Abstract
Organometal trihalide perovskite solar cells (PSCs) already reached certified power conversion efficiency greater than 22% in laboratory-scale devices. These direct band gap perovskite light absorbers possess novel intrinsic properties such as tunable band gap, high optical absorption, and long diffusion length. Low-temperature solution processing of perovskite absorber film with excellent requisite properties makes this wonder material ideal choice for next-generation low-cost high-performance flexible solar cells. Flexible PSCs have potential to reach niche markets namely portable power sources, lightweight drones, reflectors, etc. Compared to other flexible photovoltaic technologies, complexity of fabricating flexible perovskite solar devices is minimal and cost-effective. In this chapter, a review on material selection and processing, device architecture, thin-film deposition techniques, and stability pertinent to flexible PSCs have been discussed. Up-to-date progress and commercialization techniques such as batch processing and roll-to-roll processing of flexible PSCs are briefed. Potential applications of these flexible PSCs in the niche markets are also discussed.
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