Abstract

Flexible solar cells, which play an important role in the development of third-generation solar cells, have been extensively studied by researchers in recent years. Metal oxides are one of the most critical components of third-generation solar cells. Third-generation solar cells are divided into organic/polymer solar cells (OSC), dye-sensitized solar cells (DSSCs), perovskite solar cells (PSC), and quantum dot solar cells (QDSC). In third-generation solar cells, metal oxide electron collector layers are generally responsible for the transport of electrons. Other important tasks of metal oxide layers are to ensure consistency between components; these include sensitizers in DSSCs, organic dye in OSCs, organic-inorganic perovskite in PSCs, quantum dots in QDSCs, stimulated by the sun, and flexible transparent substrates. This chapter discusses the uses, processes, effects, and difficulties of metal oxides in flexible solar cells.