A multi-level theoretical protocol is developed to characterize the charge transport of a novel indoloindole-based hole-transporting material. The implications of molecular shape, dynamic disorder and amorphousness on the hole mobilities are discussed.
This study challenges HOMO level engineering approaches to SAM design by demonstrating that this leads to reduced quasi-Fermi level splitting in the perovskite and thus lower open-circuit voltage and performance.
Hole-transporting material (HTM) plays an important role in PSCs. We report a novel and low-cost, bifluorenylidene-based HTM, denoted as sp-35, which achieved a high PCE of 21.59% and demonstrated good long-term stability compared to spiro-OMeTAD.
This review explores different paths to replace traditional HTMs, it discusses recent advancements in conjugated organic-HTMs, organic-SAMs and polymeric-HTMs, aiming to improve the efficiency and stability of lead and tin-based PSCs.
The photophysical characterisation of various HTMs in the presence of FK209 or LiTFSI + TBP dopants reveals different interactions among the additives and the HTMs. FK209 shows close association with HTMs, while LiTFSI + TBP shows a weaker binding