Abstract: The highest certified power conversion efficiency (25.8%) of perovskite solar cells (PSCs) has rivalled that of silicone-based solar cells. However, the long-term stability of PSCs should be improved for commercial applications. Electropolymerisation is an effective method for preparing electroactive and/or conducting polymeric films which allows for a simple way to reduce the cost of materials and devices. Moreover, chemically crosslinked electropolymerised films can effectively improve the stability of PSCs. This review summarises the applications of cross-linked electropolymerised films as hole- or electrontransporting layers (HTLs or ETLs) for highly efficient and stable PSCs. Lastly, the future development of PSCs with electropolymerised films is discussed. 

Key words: electropolymerisation, perovskite, solar cell, stability