Magnetic-field-controlled charge transport in organic polymer composites

Krinichnyi, V.I.; Yudanova, Evgeniya I.

doi:10.1016/j.cplett.2021.138787

Cited by 1 publication

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“…The g-strain originates in the Gaussian form of the respective term of eq 1 that becomes most noticeable at millimeter waveband LEPR. 34 The analysis of LEPR data obtained for the analogous charge carriers excited in the P3HT:PC 61 BM BHJ at a wide MW frequency range 53 allowed to postulate the last factor to be prevalence to the effective broadening of polymer:methanofullerene millimeter waveband LEPR spectra. Extrapolation to the ω e → 0 limit gives line widths, ΔB pp (0) = 0.101 and 0.066 mT, is typical for these charge carriers in such systems.…”

Section: Resultsmentioning

confidence: 99%

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite

2022

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We report the light-induced electron paramagnetic resonance (LEPR) and optics study of spin charge carriers initiated by light photons with the energy of 1.34–4.52 eV in the initial and slightly acene-treated composites of a regioregular poly(3-dodecylthiophene) (P3DDT) with a [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM). Light irradiation leads to the formation in both polymorphs of spin charge carriers, polarons, and methanofullerene radical anions. Magnetic resonance, relaxation, and dynamic parameters of such carriers depend on the energy of exciting light photons as well as on a balance of a chaotically structured polymer α-polymorph with spin traps and a more structured its β-polymorph. The charge carriers, photoinitiated in the α-polymorph, are characterized by an extreme dependence of their main parameters from the energy of exciting photons. The increase in the concentration and stability of both mobile charge carriers were reached upon modification of the initial composite by the simplest conjugated acenes. The greatest effect was registered for the composite, weakly doped by naphthalene molecules. The concentration and other properties of charge carriers photoinitiated in a modified composite were found to correlate with the band structure of the acene introduced. Such an effect was interpreted in favor of a triggerlike polymorphic α–β transition stipulated in the system by planar acene molecules. It leads to an acceleration of spin–lattice relaxation of mobile charge carriers, a decrease in the anisotropic diffusion of polarons between polymer chains, and a slow down of the recombination of charge carriers. This opens horizons to use optimally acene-doped polymers and their composites for the creation of electronic and spintronic devices with spin-photon-assisted parameters.

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Section: Resultsmentioning

confidence: 99%

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite

2022

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Magnetic-field-controlled charge transport in organic polymer composites

Cited by 1 publication

References 21 publications

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite

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Magnetic-field-controlled charge transport in organic polymer composites

Cited by 1 publication

References 21 publications

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC61BM Composite

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC61BM Composite

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Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite

Light-Induced EPR Study of Polymorphic Acene-Stipulated Transition in P3DDT:PC₆₁BM Composite