Solution-Based Large-Area Assembly of Coaxial Inorganic–Organic Hybrid Nanowires for Fast Ambipolar Charge Transport
| Autor: | Dania Ramirez, Grant T. Olson, Ryan Y. Cox, Kyle S Barcus, Michaela R. Pfau, Shanju Zhang, Nima Eshaghi, Raymond H. Fernando |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Phase transition Materials science business.industry Ambipolar diffusion Nanowire Nanotechnology 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Electron transfer Chemical engineering chemistry Photovoltaics Liquid crystal General Materials Science Coaxial 0210 nano-technology business |
| Zdroj: | ACS Applied Materials & Interfaces. 9:16397-16403 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b01413 |
| Popis: | Donor-acceptor interfacial microstructures and fast ambipolar charge transport are pivotal in determining the device performance of inorganic-organic hybrid photovoltaics. Here, we report on a series of one-dimensional coaxial p-n junction core-shell nanohybrids formed by direct side-on attachment of carboxylated poly(3-alkylthiophene)s onto single-crystalline ZnO nanowires. The diameter of pristine ZnO nanowires is ∼30 nm, and the conjugated polymer forms a 2-10 nm shell around each nanowire. Spectroscopic studies on the resulting core-shell hybrid nanowires show an elongated conjugation length of the poly(3-alkylthiophene) backbone and fast electron transfer via ordered donor-acceptor interfaces. Hybrid nanowires in suspensions spontaneously undergo phase transitions from isotropic to nematic liquid crystalline phases via a biphasic region with increasing concentration. The unique liquid crystalline elasticity of nanohybrids results in large-area monodomain structures of aligned hybrid nanowires under simple shear flow, which are maintained in the dried film used for device fabrication. These methodologies provide a mechanism for controlling donor-acceptor interfaces and exploiting lyotropic liquid crystallinity for solution-based processing of large-area alignment of photovoltaic elements with anisotropic charge transport for hybrid photovoltaic devices. |
| Databáze: | OpenAIRE |
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