Post-functionalization of polyvinylcarbazoles: An open route towards hole transporting materials for perovskite solar cells

We report on the potential of tuning poly(9-vinylcarbazole) (PVK) properties through functionalization for an application as hole transport material (HTM) for perovskite solar cells (PSCs). The synthesized PVK-based polymers were substituted with moieties of interest to improve the solubility, the charge transport properties, or to tune energy levels. Bis(4-methoxyphenyl)amine moieties were found to improve the hole mobility and to increase the HOMO level of the PVK. Therefore, PSCs employing PVK-[N(PhOCH₃)₂]₂ as HTM exhibited a best PCE of 16.7%. Compared to spiro-OMeTAD, first studies have shown that PVK-[N(PhOCH₃)₂]₂ could extend PSC lifetime.

C. GEFFROY, E. GRANA, M. MUMTAZ, L. COJOCARU, E. CLOUTET, C. OLIVIER, S. UCHIDA, T. TOUPANCE, H. SEGAWA, G. HADZIIOANNOU

Solar Energy, Volume 193, Pages 878-884, https://doi.org/10.1016/j.solener.2019.10.034 2019