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Title:
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UV-induced oxygen removal for photostable, high-efficiency PTB7-Th:PC71BM photovoltaic cells
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Author:
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Liu, Quan; Mantilla Perez, Paola; Montes Bajo, Miguel; Romero Gómez, Pablo; Martorell Pena, Jordi
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
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Abstract:
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This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS applied materials and interfaces, copyright © American Chemical Society, after peer review and technical editing by the publisher and may be found at
http://dx.doi.org/10.1021/acsami.6b07985 |
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Abstract:
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Solution-processed ZnO sol–gel or nanoparticles are widely used as the electron-transporting layer (ETL) in optoelectronic devices. However, chemisorbed oxygen on the ZnO layer surface has been shown to be detrimental for the device performance as well as stability. Herein, we demonstrate that chemisorbed oxygen removal based on UV illumination of the ZnO surface layer under a nitrogen atmosphere can, simultaneously, improve the power conversion efficiency and photostability of PTB7-Th:PC71BM-based inverted polymer solar cells. By a systematic study of such a UV illumination procedure, we obtained optimal conditions where both the cell efficiency and stability were improved. We fabricated cells with a power conversion efficiency higher than 9.8% and with a T80 lifetime longer than 500 h, corresponding to about a 2.5-fold enhancement relative to non-UV-treated ZnO reference devices. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Física
-Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica
-Photovoltaic power generation
-Solar cells
-Polymer solar cells
-PTB7-Th
-Photostability
-Sol-gel ZnO
-Molecular oxygen
-Energia solar fotovoltaica
-Cèl·lules solars |
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Rights:
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Document type:
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Article - Submitted version
Article |
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