Back-contact structures for optoelectronic devices: Applications and perspectives

Zhenhai Yang, Jin Yan, Weichuang Yang, Yuheng Zeng, Jingsong Sun, Xinlong Wang, Xi Yang, J. C. Greer, Jiang Sheng, Baojie Yan, Jichun Ye

Research output: Journal PublicationReview articlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Article number105362
JournalNano Energy
Publication statusPublished - Dec 2020


  • Back-contact structure
  • Perovskite device
  • Photon recycling
  • c-Si solar Cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering


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