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Analysis of the Hysteresis Behavior of Perovskite Solar Cells with Interfacial Fullerene Self-Assembled Monolayers

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Valles Pelarda, Marta and Clasen Hames, Bruno and García Benito, Inés and Almora, Osbel and Molina Ontoria, Agustín and Sánchez, Rafael S. and García Belmonte, Germà and Martín, Nazario and Mora Sero, Iván (2016) Analysis of the Hysteresis Behavior of Perovskite Solar Cells with Interfacial Fullerene Self-Assembled Monolayers. Journal of physical chemistry letters, 7 (22). pp. 4622-4628. ISSN 1948-7185

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Official URL: http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b02103



Abstract

The use of self-assembled monolayers (SAMs) of fullerene derivatives reduces the hysteresis of perovskite solar cells (PSCs). We have investigated three different fullerene derivatives observing a decrease on hysteresis for all the cases. Several processes can contribute to the hysteresis behavior on PSCs. We have determined that the reduced hysteresis observed for devices with SAMs is produced by a decrease of the capacitive hysteresis. In addition, with an appropriated functionalization, SAMs can increase photocurrent even when no electron selective contact (ESC) is present and a SAM is deposited just on top of the transparent conductive oxide. Appropriated functionalization of the fullerene derivative, as introducing −CN groups, can enhance cell performance and reduce hysteresis. This work paves the way for a future enhancement of PSCs by a tailored design of the fullerene molecules that could actuate as an ESC by themselves.


Item Type:Article
Uncontrolled Keywords:Fullerenes; Hysteresis; Monolayers; Perovskite; Perovskite solar cells; Solar cells
Subjects:Sciences > Chemistry > Chemistry, Organic
ID Code:41712
Deposited On:07 Mar 2017 16:16
Last Modified:01 Nov 2017 00:01

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