The ubiquitous hysteresis in the current-voltage characteristic of perovskite solar cells (PSCs) interferes in a proper determination of the diode ideality factor ($n$), a key parameter commonly adopted to analyze recombination mechanisms. An alternative way of determining $n$ is by measuring the voltage variation of the ac resistances in conditions of negligible steady-state dc currents. A reliable analysis of $n$ based on the determination of the resistive response, free of hysteretic influences, reveals two separated voltage exponential dependences using different perovskite absorbers (3D perovskites layer based on CH₃NH₃PbI₃ or mixed Cs_0.1FA_0.74MA_0.13PbI_2.48Br_0.39) and a variety of interlayers (2D perovskite thin capping). The dominant resistive element always exhibits an exponential dependence with factor $n\approx 2$, irrespective of the type of perovskite and capping layers. In addition, a non-negligible resistive mechanism occurs at low-frequencies (with voltage-independent time constant ~ 1 s) which is related to the kinetic properties of the outer interfaces, with varying ideality factor ($n=2$ for CH₃NH₃PbI₃, and $n=1.5$ for Cs_0.1FA_0.74MA_0.13PbI_2.48Br_0.39). Our work identifies common features in the carrier recombination mechanisms among different types of high-efficiency PSCs, and simultaneously signals particularities on specific architectures, mostly in the carrier dynamics at outer interfaces.

钙钛矿太阳能电池（PSC）的电流-电压特性中普遍存在的迟滞会干扰对二极管理想因子（$ñ$），这是通常用于分析重组机制的关键参数。确定的另一种方法$ñ$通过在可忽略的稳态直流电流条件下测量交流电阻的电压变化来实现。可靠的分析$ñ$基于电阻响应的确定，不受滞后影响，揭示了使用不同的钙钛矿吸收剂（基于CH ₃ NH ₃ PbI ₃或混合Cs _0.1 FA _0.74 MA _0.13 PbI _2.48 Br _0.39的3D钙钛矿层）的两个分离的电压指数依赖性，以及各种中间层（2D钙钛矿薄盖）。主导电阻元件始终表现出与因子的指数相关性$ñ\approx \mathrm{2个}$，而不考虑钙钛矿和封盖层的类型。此外，不可忽略的电阻机制发生在低频下（与电压无关的时间常数约为1 s），这与外部界面的动力学特性有关，且理想因子不同（$ñ=\mathrm{2个}$对于CH ₃ NH ₃ PbI ₃，和$ñ=1.5$对于Cs _0.1 FA _0.74 MA _0.13 PbI _2.48 Br _0.39）。我们的工作确定了不同类型的高效PSC之间的载波重组机制中的共同特征，并同时发信号通知了特定体系结构上的特殊性，主要是外部接口处的载波动态。