Performance measurements of photovoltaic devices, including metastable ones, should reflect as closely as possible the behaviour of these devices when deployed in the field, i.e. at constant illumination and fixed conditions. We review the wide-ranging behaviour observed in and previously proposed measurement solutions for perovskite solar cells (PSC) devices and further illustrate the variability during measurement with recent examples from our own experience. We propose a generic measurement protocol for PSC devices to ensure that electrical characterisation under simulated sunlight reflects real life conditions. The approach focusses on determining the steady-state maximum-power output under continuous illumination rather than relying on the I–V characteristics. Given the large variations in device behaviour, this protocol is particularly suitable in cases where a priori information about the devices under test is not available. We conclude that the approach to the electrical characterisation of PSC devices should shift from traditional I–V curves to the maximum-power output under steady-state conditions. The latter is the simplest and most reliable method to evaluate, assess and compare PSC technologies when power and efficiency reporting are required. This protocol also contributes to harmonising comparison between different calibration laboratories thus contributing to increased confidence in the results.

光伏器件（包括亚稳态器件）的性能测量应尽可能反映这些器件在现场部署时的行为，即在恒定光照和固定条件下。我们回顾了在钙钛矿太阳能电池 (PSC) 设备的测量解决方案中观察到的和以前提出的测量解决方案中观察到的广泛行为，并通过我们自己的经验中最近的例子进一步说明了测量过程中的可变性。我们提出了 PSC 设备的通用测量协议，以确保模拟阳光下的电气特性反映现实生活条件。该方法侧重于确定连续照明下的稳态最大功率输出，而不是依赖于I - V特征。鉴于设备行为的巨大变化，该协议特别适用于有关被测设备的先验信息不可用的情况。我们得出结论，PSC 器件的电气特性方法应该从传统的I - V曲线转变为稳态条件下的最大功率输出。当需要功率和效率报告时，后者是评估、评估和比较 PSC 技术的最简单、最可靠的方法。该协议还有助于协调不同校准实验室之间的比较，从而有助于提高对结果的信心。