Modulating the Electron Transporting Properties of Subphthalocyanines for Inverted Perovskite Solar Cells

The lack of organic non-fullerene ETMs with good electron transport and device stability is an important problem for the further development and commercialization of perovskite solar cells. Herein, the use of SubPcs as ETMs in PSCs is explored. To this end, we analyze the influence of SubPc peripher...

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Bibliographic Details
Published in:Frontiers in chemistry 2022-06, Vol.10, p.886522
Main Authors: Labella, Jorge, Momblona, Cristina, Čulík, Pavel, López-Serrano, Elisa, Kanda, Hiroyuki, Nazeeruddin, Mohammad Khaja, Torres, Tomás
Format: Article
Language:English
Subjects:
Chemistry
electron-transport materials
non-fullerene acceptor
perovskite solar cells
photovoltaics
subphthalocyanines
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Summary:The lack of organic non-fullerene ETMs with good electron transport and device stability is an important problem for the further development and commercialization of perovskite solar cells. Herein, the use of SubPcs as ETMs in PSCs is explored. To this end, we analyze the influence of SubPc peripheral functionalization on the efficiency and stability of PSCs. Specifically, ETMs based on three SubPcs (with either six or twelve peripheral fluorine and chlorine atoms) have been incorporated into PSCs with the perovskite layer deposited by solution processing (CsFAMAPbIBr). The device performance and morphology of these devices are deeply analyzed using several techniques, and the interfacial effects induced by the SubPcs are studied using photoluminescence and TR-PL. It is observed that the device stability is significantly improved upon insertion the SubPc layer. Moreover, the impact of the SubPc layer-thickness is assessed. Thus, a maximum power conversion efficiency of 13.6% was achieved with the champion device.
ISSN:2296-2646
2296-2646
DOI:10.3389/fchem.2022.886522