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Proceedings Paper

Novel semiconductors based on functionalized benzo[d,d']thieno[3,2-b;4,5-b']dithiophenes (BTDTs) and the effects of thin film growth conditions on organic field effect transistor performance
Author(s): Jangdae Youn; Ming-Chou Chen; You-jhih Liang; Hui Huang; Rocío Ponce Ortiz; Choongik Kim; Charlotte Stern; Tarng-Shiang Hu; Liang-Hsiang Chen; Jing-Yi Yan; Antonio Facchetti; Tobin J. Marks
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Paper Abstract

A series of benzo[d,d]thieno[3,2-b;4,5-b]dithiophene (BTDT) derivatives, end-functionalized with phenyl (PBTDT), benzothiophenyl (BT-BTDT) were synthesized and characterized. A facile, one-pot synthesis of BTDT was developed which enables the efficient realization of a new BTDT-based semiconductor series for organic thin-film transistors (OTFTs). The crystal structure of P-BTDT was determined via single-crystal X-ray diffraction. Various combinations of surface treatment methods, substrate temperature, and deposition flux rate sequences have significant effects on device performance. Films deposited on octadecyltrichlorosilane (OTS)- treated SiO2 substrates under properly adjusted substrate temperature and deposition flux rate achieve an efficaceous compromise between high film crystallinity and good film grain interconnectivity, resulting in good OTFT performance, with mobility greater than 0.70 cm2V-1s-1 and Ion/Ioff greater than 108.

Paper Details

Date Published: 17 August 2010
PDF: 15 pages
Proc. SPIE 7778, Organic Field-Effect Transistors IX, 777819 (17 August 2010); doi: 10.1117/12.859699
Show Author Affiliations
Jangdae Youn, Northwestern Univ. (United States)
Ming-Chou Chen, National Central Univ. (Taiwan)
You-jhih Liang, National Central Univ. (Taiwan)
Hui Huang, Northwestern Univ. (United States)
Rocío Ponce Ortiz, Northwestern Univ. (United States)
Univ. de Málaga (Spain)
Choongik Kim, Northwestern Univ. (United States)
Charlotte Stern, Northwestern Univ. (United States)
Tarng-Shiang Hu, Industrial Technology Research Institute (Taiwan)
Liang-Hsiang Chen, Industrial Technology Research Institute (Taiwan)
Jing-Yi Yan, Industrial Technology Research Institute (Taiwan)
Antonio Facchetti, Northwestern Univ. (United States)
Tobin J. Marks, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 7778:
Organic Field-Effect Transistors IX
Zhenan Bao; Iain McCulloch, Editor(s)

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