The stability issue of organic-inorganic halide perovskite solar cells (PSCs) has become obstruction for their practical applications, although they have attained rapid growth in power conversion efficiency (PCE). Here, we demonstrate a two-in-one additive-engineering strategy by doping organic additives benzoquinone (BQ) into MAPbI₃ film and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) into hole transport layer (HTL) in a single device, resulting in efficient PSCs with enhanced air stability. The BQ and the F4TCNQ can respectively improve the crystal quality of the MAPbI₃ film and increase the moisture tolerance of HTL. The two additives suppress the charge recombination and take a synergistic effect on reduction of traps, contributing to the long-term air stability of unencapsulated planar PSCs. The resulting PSCs with a PCE over 16% can maintain 95% of their initial efficiency after 1400 h in ambient air environment. This strategy provides a new way for the air stability enhancement of PSCs by engineering the perovskite layer and HTL with organic additives in a meanwhile.

尽管有机-无机卤化物钙钛矿太阳能电池（PSC）的功率转换效率（PCE）迅速增长，但它们的实际应用已成为阻碍其实用性的问题。在这里，我们通过将有机添加剂苯醌（BQ）掺入MAPbI ₃膜中以及将2,3,5,6-四氟-7,7,8,8-四氰基喹二甲烷（F4TCNQ）掺入掺杂剂中，展示了一种二合一的添加剂工程策略。单个设备中的空穴传输层（HTL），从而产生具有增强的空气稳定性的高效PSC。BQ和F4TCNQ可以分别提高MAPbI ₃的晶体质量膜并增加HTL的耐湿性。两种添加剂可抑制电荷复合，并对减少陷阱产生协同作用，从而有助于未封装的平面PSC的长期空气稳定性。所得的PCE超过16％的PSC在周围空气环境中1400 h后可以保持其初始效率的95％。通过同时用有机添加剂对钙钛矿层和HTL进行工程设计，该策略为增强PSC的空气稳定性提供了一条新途径。