Journal
ORGANIC ELECTRONICS
Volume 11, Issue 8, Pages 1363-1375Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2010.04.029
Keywords
Organic thin-film transistor; Organic semiconductor; Solution-process; Pentacene; Anthradithiophene
Funding
- National Science Council, Taiwan, Republic of China [NSC98-2628-M-008-003, NSC97-2113-M-008-003, NSC98-2627-E-006-003]
- Industrial Technology Research Institute of Taiwan
- AFOSR [FA9550-08-1-0331]
- NSF through the Northwestern Materials Research Center [DMR-0520513]
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Four new solution-processable pentacene- (PEN) and anthradithiophene- (ADT) based organic semiconductors bearing two phenylethynyl (PE-) or triethylsilylphenylethynyl (TESPE-) substituents have been synthesized, characterized, and incorporated in thin-film transistors (TFTs). The molecular structures of these four materials have been determined by single-crystal X-ray diffraction. Thin films of all four compounds have been fabricated via drop-casting and exhibited p-channel OTFT transport with hole mobilities as high as similar to 0.01 cm(2)/V s. Compared to PEN derivatives, ADT-based compounds exhibited superior device performance and photooxidative stability in ambient. The film morphologies and microstructures of these compounds have been characterized by optical microscopy and X-ray diffraction to rationalize device performance trends. (C) 2010 Elsevier B.V. All rights reserved.
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