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

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

doi:10.1117/12.859699

17 August 2010 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

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

Author Affiliations +

Proceedings Volume 7778, Organic Field-Effect Transistors IX; 777819 (2010) https://doi.org/10.1117/12.859699
Event: SPIE Photonic Devices + Applications, 2010, San Diego, California, United States

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 I_on/I_off greater than 10⁸.

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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, and Tobin J. Marks "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", Proc. SPIE 7778, Organic Field-Effect Transistors IX, 777819 (17 August 2010); https://doi.org/10.1117/12.859699

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