Interdigitated back contact (IBC) structures formed by integrating two functional materials of opposite polarity on the rear side of device have attracted a significant attention for optoelectronic device design. Currently, this type of IBC design has been widely developed with a variety of applications in the photovoltaic (PV) community and associated fields. In terms of PV devices, the IBC designs can eliminate the need for a front electrode, endowing a potential in high power conversion efficiency. Moreover, by opening the front surface on IBC structures provides a platform for further designs, which enables us to realize a series of derived applications. This review summarizes the recent progress in IBC based PV devices, including c-Si solar cells (SCs), perovskite SCs, and perovskite/c-Si tandem SCs. Furthermore, the focus herein is focused on the latest advances in the specific applications in the studies of photon recycling, and in-situ/in-operando measurements of photoelectric properties. Finally, a perspective into the remaining challenges and future opportunities to accelerate the practical applications of IBC devices is highlighted.

通过在器件背面集成两种相反极性的功能材料而形成的叉指背接触（IBC）结构已引起了光电器件设计的极大关注。当前，这种类型的IBC设计已经被广泛开发，并在光伏（PV）社区和相关领域中具有多种应用。在光伏设备方面，IBC设计可以消除对前电极的需求，从而为高功率转换效率赋予了潜力。此外，通过在IBC结构上打开前表面，可以为进一步设计提供平台，这使我们能够实现一系列派生应用。这篇综述总结了基于IBC的PV器件的最新进展，这些器件包括c-Si太阳能电池（SC），钙钛矿SC和钙钛矿/ c-Si串联SC。此外，光电性能的原位/操作数测量。最后，着重介绍了加速IBC设备实际应用的剩余挑战和未来机遇。