Facile design hydrazone-based Spiro-OMeTAD alternative hole transporting material for perovskite solar cells

Abstract

Hydrazone-based hole transporting material (V1375) has been synthesized using straightforward two-step procedure from commercially available and inexpensive starting reagents, mimicking synthetically challenging 9,9'-spirobifluorene moiety of well-studied Spiro-OMeTAD. Power conversion efficiency over 24% with improved stability has been achieved by employing the V1375 as a novel HTM in perovskite solar cells.