共軛高分子於有機場效電晶體的應用

Applications of Conjugated Polymers in Organic Field-effect Transistors

楊皓任(Hau-Ren Yang) ； 白峻維(Chun-Wei Pai) ； 賴育英(Yu-Ying Lai)

《化學》 77卷1期 (2019/03) Pp. 49-61

https://doi.org/10.6623/chem.201903_77(1).005

摘要

有機場效電晶體是一種數位式的固態開關，可控制汲極與源極間電流的有無，創造1或0的訊號，依照主動層的載子傳輸性質可劃分成傳輸電洞的p型電晶體及傳輸電子的n型電晶體。有機場效電晶體使用有機物的特點，具有潛力於軟性電子元件的應用。另一方面，共軛高分子的能階、溶解度及薄膜形貌可藉由化學合成或後續的處理來控制，絕佳的調控性加上可撓曲的機械性質，非常適合用於有機場效電晶體的電荷傳導層。此篇回顧文章以有機場效電晶體的工作原理及常用的高分子材料作為開端，接續至共軛高分子的電荷傳導理論，並探討化學結構、形貌與載子遷移率間的關聯性。最後，數種常用來合成共軛高分子的聚合反應及其反應機制也摘錄於此。冀望能以此篇論文作為平台，提供化學領域的研究人員了解共軛高分子於有機場效電晶體的應用及發展性。

關鍵字

共軛高分子 ； 有機場效電晶體 ； 有機半導體 ； 薄膜形貌 ； 聚合方法學

並列摘要

Organic field-effect transistor (OFET) is a digitalized device, in which ＂on＂ and ＂off＂ is regulated by the current between the source and drain electrodes. Based on the carrier, it can be divided into p-type, hole-transporting OFET and n-type, electron-transporting OFET. The charge-transporting layer in OFETs is essentially organic, rendering them potential applications in soft electronics. The energy level, solubility, and morphology of conjugated polymers can be modulated by conventional organic synthesis and post treatment. In conjunction with mechanical flexibility, conjugated polymers show promise as the charge-transporting materials for OFETs. This review article starts with the working principles for OFETs and summary for commonly-used polymer semiconductors in OFETs. The theory for charge transporting in conjugated polymers is described. Moreover, relationship among the chemical structure, thin-film morphology, and charge-carrier mobility is discussed. Lastly, several polymerization methods to access to conjugated polymers and their corresponding mechanisms are recapitulated. This review aims at giving the chemistry community an overview of applying conjugated polymers to OFETs.

並列關鍵字

Conjugated polymer ； OFET ； Organic semiconductor ； Morphology ； Polymerizationa