AUTHOR=Isci Recep , Unal Melis , Yesil Tamer , Ekici Alper , Sütay Berkay , Zafer Ceylan , Ozturk Turan 

TITLE=Thieno[3,2-b]thiophene and triphenylamine-based hole transport materials for perovskite solar cells

JOURNAL=Frontiers in Materials

VOLUME=Volume 10 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2023.1125462

DOI=10.3389/fmats.2023.1125462

ISSN=2296-8016

ABSTRACT=Heterocyclic compounds have played significant roles in achieving high performance as hole transport materials (HTMs) for perovskite solar cell (PSC) applications. Various studies have focused on the development of fused heterocyclic conjugated structures for HTMs. In this report, three novel π-extended conjugated materials (M1-M3), based on thieno[3,2-b]thiophene (TT) and 4,4′-dimethoxytriphenylamine (TPA(OMe)2), were designed and successfully synthesized via Palladium (0) catalyzed Suzuki coupling reaction. Their optical, electrochemical and thermal properties were investigated by UV-Vis, fluorescence, cyclic voltammetry, and thermal analysis. The materials were utilized as HTMs in p-i-n architecture perovskite solar cells, which displayed performances of open-circuit voltage (Voc) as high as 1050 mV, a maximum short-circuit current (Jsc) of 16,9 mA/cm2, a maximum fill factor (FF) of 29,3%, and a power conversion efficiency (PCE) of 5.20%. This work demonstrated that TT and TPA(OMe)2 based structures are promising cores for high performance HTMs in PSC architecture.