Organic–inorganic halide perovskites are efficient absorbers for solar cells. Nevertheless, the trap states at the surfaces and grain boundaries are a detrimental factor compromising the device performance. Here, an organic dye (AQ310) is employed as passivator to reduce the trap states of the perovskites and promote better stability. The results demonstrate that the trap states of perovskite are minimized by the presence of AQ310's COOH group and the formation of coordination with under‐coordinated Pb²⁺ ions. The resulting carrier recombination time is prolonged and verified by the photoluminescence and open‐circuit voltage decay measurements. Consequently, the best average power conversion efficiency (PCE) of 19.43% is achieved for the perovskite solar cell (PSC) with AQ310 passivation, as compared with a low average PCE of 17.98% for the PSC without AQ310 passivation.

中文翻译：

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利用γ射线有机染料对钙钛矿杂化太阳能电池的有效钝化。COOH官能团

有机-无机卤化物钙钛矿是太阳能电池的有效吸收剂。然而，表面和晶界处的陷阱状态是损害器件性能的有害因素。此处，有机染料（AQ310）被用作钝化剂，以降低钙钛矿的陷阱态并提高稳定性。结果表明，钙钛矿的陷阱状态由AQ310的存在最小化 COOH基团和协调与下配位铅形成²⁺离子。通过光致发光和开路电压衰减测量，可以延长并延长由此产生的载流子复合时间。因此，具有AQ310钝化的钙钛矿太阳能电池（PSC）达到了19.43％的最佳平均功率转换效率（PCE），而没有经过AQ310钝化的PSC的平均PCE则低至17.98％。