Recombination pathways in polymer:fullerene photovoltaics observed through spin polarization measurements

Etherington, Marc, Wang, Jianpu, Chow, Philip C. Y. and Greenham, Neil C. (2014) Recombination pathways in polymer:fullerene photovoltaics observed through spin polarization measurements. Applied Physics Letters, 104 (6). 063304. ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.4865203

Abstract

We report magnetoconductance measurements on polymer:fullerene photovoltaic devices in the regime of high fields and low temperatures, where spin polarization of injected carriers plays an important role. The current either decreases or increases with magnetic field, depending on whether the interfacial charge-transfer state lies above or below the intramolecular triplet state in energy. Rapid transitions from triplet charge-transfer states to lower-lying triplet excitons constitute an important loss mechanism that is responsible for the negative magnetoconductance observed.

Item Type: Article
Subjects: F100 Chemistry
F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Ay Okpokam
Date Deposited: 10 Jan 2020 11:09
Last Modified: 10 Jan 2020 11:15
URI: http://nrl.northumbria.ac.uk/id/eprint/41875

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