Hole-transporting organic materials for perovskite solar cells (PSCs)

Abstract

Researchers are currently interested in Phenothiazine (PTZ) based hole transporting materials (HTMs) because this can provide HTMs with high power conversion efficiency at a low cost. The main aim of the thesis is to design and synthesize PTZ-based hole-transporting materials (HTMs) for perovskite solar cells named PTZ-I and PTZ-II with the help of Buchwald–Hartwig cross coupling reaction. Both the molecules are characterized by using different analytical techniques, such as mass spectrometry and 1H and 13C NMR spectroscopy. We also investigate the photophysical properties and theoretical studies of PTZ-I and PTZ-II. We observed that PTZ-II shows a redshift in UV vis absorption spectroscopy because it has a more conjugated system than PTZ I. Furthermore, Density Functional Theory (DFT) demonstrates that the HOMO and LUMO level of both HTMs are located on sidearms (An and TPA) groups and PTZ (core) respectively.