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Hole transporting materials (HTMs) play a crucial role in developing highly efficient and stable perovskite solar cells (PSCs). Their function is to extract and transport hole carriers, but at the same time protect the perovskite layer from environmental conditions (n–i–p PSCs). Therefore, there is a need to develop new HTMs to better balance all of the above functions and performances to make efficient, stable and possibly low-cost PSCs. To address these issues, we studied the structure–performance relationship of a series of recently synthesized star-shaped molecules characterized by a dibenzofulvene core, a thiophene ring and three arylamino moieties, but varying in size (thiophene number) and shape (anchoring position of arylamines to the core). By the interplay between size and shape, we managed to tune the hole mobility by up to three orders of magnitude, and our best compound (T2N3) showed a zero-field …
Royal Society of Chemistry
Publication date: 
1 Jan 2022

M Leoncini, A-L Capodilupo, D Altamura, C Giannini, G Accorsi, E Fabiano, A Rizzo, G Gigli, S Gambino

Biblio References: 
Volume: 10 Issue: 15 Pages: 5981-5993
Journal of Materials Chemistry C