可溶性醌型具硫醚鏈噻吩及多併環噻吩衍生物有機薄膜電晶體材料之開發;Development of Solution Processable Thioalkylated Fused Thiophenes Derivatives for Organic Thin Film Transistors

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/74007

Title:	可溶性醌型具硫醚鏈噻吩及多併環噻吩衍生物有機薄膜電晶體材料之開發;Development of Solution Processable Thioalkylated Fused Thiophenes Derivatives for Organic Thin Film Transistors
Authors:	張晗;Han, Zhang
Contributors:	化學學系
Keywords:	有機薄膜電晶體;多併環噻吩;醌型;可溶性具硫醚鏈
Date:	2017-08-10
Issue Date:	2017-10-27 12:58:58 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究以具硫醚碳鏈之聯噻吩為核心，並於其兩端引入二氰基亞甲基(dicyanomethylene)以及具有二氰基與烷基鏈的rhodanine基團，開發可溶性醌型有機薄膜電晶體材料DSTTQ與RHO-DSTT系列。在此之外，對實驗室開發的可溶性併環噻吩材料進行改良，並引入四併環TTA結構，開發出新的核心DSTTTA系列以及其衍生物。在 n - type 材料開發方面，藉由噻吩硫醚鏈上之硫原子與中心噻吩硫原子之S‥S分子間作用力，開發出DSTT核心，於其兩側引入氰基，改變整體分子共振型態，開發出具長碳鏈之醌型材DSTTQ (1)，同時開發不具 S‥S 分子間作用力之DTTQ (2) 作為比較。Dicyano rhodanine為具有良好溶解度的拉電子基團，將其引入DSTT核心,開發出新的OTFT材料RHO-DSTT (3) 與b8RHO-DSTT (4)。在 p-type 材料開發方面，以四併環噻吩TTA為核心，在其兩端引入具硫醚長碳鏈的噻吩基團增加共軛並改善其溶解度，合成出多併環核心DSTTTA (5)。並將二併噻吩與苯基結構引入核心，開發出DTT-DSTTTA (6) 與 DP-DSTTTA (7) 材料。利用 UV-vis 和 DPV 探討所開發分子的 HOMO 與 LUMO 能階，藉由 TGA 和 DSC 探討這些新開發材料之熱穩定性。目前，化合物已經由溶液製程製成元件初步測試，具有 n-type 場效性質，載子移動率可達 0.04 cm2/Vs。具有 p-type 場效性質，載子移動率可達 0.02 cm2/Vs。其餘半導體材料之元件仍在待測中。 ;A series of new materials based on thioalkyl bithiopene core have been developed for organic thin film transistors (OTFTs). For comparing six rings p-type OTFTs material DDTT-BST developed which has a highest mobility in our past work, a new six-ring-core DSTTTA (5) were developed as well as its derivatives DP-DSTTTA (6) and DTT-DSTTTA (7). To improve the solubility, thioalkylated thiophenes were capped with a thiophene to give the DSTT core. Then a series quinoidal compounds were developed which are DSTTQ(1) and DRTTQ(2). The LUMO energy level of these three quinoidal compounds were measured by DPV and exhibited air stable properties Dicyanoalkylrhodanine is a strong electron-withdrawing group with good solubility and recently be used as a terminal unit of organic materials. Based on the DSTT core, two dicyanoalkylrhodanine capped OTFT materials were designed which are RHO-DSTT (3) and b8RHO-DSTT (4). Both of them show good solubility and thermal stability. The optical and electrochemical (HOMO and LUMO) properties of these materials were characterized by UV-vis and DPV. Thermal properties were investigated by TGA. The OTFTs studies of these compounds are in progress.
Appears in Collections:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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