Influence of spin-spin exchange on charge transfer in PANI-ES/P3DDT/PCBM composite
作者： V.I. Krinichnyi , E.I. Yudanova , B. Wessling
DOI: 10.1016/J.SYNTHMET.2013.07.008
关键词:
摘要: Abstract The first results of the light-induced EPR study magnetic, relaxation and dynamic parameters charge carriers stabilized in emeraldine salt form polyaniline (PANI-ES) highly doped with sulfuric (SA) para -toluenesulfonic ( p TSA) acids, spin pairs background photoinitiated bulk heterojunctions formed by poly(3-dodecylthiophene) [6,6]-phenyl-C 61 -butyric acid methyl ester (P3DDT/PCBM) as well appropriate PANI-ES/P3DDT/PCBM composites are described. Main magnetic resonance for positively charged polarons both polymer backbones negatively methanofullerene ion-radical P3DDT/PCBM were determined separately from deconvoluted LEPR spectra. These shown to be governed conformation PANI-ES chains which determines insulating conducting forms PANI-SA PANI- TSA samples, respectively. effective absorption peak-to-peak line width was described terms exchange interaction hopping along neighboring solitary PANI P3DDT nanoparticles. Paramagnetic susceptibility such interpreted framework model coupled differently distributed parental matrices. Exchange increases dramatically network is replaced one triple composite. This deepens overlapping wave functions matrices leads increase energy barrier they overcome crossing a acceleration spin–lattice TSA. Polaron diffusion govern anion radicals rotating between its chains.
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