Abstract The rapid development of perovskite solar cells has been based on improvements in materials and device architectures, yet further progress towards their theoretical limit will require a detailed study of the main physical processes determining the photovoltaic performance. Luminescence can be a key parameter for this purpose, as it directly assesses radiative recombination. We present steady-state absolute photoluminescence of an operating device at varying voltages as a tool to study the loss mechanisms in perovskite devices. The calibration to absolute photon numbers gives access to the variation of the relative radiative/non-radiative recombination weighted along the measured potentials, and allows identifying charge extraction deficits not only at short-circuit conditions but at each point of the current-voltage curve, which we show on a vacuum-deposited solar cell. These measurements can be crucial to characterize the nature of the charge losses, a step to develop approaches to improve this photovoltaic technology.

中文翻译：

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钙钛矿太阳能电池电流-电压曲线中电压相关原位光致发光的辐射和非辐射损失

摘要 钙钛矿太阳能电池的快速发展基于材料和器件结构的改进，但进一步向理论极限迈进需要对决定光伏性能的主要物理过程进行详细研究。发光可以是用于此目的的关键参数，因为它直接评估辐射复合。我们提出了在不同电压下工作器件的稳态绝对光致发光，作为研究钙钛矿器件损耗机制的工具。对绝对光子数的校准可以访问沿测量电位加权的相对辐射/非辐射复合的变化，并允许不仅在短路条件下而且在电流-电压曲线的每个点上识别电荷提取缺陷，我们在真空沉积的太阳能电池上展示。这些测量对于表征电荷损失的性质至关重要，这是开发改进这种光伏技术的方法的一个步骤。