| 摘要： |
Chlorine-substituted graphdiyne (ClGD) is employed into electron transport layers (ETLs) of MAPbI(3)-based perovskite solar cells for the first time, forming a high-quality film with superior film morphology and electrical conductivity as compared with pristine [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) film. Strikingly, a champion power conversion efficiency of 20.34% is achieved, showing a 19% enhancement compared with the counterparts (17.08%). Simultaneously, ClGD-PCBM-based devices show suppressed J-V hysteresis. It is experimentally and theoretically demonstrated that the interactions of derivated graphdiyne and PCBM stem from four types of noncovalent bonds, which contribute to the improved device performance. The results suggest that derivated graphdiyne-based interfacial material is promising for the applications in solar cells and other photoelectric devices. |
