Ultralong-Range Polaron-Induced Quenching of Excitons in Isolated Conjugated Polymers
作者： J. C. Bolinger , M. C. Traub , T. Adachi , P. F. Barbara
关键词: Molecular physics 、 Quenching (fluorescence) 、 Condensed matter physics 、 Order of magnitude 、 Exciton 、 Conjugated system 、 Spontaneous emission 、 Polaron 、 Range (particle radiation) 、 Diffusion 、 Chemistry
摘要: In conjugated polymers, radiative recombination of excitons (electron-hole pairs) competes with nonradiative thermal relaxation pathways. We visualized exciton quenching induced by hole polarons in single-polymer chains a device geometry. The distance-scale for was measured means new subdiffraction, single-molecule technique—bias-modulated intensity centroid spectroscopy—which allowed the extraction mean shift 14 nanometers highly ordered, nanodomains. This requires energy transfer over distances an order magnitude greater than previously reported bulk polymers and far predicted standard mechanism quenching, unbiased diffusion free to sites. Instead, multistep “energy funneling” trapped, localized is probable polaron-induced quenching.
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