| abstract |
The invention relates to a triphenylamine binaphthol copolymer, which belongs to the technical field of perovskite solar cells. The structural formula of the triphenylamine binaphthol copolymer is any one of the following formula I or formula II: Wherein, R in formula I and formula II is selected from H, Hydrocarbyl or alkoxy. The triphenylamine binaphthol copolymer can improve the hole mobility and provide enough carriers for PSCs; then introduce nitrogen and oxygen with lone pair electrons to passivate the perovskite layer and repair the perovskite film. defects, inhibit the decomposition of perovskite, and improve the stability of perovskite solar cell devices. The perovskite solar cell device prepared by using the triphenylamine binaphthol copolymer of the present invention as the hole transport layer has an energy conversion efficiency of 19.5% to 21.2%, and at the same time, the prepared perovskite solar cell device has excellent stability. |