Passivation of polycrystalline perovskite defects related to its surface, grain boundaries and buried interface is important to enhance the performance of perovskite photovoltaics. Here, a green and simple antisolvent-mediator contained ethylacetate and polymer polymethyl methacrylate, for the first time, is developed to stabilize the perovskite active layer. Such polymer-assisted mediators not only can facilitate perovskite crystal growth, but also passivate its interface and bulk defects. Under AM 1.5G illumination, the antisolvent-mediator processed NiO_x-based inverted perovskite solar cells (PSCs) show a power conversion efficiency (PCE) of 22.21 % and a high open-circuit voltage (V_oc) of 1.161 V. Besides, the devices further present a high PCE over 24 % under 0.6 suns, indicating efficient passivation of defects-induced non-radiative recombination. Importantly, a V_oc approaching 1.20 V is obtained from 1-square-centimeter cells, which is the highest V_oc in NiO_x based inverted PSCs to the best of our knowledge. Compared to pristine cells, the antisolvent-mediators passivated cells without encapsulation retain 95 % of their initial values after 200 days. Furthermore, we can obtain a high V_oc of 7.044 V for modules with 6 subcells connected in series.

与其表面、晶界和掩埋界面相关的多晶钙钛矿缺陷的钝化对于提高钙钛矿光伏电池的性能非常重要。在这里，首次开发了一种含有乙酸乙酯和聚合物聚甲基丙烯酸甲酯的绿色简单反溶剂介体来稳定钙钛矿活性层。这种聚合物辅助介体不仅可以促进钙钛矿晶体的生长，还可以钝化其界面和本体缺陷。在 AM 1.5G 照明下，反溶剂-介质处理的基于 NiO _x的倒置钙钛矿太阳能电池 (PSC) 显示出 22.21 % 的功率转换效率 (PCE) 和高开路电压 (V _oc) 为 1.161 V。此外，该器件在 0.6 个太阳下进一步表现出超过 24% 的高 PCE，表明缺陷诱导的非辐射复合的有效钝化。重要的是，从 1 平方厘米的电池中获得了接近 1.20 V 的 V oc，据我们所知，这是_基于NiO x 的倒置 PSC 中最高_{的V oc 。}与原始细胞相比，未经封装的抗溶剂介质钝化细胞在 200 天后保留了其初始值的 95%。此外，对于具有 6 个串联子电池的模块，我们可以获得 7.044 V 的高 V _{oc 。}