Stark Effect in Perovskite/TiO2 Solar Cells: Evidence of Local Interfacial Order

Roiati, Vittoria and Mosconi, Edoardo and Listorti, Andrea and Colella, Silvia and Gigli, Giuseppe and De Angelis, Filippo (2014) Stark Effect in Perovskite/TiO2 Solar Cells: Evidence of Local Interfacial Order. Nano Letters, 14 (4). pp. 2168-2174. ISSN 1530-6984

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To unveil the mechanisms controlling photovoltaic conversion in high-performing perovskitebased mesostructured solar cells, we focus on the key role played by the mesoporous oxide/ perovskite interface. We employ several spectroscopic techniques to design a complete scenario and corroborate our results with first principle DFT calculations. In particular Stark spectroscopy, a powerful tool allowing interface-sensitive analysis, is employed to prove the existence of oriented permanent dipoles, consistent with the hypothesis of an ordered perovskite layer, close to the oxide surface. The existence of a structural order, promoted by specific local interactions, could be one of the decisive reasons for highly efficient carriers transport within perovskite films.

Item Type: Article
Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2014 American Chemical Society after peer review and technical editing by the publisher.
Uncontrolled Keywords: DFT investigations; hybrid solar cells; Perovskites; Stark spectroscopy
Subjects: 500 Scienze naturali e Matematica > 540 Chimica e scienze connesse
Depositing User: Francesca Cavazzini
Date Deposited: 10 Sep 2014 11:34
Last Modified: 10 Sep 2014 11:34

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