Abstract
Two isomeric diphenyl-dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b] thiophene (DPh-DNTTs), 2,9- and 3,10-DPh-DNTT, were characterized by means of single-crystal X-ray analysis, thin film XRDs, and evaluation of organic field-effect transistors (OFETs) using their evaporated thin films. The packing structures both in the single crystal and thin film state were classified into a typical herringbone packing regardless of the substitution positions, similar to the parent DNTT. The OFETs showed typical p-channel transistor characteristics with mobilities of as high as 3.5 cm2 V-1 s-1 for both isomers, which is slightly higher than that of the parent DNTT. Compared to related DNTT-based organic semiconductors, a unique point of DPh-DNTTs was found to be superior thermal stability in OFET devices. In particular, the 2,9-DPh-DNTT-based OFETs preserved its superior FET characteristics up to 250 C. For its excellent thermal stability with good FET characteristics, 2,9-DPh-DNTT can be a useful organic semiconductor in various applications that require processes at high temperatures.
Original language | English |
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Pages (from-to) | 2331-2336 |
Number of pages | 6 |
Journal | ACS Applied Materials and Interfaces |
Volume | 5 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2013 Apr 10 |
Externally published | Yes |
Keywords
- crystal structures
- high mobility
- organic field-effect transistors
- structure-property relationship
- thermal stability
- thienoacene-based organic semiconductors
ASJC Scopus subject areas
- Materials Science(all)