材料科学
异质结
钙钛矿(结构)
三碘化物
碘化物
热稳定性
图层(电子)
钙钛矿太阳能电池
光电子学
化学工程
能量转换效率
纳米技术
无机化学
化学
物理化学
色素敏化染料
电极
工程类
电解质
作者
. Yukta,Nishi Parikh,Rohit D. Chavan,Pankaj Yadav,Mohammad Khaja Nazeeruddin,Soumitra Satapathi
标识
DOI:10.1021/acsami.2c04455
摘要
Heterostructures involving two-dimensional/three-dimensional (2D/3D) perovskites have recently attracted increased attention due to their ability to combine the high photovoltaic performance of 3D perovskites with the increased stability of 2D perovskites. Here we report ammonium thiocyanate (NH4SCN) passivated 3D methylammonium lead triiodide (MAPbI3) perovskite active layer and deposition of 2D perovskite capping layer using xylylene diammonium iodide (XDAI) organic cation. The 2D/3D perovskite heterojunction formation is probed by using FESEM and UPS spectroscopy. The NH4SCN passivated MAPbI3 perovskite has shown 19.6% PCE compared to the 17.18% PCE of pristine MAPbI3 perovskite solar cells (PSCs). Finally, the champion 2D/3D perovskite heterojunction based solar cells have achieved the remarkable PCE of 20.74%. The increased PCE in 2D/3D PSCs is mainly attributed to the reduced defect density and suppressed nonradiative recombination losses. Moreover, the hydrophobic 2D capping layer endows the 2D/3D heterojunction perovskites with exceptional moisture, thermal and UV stability, highlighting the promise of highly stable and efficient 2D/3D PSCs.
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