The Role of Morphology in Optically Switchable Transistors Based on a Photochromic Molecule/p‐Type Polymer Semiconductor Blend
| Autor: | Ester Buchaca-Domingo, Karl Börjesson, Vincenzo Palermo, Alberto Salleo, Paolo Samorì, Natalie Stingelin, Duc T. Duong, Martin Herder, Marco Carroli, Andrea Liscio, Stefan Hecht, Emanuele Orgiu |
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| Přispěvatelé: | Institut de Science et d'ingénierie supramoléculaires (ISIS), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Photoisomerization 02 engineering and technology Conjugated system 010402 general chemistry 01 natural sciences Biomaterials Crystallinity Photochromism photoresponsive electronics photochromic molecules Electrochemistry Molecule Thin film organic field-effect transistors chemistry.chemical_classification Polymer [CHIM.MATE]Chemical Sciences/Material chemistry poly(3-hexylthiophene) 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 0104 chemical sciences Electronic Optical and Magnetic Materials diarylethenes chemistry Chemical engineering 0210 nano-technology |
| Zdroj: | Advanced Functional Materials Advanced Functional Materials, Wiley, 2019, pp.1907507. ⟨10.1002/adfm.201907507⟩ Advanced functional materials 30 (2019). doi:10.1002/adfm.201907507 info:cnr-pdr/source/autori:Carroli, Marco; Duong, Duc T.; Buchaca-Domingo, Ester; Liscio, Andrea; Borjesson, Karl; Herder, Martin; Palermo, Vincenzo; Hecht, Stefan; Stingelin, Natalie; Salleo, Alberto; Orgiu, Emanuele; Samori, Paolo/titolo:The Role of Morphology in Optically Switchable Transistors Based on a Photochromic Molecule%2Fp-Type Polymer Semiconductor Blend/doi:10.1002%2Fadfm.201907507/rivista:Advanced functional materials (Print)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:30 |
| ISSN: | 1616-301X 1616-3028 |
| Popis: | International audience; The correlation between morphology and optoelectronic performance in organic thin‐film transistors based on blends of photochromic diarylethenes (DAE) and poly(3‐hexylthiophene) (P3HT) is investigated by varying molecular weight (Mw = 20–100 kDa) and regioregularity of the conjugated polymer as well as the temperature of thermal annealing (rt‐160 °C) in thin films. Semicrystalline architectures of P3HT/DAE blends comprise crystalline domains, ensuring efficient charge transport, and less aggregated regions, where DAEs are located as a result of their spontaneous expulsion from the crystalline domains during the self‐assembly. The best compromise between field‐effect mobility (µ) and switching capabilities is observed in blends containing P3HT with Mw = 50 kDa, exhibiting µ as high as 1 × 10−3 cm2 V−1 s−1 combined with a >50% photoswitching ratio. Higher or lower Mw than 50 kDa are found to be detrimental for field‐effect mobility and to lead to reduced device current switchability. The microstructure of the regioregular P3HT blend is found to be sensitive to the thermal annealing temperature, with an increase in µ and a decrease in current modulation being observed as a response to the light‐stimulus likely due to an increased P3HT‐DAE segregation, partially hindering DAE photoisomerization. The findings demonstrate the paramount importance of fine tuning the structure and morphology of bicomponent films for leveraging the multifunctional nature of optoelectronic devices. |
| Databáze: | OpenAIRE |
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