Jin, Seon-Mi Kim, Inhye Lim, Jung Ah Ahn, Hyungju Lee, Eunji 2024-01-20T04:04:00Z 2024-01-20T04:04:00Z 2021-09-05 2016-05-17 1616-301X https://pubs.kist.re.kr/handle/201004/124060 A simple and practical "solution-biphase method" allows the preparation of efficient charge-transporting 1D nanocrystals with coaxial p-n junctions. It involves gradual diffusion of a top layer of poor solvent (acetonitrile) into a bottom layer of poly(3-hexyl thiophene)-b-poly(2-vinyl pyridine) (P3HT-b-P2VP) conjugated polymers (CPs) and CdSe quantum dots (QDs) dissolved in chloroform. Initial interfacial crystallization-driven assembly of CPs results in the formation of seeds consisting of dimeric QDs transversely bridged by CPs. Coaxial CPs/QDs hybrid NWs are generated by 1D growth of QDs-dimeric seeds, enabling tracing of the CPs-crystallization process via the QDs. Thus, well-arranged QDs along the longitudinal axis of the NWs infer highly crystalline CPs with edge-on orientation, as confirmed by electron tomography, UV-vis spectroscopy, and grazing-incidence wide-angle X-ray scattering. This high cristallinity as well as the increased length of the resulting hybrid NWs in solution and the corresponding crystallite size in as-cast film represent a significant improvement compared to the conventional "one-pot addition method". Moreover, although randomly QDs-attached hybrids of P3HT homopolymer are produced by the solution-biphase method, branched aggregates with micrometer-long NW arms are generated from the crystal seeds containing multiple growth facets without precipitate, despite acetonitrile being a nonsolvent. English WILEY-V C H VERLAG GMBH HETEROJUNCTION SOLAR-CELLS LIGHT-EMITTING-DIODES BULK-HETEROJUNCTION STRUCTURAL EVOLUTION CHARGE-TRANSPORT X-RAY MORPHOLOGY POLY(3-HEXYLTHIOPHENE) PERFORMANCE NANOSTRUCTURES Interfacial Crystallization-Driven Assembly of Conjugated Polymers/Quantum Dots into Coaxial Hybrid Nanowires: Elucidation of Conjugated Polymer Arrangements by Electron Tomography Article 10.1002/adfm.201504964 1 ADVANCED FUNCTIONAL MATERIALS, v.26, no.19, pp.3226 - 3235 ADVANCED FUNCTIONAL MATERIALS 26 19 3226 3235 scie scopus 000377593000005 2-s2.0-84977826462 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article HETEROJUNCTION SOLAR-CELLS LIGHT-EMITTING-DIODES BULK-HETEROJUNCTION STRUCTURAL EVOLUTION CHARGE-TRANSPORT X-RAY MORPHOLOGY POLY(3-HEXYLTHIOPHENE) PERFORMANCE NANOSTRUCTURES conjugated polymer electron tomography hybrid nanowire interfacial crystallization-driven assembly solution-biphase method