"Interface Engineering for Maximizing the Efficiency of Halide Perovskite Indoor Photovoltaics"

室内光伏（IPVs）设备将建筑物内的白光LED和荧光灯等人造光源的光转换为电能。由于IPVs在物联网（IoT）这一庞大的技术领域的应用前景，最近受到了广泛的研究关注。到2025年，将有超过750亿个连接的物联网设备，其中一半的组件将安装在建筑物内。可持续地为这些传感器供电是一个巨大的挑战。光能在周围环境中可用，并且可以通过光伏设备轻松获取，而无需额外的设备或多次能量传输，因此成为最有希望为物联网传感器系统供电的候选者。根据输入光谱的不同，室内光伏的功率转换效率的Shockley-Queisser （S-Q）极限为45- 65%。实现理论效率的主要限制因素之一是高开路电压（Voc）损耗。在这个项目中，我们将研究界面工程的作用，以尽量减少这些开路电压在卤化物钙钛矿室内光伏器件。研究了光活性材料的体界面和光活性层/输电荷层的埋藏界面。光生载流子动力学将通过瞬态光伏测量（如瞬态电流、瞬态光电压）进行表征，这些载流子的迁移率将通过空间电荷限制电流法进行研究，界面作用将使用光伏器件的阻抗谱与体隔离。

Indoor photovoltaic (IPVs) devices convert light from artificial light sources such as white LED and fluorescent lamps inside the buildings to electrical energy. IPVs are receiving great research attention recently due to their projected application in the huge technology field of the Internet of Things (IoT). By 2025, there will be more than 75 billion connected IoT devices with half of the components to be installed inside the buildings. Sustainably powering these sensors is a huge challenge. Light energy is available in the ambient environment and can be accessed easily via photovoltaic devices without requesting additional devices or multiple energy transfer, thus becomes the most promising candidate to power IoT sensor system. The Shockley-Queisser (S-Q) limit of power conversion efficiency of indoor photovoltaic is 45- 65 % depending on the input light spectrum. One of the main limiting factors in achieving theoretical efficiency is the high open-circuit voltage (Voc) losses. In this project, we will investigate the role of interface engineering to minimize these open-circuit voltages in halide perovskite indoor photovoltaic devices. Both the bulk interface in the photoactive materials and the buried interface at the photoactive layer/charge-transporting layers will be studied. The photogenerated carrier dynamics will be characterised using transient photovoltaic measurements such as transient current, transient photovoltage, and mobility of these carriers will be investigated through space charge limited current method and interface role will be isolated from the bulk using the impedance spectroscopy of the photovoltaic devices.