Solvent boiling point affects the crystalline properties and performances of anthradithiophene-based devices

Title
Solvent boiling point affects the crystalline properties and performances of anthradithiophene-based devices
Author(s)
안태규[안태규]박승정[박승정]안은주[안은주]장상훈[장상훈]김예별[김예별]김경훈[김경훈]차효정[차효정]김유진[김유진]김세현김윤희[김윤희]박찬언[박찬언]
Keywords
THIN-FILM TRANSISTORS; FIELD-EFFECT TRANSISTORS; ORGANIC TRANSISTORS; SMALL MOLECULES; POLYMER; MOBILITY; PENTACENE; SEMICONDUCTORS; DIELECTRICS; MORPHOLOGY
Issue Date
201503
Publisher
ELSEVIER SCI LTD
Citation
DYES AND PIGMENTS, v.114, pp.60 - 68
Abstract
We investigated the effects of the solvent boiling point on organic field-effect transistor (OFET) device performances in devices prepared using two newly synthesized anthradithiophene derivatives: 9,10-di(4'-pentylphenylethynyl)-anthra[2,3-b:6,7-b']dithiophene (DPPEADT) and 9,10-bi([9',9'-dimethyl-fluoren-2-ylethynyl])-anthra[2,3-b:6,7-b']dithiophene (DFEADT). DPPEADT exhibited a distinct crystalline morphology whereas DFEADT was amorphous. We characterized the relationship between the molecular structures, film morphologies, and OFET device performances in devices prepared using solvents having one of three different boiling points (chlorobenzene, 1,2-dichlorobenzene, and 1,2,4-trichlorobenzene). 1,2,4-Trichlorobenzene, which provided the highest boiling point among the solvents tested and acted as a good solvent for DPPEADT, significantly improved the field-effect mobilities of DPPEADT devices up to 0.16 cm(2)/V by enhancing the crystallinity of the film. OFETs based on amorphous DFEADT films prepared using the three solvents did not provide enhanced electrical performances. The differences between the transistor performances were attributed to the degree of pi-overlap, the molecular structures, and the morphological properties of the films. (C) 2014 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/33038http://dx.doi.org/10.1016/j.dyepig.2014.10.027
ISSN
0143-7208
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공과대학 > 화학공학부 > Articles
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