Topic
Bipolaron
About: Bipolaron is a research topic. Over the lifetime, 1335 publications have been published within this topic receiving 29154 citations. The topic is also known as: bipolarons.
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TL;DR: In this article, the authors show that the conductivity of the 6T +. salt is weakly temperature dependent, with an activation energy of 32 meV above 100 K and a tendency to level Dff at lower temperatures.
Abstract: Oxidative doping of individual thiophene oligomers nT (n = 3 to 6) with FeC13 in dilute CH 2 Cl 2 solution generates the corresponding radical cations (polarons) nT +. . as evidenced by in-situ visible/near infrared absorption and electron spin resonance spectroscopies. The nT + . species in solution progressively precipitate as conducting (0′300K = 10 −1 −10 −2 S/cm) and strongly paraaagnetic radical cation salts (g = 2.003, ΔH PP ∼ 4–8 G). The conductivity of the 6T +. salt is weakly temperature dependent, with an activation energy of 32 meV above 100 K and a tendency to level Dff at lower temperatures. In the case of the sexithienyl radical 6T +. , further doping results in the quantitative conversion into the dication 6T ++ (bipolaron).
3 citations
TL;DR: In this paper, the single excited state of a polaron in polymers has been studied and it was found that its polarization is negative under an external electric field and the inversed polarization will disappear under a strong electric field.
Abstract: The single excited state of a polaron in polymers has been studied. It was found that its polarization is negative under an external electric field. The single excited state of a polaron has a similar behavior with that of a biexciton. The inversed polarization will disappear under a strong electric field and the single excited state of a polaron will dissociate into a polaron and a bipolaron.
3 citations
TL;DR: In this article, a model in which the low-temperature bipolaron ordered phase of Ti4O7 is suppressed with low concentrations of substitutional vanadium as a result of microdomain formation was proposed.
Abstract: We propose a model in which the low-temperature bipolaron ordered phase of Ti4O7 is suppressed with low concentrations of substitutional vanadium as a result of microdomain formation.
3 citations
TL;DR: In this article, an organic field-effect transistor with a magnetoresistance effect whose sign could be tuned by the applied voltage was reported, and the interplay of both MR components resulted in a voltage-dependent MR with sign change.
3 citations