材料科学
X射线光电子能谱
钙钛矿(结构)
钝化
傅里叶变换红外光谱
能量转换效率
紫外光电子能谱
介电谱
扫描电子显微镜
开尔文探针力显微镜
化学工程
光致发光
碘化物
光电子学
分析化学(期刊)
纳米技术
无机化学
复合材料
图层(电子)
化学
物理化学
电化学
有机化学
电极
工程类
原子力显微镜
作者
Yukta Yukta,Rohit D. Chavan,Apurba Mahapatra,Daniel Prochowicz,Pankaj Yadav,Parameswar Krishnan Iyer,Soumitra Satapathi
标识
DOI:10.1021/acsami.3c09887
摘要
Engineering multidimensional two-dimensional/three-dimensional (2D/3D) perovskite interfaces as light harvesters has recently emerged as a potential strategy to obtain a higher photovoltaic performance in perovskite solar cells (PSCs) with enhanced environmental stability. In this study, we utilized the 1,5-diammonium naphthalene iodide (NDAI) bulky organic spacer for interface modification in 3D perovskites for passivating the anionic iodide/uncoordinated Pb2+ vacancies as well as facilitating charge carrier transfer by improving the energy band alignment at the perovskite/HTL interface. Consequently, the NDAI-treated 2D/3D PSCs showed an enhanced open-circuit voltage and fill factor with a remarkable power conversion efficiency (PCE) of 21.48%. In addition, 2D/3D perovskite devices without encapsulation exhibit a 77% retention of their initial output after 1000 h of aging under 50 ± 5% relative humidity. Furthermore, even after 200 h of storage in 85 °C thermal stress, the devices maintain 60% of their initial PCE. The defect passivation and interface modification mechanism were studied in detail by UV vis absorption, photoluminescence spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), solid-state NMR, space-charge-limited current (SCLC) mobility measurement, and impedance spectroscopy. This study provides a promising path for perovskite surface modification in slowing their degradation against external stimuli, providing a future direction for increasing the perovskite device efficiency and durability.
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