Back-contact structures for optoelectronic devices: Applications and perspectives

摘要

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.