PMID: 19113579Dec 31, 2008Paper

Magnetic field effects in pi-conjugated polymer-fullerene blends: evidence for multiple components

Physical Review Letters
F J WangZ V Vardeny

Abstract

We studied magnetoconductance (MC) and magnetoelectroluminescence (MEL) in organic diodes from blends of pi-conjugated polymers and fullerenes at various concentrations, c. The MC response is composed of several components that depend on the applied bias voltage and c. A dominant positive low-field (LF) component, which also governs the MEL response, dramatically decreases and broadens in the blends, thus unraveling a positive high-field and negative LF components. The positive MC components are caused by electrostatically bound e-h polaron pairs in unblended devices, and charge transfer pairs in the blends, which are dominated by two different field-induced spin sublevel mixing mechanisms. In contrast, the negative LF response is due to e-e and h-h pairs; this is confirmed by studying MC in electron- and hole-unipolar devices, which lack positive MC response.

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Citations

Sep 5, 2013·Nature Nanotechnology·Christoph Boehme, John M Lupton
Aug 24, 2011·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Bert KoopmansMarkus Wohlgenannt
Mar 19, 2014·The Journal of Chemical Physics·J H OjedaD Laroze
May 31, 2016·The Journal of Physical Chemistry Letters·Chee Kong LeeAdam P Willard
Aug 26, 2014·Scientific Reports·Wei QinShenqiang Ren
Feb 16, 2010·Nature Materials·Tho D NguyenZ Valy Vardeny
Nov 15, 2012·Nature Communications·Jianpu WangNeil C Greenham
Mar 5, 2015·Nature Communications·Stoichko D DimitrovJames R Durrant
Jan 15, 2011·Physical Review Letters·T D NguyenZ V Vardeny
Jun 12, 2012·Physical Review Letters·N J Harmon, M E Flatté
Apr 12, 2013·Chemical Communications : Chem Comm·Evgeny TatarovJosef Salbeck
Sep 26, 2019·Faraday Discussions·Tobias GrünbaumJohn M Lupton
Sep 4, 2012·Physical Chemistry Chemical Physics : PCCP·Alexander SchneggKlaus Lips
Oct 2, 2009·Physical Review Letters·F L BloomB Koopmans
Apr 8, 2021·Nature Communications·Tobias ScharffJohn M Lupton
Nov 10, 2017·ACS Omega·Marco Antonio Cabero ZabalagaWeisheng Zhao
Jul 25, 2019·ACS Applied Materials & Interfaces·Xiaojie LiuZ Valy Vardeny

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