Poly(alkoxyphenylene-thienylene) Langmuir-Schäfer thin-films for advanced performance transistors
| Autor: | Gianluca Maria Farinola, Sabrina Conoci, Livia Giotta, Pier Giorgio Zambonin, Donato Colangiuli, Ludovico Valli, Luisa Torsi, Luigia Sabbatini, Philippe Lang, F. Babudri, M. C. Tanese, Bruno Pignataro, Francesco Naso |
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| Přispěvatelé: | M C TANESE, G M FARINOLA, PIGNATARO B, L VALLI, L GIOTTA, S CONOCI, P LANG, D COLANGIULI, F BABUDRI, F NASO, L SABBATINI, P G ZAMBONIN AND L TORSI |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Langmuir
Materials science PHENYLENE General Chemical Engineering Nanotechnology law.invention law Phenylene STILLE COUPLING REACTION Materials Chemistry Thin film Conductive polymer business.industry REGIOREGULAR POLY(3-HEXYLTHIOPHENE) Transistor General Chemistry OPTICAL-PROPERTIES Solution processed BLODGETT-FILMS CONDUCTING POLYMERS Optoelectronics Field-effect transistor POLYTHIOPHENES FIELD-EFFECT TRANSISTORS REPEAT UNITS business CONJUGATED POLYMERS |
| Popis: | Solution processed Langmuir-Scha ̈fer and cast thin films of regioregular poly(2,5-dioctyloxy-1,4- phenylene-alt-2,5-thienylene) are investigated as transistor active layers. The study of their field-effect properties evidences that no transistor behavior can be seen with a cast film channel material. This was not surprising considering the twisted conformation of the polymer backbone predicted by various theoretical studies. Strikingly, the Langmuir-Scha ̈fer (LS) thin films exhibit a field-effect mobility of 5 × 10-4 cm2/V‚s, the highest attained so far with an alkoxy-substituted conjugated polymer. Extensive optical, morphological, and structural thin-film characterization supports the attribution of the effect to the longer conjugation length achieved in the Langmuir-Scha ̈fer deposited film, likely due to an improved backbone planarity. This study shows that a technologically appealing deposition procedure, such as the LS one, can be exploited to significantly improve the inherently poor field-effect properties of twisted conjugated backbones. This achievement could promote the exploitation for electronic, and possibly sensing, applications of the wealth of opportunities offered by the alkoxy substitution on the phenylene units for convenient tailoring of the phenylene-thienylene backbone with molecules of chemical and biological interest. |
| Databáze: | OpenAIRE |
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