Interface modification using a post-treatment-free heteropolyacid for effective charge selective bilayer formation in perovskite solar cells

Saianand, G., Gopalan, A.-I., Vellaisamy, R. A.L. , Wilson, G. J., Jakmunee, J., Sonar, P., Lin, L., Kim, S.-W. and Kang, S.-W. (2020) Interface modification using a post-treatment-free heteropolyacid for effective charge selective bilayer formation in perovskite solar cells. Materials Letters, 277, 128393. (doi: 10.1016/j.matlet.2020.128393)

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Abstract

We rationally utilized a solution-processed post-heat treatment-free heteropolyacid compound, phosphomolybdic acid hydrate (PMAH) as a charge selective interface modifier for poly(3,4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT:PSS) in inverted perovskite solar cells (PSCs). The fabricated PSCs with PMAH/PEDOT:PSS bilayer exhibited significant improvement in the power conversion efficiency (PCE) (∼12%) with superior long-term air-stability as compared to PEDOT:PSS based PSCs (9.8%). The measured photovoltaic performance demonstrates that the inclusion of PMAH as an interface to ITO and PEDOT:PSS is an efficient way of realizing stable and efficient PSCs.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vellaisamy, Professor Roy
Creator Roles:
Authors: Saianand, G., Gopalan, A.-I., Vellaisamy, R. A.L., Wilson, G. J., Jakmunee, J., Sonar, P., Lin, L., Kim, S.-W., and Kang, S.-W.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Materials Letters
Publisher:Elsevier
ISSN:0167-577X
ISSN (Online):1873-4979
Published Online:24 July 2020

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