期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 4, 页码 1504-1510出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm14549e
关键词
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资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0002494]
- Korean Government (MEST) [2010-0019408, 2010-0026916, 2009-0093818, 2011-0009148]
- National Research Foundation of Korea [2010-0019408, 2011-0009148, 2010-0026916, 2010-0002494] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A fact-finding study on thiophenyl diketopyrrolopyrrole (TDPP)-containing polymers for electronically convertible transport characteristics in organic field effect transistors (OFETs) is presented. In the subject of this consideration, a TDPP-based polymer with bis-benzothiadiazole (BisBT) units that serve as powerful electron-deficient building blocks, namely PDTDPP-BisBT, is prepared in order to achieve an n-channel transistor. The resulting polymer shows n-channel dominant ambipolar OFET characteristics and its electron mobility (1.3 x 10(-3) cm(2) V-1 s(-1)) is found to be one order of magnitude higher than the hole mobility. Besides, the PDTDPP-BisBT OFET performance is independent of film-deposition conditions due to its completely amorphous microstructure, supported by the atomic force microscopy (AFM) and X-ray diffraction (XRD) analyses. Herein, we report an intriguing discovery in sync with our previous studies that TDPP-based polymers can function as a p-type, n-type, or ambipolar organic semiconductor in accordance with the degree of electron affinity of the comonomers.
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