| 초록 |
To realize high-performance flexible perovskite solar cells (PSCs), inorganic based photoelectrodes such as electron selective layers (ESL) should be processed at low temperatures. The TiO2 based layers are generally used due to the higher conductivity and transparency. The conventional TiO2 photoelectrodes of PSCs are prepared via a high-temperature sintering at 500 °C after deposition of the TiO2 paste on fluorine-doped tin oxide (FTO) glass. However, the plastic substrates cannot withstand a sintering process at a temperature above 150°C. Various low-temperature processes have been demonstrated such as chemical sintering, mechanical pressing, hydrothermal crystallization, electrophoretic deposition, microwave irradiation, ultraviolet (UV) light irradiation, near infrared (NIR) oven, and film transfer. However, most of these methods contain quite complicated multi-step processes, not proper for the rapid production of PSCs using the R2R process. We have developed several facile methods for the fabrication of efficient flexible solar cells on plastic substrates. In this talk, several strategies to address these issues will be introduced. |
