Hybrid Thin-Film Transistors Based on Nanocomposite Silicon Nanowire and Polythiophene Networks
| Autor: | Cheng, Kuang-Yao, 鄭光耀 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Semiconducting organic materials have their great potential in applications ranging from, solar cells, LED, RFID tags, and E-papers. It can realize large area fabrication on flexible substrate at low cost. Conjugated semiconducting polymers with high carrier mobility and solution process ability characteristics (e.g., regioregular polythiophene) have been introduced into the fabrication process of organic thin film transistors (OTFTs). Since the OTFTs performance strongly depends on the structural arrangement and ordered orientation of π-conjugated planes perpendicular to the substrate surface of the polymer thin film. Self-organized regioregular poly-3-hexylthiophene (rr-P3HT) has above favorable properties which seem to be very helpful in carrier transport and also has remarkable solution process ability. Despite recent advancements in material functionality and processing technologies, OTFTs are somewhat limited in terms of device lifetime and mobility, which hinder their adoption on a wider scale. This work demonstrated a series of hybrid thin film transistors (TFTs) with a network of organic semiconductors and parallel aligned nanowires. Silicon nanowire arrays, assembled by a recently developed stretched contact printing technique, are embedded in a layer of a spun-coat semiconducting polymer, forming a nanocomposite active channel for electrical conduction. The hybrid TFTs have revealed an enhancement in charge carrier mobility (up to four times) and air stability compared to those of the pristine polymer host. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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