Gong Jue, Cui Yupeng, Li Faming, Liu Mingzhen
School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. China.
Small Sci. 2023 Apr 12;3(6):2200108. doi: 10.1002/smsc.202200108. eCollection 2023 Jun.
The photovoltaic (PV) performance of perovskite solar cells (PSCs) has rapidly advanced in the recent years; yet, the stability issue remains one of the last-mile challenges on the road to commercialization. Charge transport layers and their interfaces with perovskites stand for critical tuning knobs that determine the device stability of PSCs. This review focuses on the effects of modification of SnO electron transport layers (ETLs) on the interfacial physicochemical properties and stability of PSC devices. In detail, the intrinsic defects, surface hydroxyls, and nonuniform morphology of SnO will negatively impact its interfacial physicochemical properties, thus degrading the device stability of PSCs. To tackle these existing issues, three modification approaches, such as surface morphology control, surface physicochemical modifications, and surface composite-structure design, are categorized. Lastly, future perspectives in further promoting the stability of PSCs from SnO ETLs are raised based on the currently unresolved issues from both material and device levels.
近年来，钙钛矿太阳能电池（PSCs）的光伏性能迅速提升；然而，稳定性问题仍是其商业化道路上的最后挑战之一。电荷传输层及其与钙钛矿的界面是决定PSCs器件稳定性的关键调节旋钮。本综述聚焦于SnO电子传输层（ETLs）改性对PSCs器件界面物理化学性质和稳定性的影响。具体而言，SnO的固有缺陷、表面羟基和不均匀形态会对其界面物理化学性质产生负面影响，从而降低PSCs的器件稳定性。为解决这些现有问题，将表面形态控制、表面物理化学改性和表面复合结构设计等三种改性方法进行了分类。最后，基于目前材料和器件层面尚未解决的问题，提出了进一步提高基于SnO ETLs的PSCs稳定性的未来展望。
