Asymmetric Triphenylethylene-Based Hole Transporting Materials for Highly Efficient Perovskite Solar Cells
Julius Petrulevicius, Yi Yang, Cheng Liu, Matas Steponaitis, Egidijus Kamarauskas, Marytė Daškevičienė, Abdulaziz S. R. Bati, Tadas Malinauskas, Vygintas Jankauskas, Kasparas Rakštys, Mercouri G. Kanatzidis, Edward H. Sargent, Vytautas Getautis
Abstract
Molecular hole-transporting materials (HTMs) having triphenylethylene central core were designed, synthesized, and employed in perovskite solar cell (PSC) devices. The synthesized HTM derivatives were obtained in a two- or three-step synthetic procedure, and their characteristics were analyzed by various thermoanalytical, optical, photophysical, and photovoltaic techniques. The most efficient PSC device recorded a 23.43% power conversion efficiency. Furthermore, the longevity of the device employing V1509 HTM surpassed that of PSC with state-of-art spiro-OMeTAD as the reference HTM.