Title:
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Circumventing UV light induced nanomorphology disorder to achieve long lifetime PTB7-Th:PCBM based solar cells
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Author:
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Liu, Quan; Toudert, Johann; Liu, Fengqing; Mantilla Perez, Paola; Montes Bajo, Miguel; Rusell, Thomas P.; 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 |
Abstract:
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Aquest article pot ser utilitzat per a fins no comercials, d'acord amb els termes i condicions d’auto-arxiu de Wiley. |
Abstract:
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Large area flexible electronics rely on organic or hybrid materials prone to degradation limiting the device lifetime. For many years, photo-oxidation has been thought to be one of the major degradation pathways. However, intense illumination may lead to a burn-in or a rapid decrease in performance for devices completely isolated from corrosive elements as oxygen or moisture. The experimental studies which are presented in here indicate that a plausible triggering for the burn-in is a spin flip after a UV photon absorption leading to the accumulation of electrostatic potential energy that initiates a rapid destruction of the nanomorpholgy in the fullerene phase of a polymer cell. To circumvent this and achieve highly stable and efficient devices, a robust nanocrystalline ordering is induced in the PCBM phase prior to UV illumination. In that event, PTB7-Th:PC71BM cells are shown to exhibit T80 lifetimes larger than 1.6 years under a continuous UV-filtered 1-sun illumination, equivalent to 7 years for sunlight harvesting at optimal orientation and 10 years for vertical applications. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica -Àrees temàtiques de la UPC::Física -Photovoltaic power generation -Solar cells -Burn-in -Organic photovoltaics -PCBM -Photostability -PTB7-Th -Energia solar fotovoltaica -Cèl·lules solars |
Rights:
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Document type:
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Article - Submitted version Article |
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