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Issue 42, 2012
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Pulsed electrically detected magnetic resonance for thin film silicon and organic solar cells

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Abstract

In thin film solar cells based on non-crystalline thin film silicon or organic semiconductors structural disorder leads to localized states that induce device limiting charge recombination and trapping. Both processes frequently involve paramagnetic states and become spin-dependent. In the present perspectives article we report on advanced pulsed electrically detected magnetic resonance (pEDMR) experiments for the study of spin dependent transport processes in fully processed thin film solar cells. We reflect on recent advances in pEDMR spectroscopy and demonstrate its capabilities on two different state of the art thin film solar cell concepts based on microcrystalline silicon and organic MEH-PPV:PCBM blends, recently studied at HZB. Benefiting from the increased capabilities of novel pEDMR detection schemes we were able to ascertain spin-dependent transport processes and microscopically identify paramagnetic states and their role in the charge collection mechanism of solar cells.

Graphical abstract: Pulsed electrically detected magnetic resonance for thin film silicon and organic solar cells

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Publication details

The article was received on 19 Apr 2012, accepted on 08 Aug 2012 and first published on 08 Aug 2012


Article type: Perspective
DOI: 10.1039/C2CP41258F
Phys. Chem. Chem. Phys., 2012,14, 14418-14438

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    Pulsed electrically detected magnetic resonance for thin film silicon and organic solar cells

    A. Schnegg, J. Behrends, M. Fehr and K. Lips, Phys. Chem. Chem. Phys., 2012, 14, 14418
    DOI: 10.1039/C2CP41258F

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