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Synthesis and characterization of highly soluble phenanthro[1,10,9,8-c,d,e,f,g]carbazole-based copolymer: Effects of thermal treatment on crystalline order and charge carrier mobility

Title
Synthesis and characterization of highly soluble phenanthro[1,10,9,8-c,d,e,f,g]carbazole-based copolymer: Effects of thermal treatment on crystalline order and charge carrier mobility
Authors
Jeong, Nam YeongJang, Min SuPark, So MinChung, Dae SungKim, Yun HiKwon, Soon Ki
DGIST Authors
Chung, Dae Sung
Issue Date
2018-02
Citation
Dyes and Pigments, 149, 560-565
Type
Article
Article Type
Article
Keywords
AnnealingAtomic force microscopyCharge transferCrystalline materialsField effect transistorsHeat treatmentOrganic field effect transistorsPolycyclic aromatic hydrocarbonsPolymer filmsPolymersSemiconducting filmsSemiconducting organic compoundsSolubilityThin film circuitsThin film transistorsTransistorsX ray diffractionCrystalline structureHigh solubilityPhenanthrocarbazolePolycrystalline structureSynthesis and characterizationsThermal treatment temperatureTransfer characteristicsX-ray diffraction measurementsThin filmsCharge CarriersCopolymersHeat TreatmentSolventsSynthesis
ISSN
0143-7208
Abstract
In this study, a novel donor-acceptor type semiconducting polymer was designed and synthesized based on phenanthro[1,10,9,8-c,d,e,f,g]carbazole backbone. The resulting polymer, poly[4-(5-(6-(2-decyltetradecyl)-6H-phenanthro[1,10,9,8-c,d,e,f,g]carbazol-4-yl)thiophen-2-yl)-5,6-bis(octyloxy)-7-(thiophen-2-yl)benzo[c][1,2,5]thiadiazole] (PPTBTT), exhibited high solubility in various solvents which enables facile fabrication of semiconducting devices such as thin-film transistors, and also opens up possibilities for large scale solution processing. Absorption spectra of PPTBTT showed large bathochromic shift when the polymer was prepared as a thin-film, which can be explained by the high solubility and molecular packing of the synthesized polymer. X-ray diffraction measurements showed that the crystalline structure of PPTBTT polymer film is largely influenced by the thermal treatment temperature. Together with the atomic force microscopy data, it was found that the optimal thermal treatment temperature of PPTBTT film is 170 °C. The charge transfer characteristics were confirmed by fabricating PPTBTT thin-film transistor. In accordance with the polycrystalline structure, PPTBTT film transistor showed the highest mobility of 0.0092 cm2 V−1 s−1 and on/off ratio of 104 when the device was annealed at 170 °C. © 2017
URI
http://hdl.handle.net/20.500.11750/5593
DOI
10.1016/j.dyepig.2017.10.044
Publisher
Elsevier Ltd
Related Researcher
Files:
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Collection:
ETC1. Journal Articles


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