生的2D钙钛矿在减少界面缺陷方面更有效，从而显着提高了光致发光寿命，并进一步抑制了界面电荷重组过程。结果，最终功率转换效率（PCE）已达到20。62％（3D + HAI），而18.83％（3D）。此外，同时提高了相应PSC抵抗潮湿和热的长期耐久性。这项工作再次证明2D / 3D结构有望进一步改善PCE和PSC的稳定性。
更新日期：2019-12-20
中文翻译：
碘化己基铵铵在高效二维/三维钙钛矿太阳能电池中作为界面钝化层的二维钙钛矿。
位于晶粒边界内或膜表面上的缺陷，特别是有机阳离子空位和碘空位，使得具有优异性能的钙钛矿太阳能电池（PSC）的制造成为挑战。有机碘化铵是有前途的候选物，并已通过形成二维（2D）钙钛矿而经常用于钝化这些缺陷。在这项工作中，发现有机碘化铵的链长是缺陷钝化效果的关键因素。与碘化丁基铵相比，碘化六铵（HAI）衍生的2D钙钛矿在减少界面缺陷方面更有效，从而显着提高了光致发光寿命，并进一步抑制了界面电荷重组过程。结果，最终功率转换效率（PCE）已达到20。62％（3D + HAI），而18.83％（3D）。此外，同时提高了相应PSC抵抗潮湿和热的长期耐久性。这项工作再次证明2D / 3D结构有望进一步改善PCE和PSC的稳定性。
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