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Synthesis and characterization of fluorene derivatives as organic semiconductors for organic field-effect transistor

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posted on 2019-12-03, 17:17 authored by Kwanghee Cho, M. Rajeshkumar Reddy, Dongkyu Kim, Dongil Ho, Chaeyoung Yun, SungYong Seo, Choongik Kim

We have synthesized and characterized fluorene derivatives with alkylated thiophene as solution-processed organic semiconductors for organic field-effect transistor. HOMO/LUMO energy levels of the developed materials were tuned via different electron-acceptors. Organic field-effect transistor fabricated from dicyanovinylene-functionalized fluorine derivative with octyl thiophene as the side group exhibited n-channel characteristic with electron mobility of 0.0055 cm2/Vs and current on/off ratio ∼106. Film surface morphology and texture were correlated with the corresponding device performance.

Funding

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF- 2018R1D1A1B07045299) and by Busan Institute of Science and Technology evaluation and planning (BISTEP) grant (2019 Busan Open Lab. Program) funded by the Korea government (Ministry of Trade, Industry and Energy) and Busan metropolitan city.

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