| 초록 |
Perovskite hybrid solar cells have recently been the subject of extensive investigations. Mixed perovskites, such as CH3NH3PbI3-xClx, display a long electron diffusion length and a high light absorption profile. Generally, perovskite solar cells consist of the structure: transparent fluorine-doped SnO2 (FTO) substrate / compact layer / perovskites / hole transport material (HTM) / Au electrode. Here, We report a novel D–A type conducting polymeric HTM (TTB-TTQ) based on thiophene and benzothiadiazole as an alternative to spiro-MeOTAD. The resulting polymer was highly soluble in many organic solvents and exhibited excellent film formability. We demonstrated a perovskite solar cell with the highest power conversion efficiency yet achieved in such cells, 14.1 %, which is 22.6 % greater than that of a device employing a spiro-MeOTAD. |
