Application of Novel Polyimide/ inorganic Nanoparticles Hybrid Materials on Organic Devices

• Main Authors: Su-Nu Liu, 劉素女
• Other Authors: Yang-Yen Yu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/47187931286428813590

碩士 === 明志科技大學 === 材料工程系碩士班 === 102 === In this study, we use the different method to prepare the organic thin film transistor,including preparing polyimide/TiO2 hybird thin film and improving the suspension properties of TiO2 by attrition mill. At the first part,FTIR spectra shows the polyimide can be prepare successfully and cross-linking TiO2 network formed at 440–850 cm-1. The XRD patterns prove that the crystal phase of titania is anatase and the grain size is mearsured by Scherrer's equation with 13 nm. The second part, improving the suspension properties of TiO2 nanoparticle by attrition mill and preparing polyimide/TiO2 hybird thin film. We compare the electrical properties of method 1 (non-attrition mill process)and method 2(attrition mill proceass).The dielectric constant mearsured at 1MHz with 4.27 to 4.74.The result of AFM spectra, the rough is decreased from 10.59nm to 1.71nm by blending 15 wt% RMS;and after attrition mill,the result of OTFT shows the TiO2 blending content can increase from 8 wt% to 13 wt%. The devices best property Ion-Ioff raises from 5.0 ×104 to 4.7 ×105,and Vth drops to -2.06 V. The result shows that using attrition mill coordinate with dispersant effectively dispeares the TiO2 particle, enhancing blending ratio, and possessing OTFT property well. The third part, using perovskite which replces pentacene be a semiconductor layer. The result from Energy gap calculation shows the perovskite energy gap is 1.5 eV ; utilizing evaporation prepares semiconductor can aviod eroding dielectric layer from spin coating.