Improved electron transport in MAPbI3 perovskite solar cells based on dual doping graphdiyne

Highlights: • Graphdiyne was doped in both PCBM and ZnO films of perovskite solar cells. • The J-V hysteresis and stability were significantly improved. • Electrical conductivity, electron mobility and charge extraction ability were increased. • Film morphology of the electron transport layers was improved. The properties of electron transport layers play a crucial role in determining the performance of perovskite solar cells. Here we reported that graphdiyne doped in both PCBM and ZnO films of perovskite solar cells with an inverted structure based on MAPbI₃ for the first time. A high efficiency of 20.0% was achieved in MAPbI₃ perovskite solar cells. Moreover, the J-V hysteresis and stability were significantly improved as well. It was found that dual doping graphdiyne not only increased electrical conductivity, electron mobility, and charge extraction ability in the electron transport layers but also improved film morphology of the electron transport layers and reduced charge recombination which contribute to fill factor improvement. Therefore the results indicate that dual doping graphdiyne is a promising strategy to enhance perovskite solar cells performance.