Wide-bandgap perovskite solar cells (PVSCs) possess significant potential in providing reliable power sources for applications in the Internet of Things (IoT) ecosystem under indoor light illumination. However, the wide-bandgap PVSCs usually suffer from photo-induced phase segregation and non-radiative energy loss caused by the Shockley-Read-Hall (SRH) type trap-assisted recombination at the interfaces in the devices. To address these issues, a simple strategy by applying phenethylammonium halides to reduce the energy loss and suppress the phase segregation of wide-bandgap PVSCs is developed. The devices incorporated with phenethylammonium chloride (PEACl) is revealed to achieve a high open-circuit voltage (V_OC) of 1.26 V, leading to a merit power conversion efficiency (PCE) of 18.3%, which is the best performance among the inverted wide-bandgap PVSCs (∼1.75 eV) under one sun illumination. Meanwhile, the photovoltaic performance of the device is also significantly enhanced, especially under a white light-emitting diode (LED) with an illumination of 1000 lux, showing a PCE of 35.6% with a high V_OC of 1.08 V. Impressively, the device delivers a minimum energy loss of 670 meV, which is among the smallest value reported for perovskite-based indoor photovoltaics.

宽带隙钙钛矿太阳能电池（PVSC）在为室内光照明下的物联网（IoT）生态系统中的应用提供可靠的电源方面具有巨大的潜力。但是，宽带隙PVSC通常遭受光诱导的相分离和由器件接口处的Shockley-Read-Hall（SRH）型陷阱辅助重组引起的非辐射能量损失。为了解决这些问题，开发了一种简单的策略，即通过应用苯乙铵卤化物来减少能量损失并抑制宽带隙PVSC的相分离。揭示了与氯化苯乙铵（PEACl）结合使用的器件可实现高开路电压（V _OC）的1.26 V电压）导致优异的功率转换效率（PCE）为18.3％，这是在一个阳光照射下倒置的宽带隙PVSC（〜1.75 eV）中最好的性能。同时，该装置的光电性能也显著增强，尤其是在一个白色发光二极管（LED）1000勒克司的照度，示出具有高的35.6％的PCE V _OC 1.08 V.令人印象深刻的，该装置的具有670 meV的最小能量损耗，这是钙钛矿型室内光伏设备报告的最小值。