Benzothiadiazole Aryl-amine Based Materials as Efficient Hole Carriers in Perovskite Solar Cells

Four hole transport materials (HTMs) based on a benzothiadiazole (BT) central core have been synthesized and successfully employed in triple-cation mixed-halide perovskite solar cells (PSCs), reaching 18.05% solar to energy conversion efficiency. The synthesis of these HTMs follows the push-and-pull...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2020-07, Vol.12 (29), p.32712-32718
Main Authors: Rodríguez-Seco, Cristina, Méndez, Maria, Roldán-Carmona, Cristina, Cabau, Lydia, Asiri, Abdullah M, Nazeeruddin, Mohammad Khaja, Palomares, Emilio
Format: Article
Language:English
Subjects:
Energy, Environmental, and Catalysis Applications
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Summary:Four hole transport materials (HTMs) based on a benzothiadiazole (BT) central core have been synthesized and successfully employed in triple-cation mixed-halide perovskite solar cells (PSCs), reaching 18.05% solar to energy conversion efficiency. The synthesis of these HTMs follows the push-and-pull approach to modulate the HOMO energy level by combining the BT group as an electron acceptor and diphenyl- and triphenyl-amines as electron donors. Here we show that despite adjusting the HOMO energy level to that of the perovskite is a believed requisite to achieve efficient interfacial hole transfer, additional factors must be taken into account to design novel and efficient HTMs, such as a high hole mobility, solubility in organic solvents, and thermal stability.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.0c07586