Flexible Perovskite Photovoltaics: Progress, Commercialization and Prospects

Abstract

At present，promoting the transition of the energy industry to a system that is effective，clean，and flexi⁃ ble has currently emerged as the key to tackling the world 's environmental issues. The progress of the Internet of Things and the technology revolution have created a new demand to combine solar equipment and cells into a single component in order to collect energy in a wider range of application situations. Flexible perovskite solar cells（FP⁃ SCs）based on flexible polymers such as polyethylene terephthalate（PET）and polyethylene naphthalate（PEN）have emerged as a rising star in the third generation of solar cells in the past decade due to their high energy conversion ef⁃ ficiency，high flexibility，low preparation cost and certain portability. In addition，it has a natural affinity for envi⁃ ronmentally friendly and economically beneficial roll-to-roll manufacturing technology which will enable it to play a key role in the development of flexible self-powered electronic products，large-scale building integrated photovoltaic （BIPV）and space aerospace. In this review，we emphatically discuss the critical role and briefly summarize the most recent developments of the flexible transparent conductive substrate，low-temperature processed charge trans⁃ porting layer，and mechanically resilient perovskite film in single and tandem FPSCs. Finally，combined with the large-scale manufacturing technology of FPSCs，we offer some insight into the reliability and operational stability of the package and discuss potential practical applications in large-area modules and so forth.