| Autor: |
Jeng Rong Ho, Shin Chi Yeh, Mon Chi Wong, Raymond Chien-Chao Tsiang, Li Ko Chiu, Yen Heng Chen |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Journal of Nanoscience and Nanotechnology. 12:2292-2299 |
| ISSN: |
1533-4880 |
| DOI: |
10.1166/jnn.2012.5720 |
| Popis: |
The charge transport enhancement of using poly(3-hexylthiophene) covalently bonded with gold nanoparticles as an active layer in a bottom-gate/top contact, Au/(P3HT)/(bilayer dielectric)/Si OTFT device has been studied. P3HT was synthesized via the modified Grignard metathesis method and functionalized to have a thiol terminal (P3HT(SH)). Gold nanoparticles (AuNPs) with sizes ranging from 2 to 10 nm were then formed via a reduction of HAuCl4 in the presence of P3HT(SH). Compared to the pristine P3HT, the AuNPs-containing P3HT composite materials have a higher energy level of HOMO and a smaller electrochemical bandgap E(g)chem. The smaller bandgap enhances the charge carrier mobility and the higher HOMO energy level indicates a reduced barrier and an increased injection rate for charge carrier at the source contact. Furthermore, the threshold voltage V(T) of AuNPs-containing P3HT samples remain nearly unchanged and their saturation current I(D) and the field-effect mobility are higher. An OTFT device fabricated with a composite sample containing 1.30% AuNPs has a carrier mobility and saturation current nearly two time higher than pristine P3HT. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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