Study on Low-Voltage OTFT by Using Copolymer as The Dielectric Layer

• Main Authors: Hui-Chen Huang, 黃惠真
• Other Authors: Zingway Pei
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/40125489441846152124

碩士 === 國立中興大學 === 光電工程研究所 === 97 === In this work, a random copolymer, PS-r-PMMA, is used as dielectric layer for a pentacene OTFT. The PS-r-PMMA dielectric can be uniformly coated on the surface with hydroxyl groups in a very simple spin coating process. After thermal annealing, a layer of end-functionalized PS-r-PMMA will graft to the OH- group forming polymer brushes. Then dipped samples are in toluene in order to remove the residue PS-r-PMMA, forming a flat and thin film of a few nanometers. We can take advantage of annealing process and rinsing by toluene for thickness control. By means of annealing and rinsing process, PS-r-PMMA has the potential to use in large-are and low-cost fabrication, such as inkjet printing, slot coating, doctor blade. The pentacene-based OTFTs with annealing temperature at 190°C, 150°C were successfully demonstrated, exhibiting operation voltage as low as 5V and S.S is smaller than 0.3 V/dec.