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

Alexander Schnegg, Jan Behrends, Matthias Fehr, Klaus Lips

Research output: Contribution to journalReview ArticleResearchpeer-review

22 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)14418-14438
Number of pages21
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number42
DOIs
Publication statusPublished - 14 Nov 2012
Externally publishedYes

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