Theoretical study of the effect of ethynyl group on the structure and electrical properties of phenyl-thiadiazole systems as precursors of electron-conducting materials

2009 ◽  
Vol 130 (23) ◽  
pp. 234907 ◽  
Author(s):  
José M. Granadino-Roldán ◽  
Andrés Garzón ◽  
Gregorio García ◽  
Tomás Peña-Ruiz ◽  
M. Paz Fernández-Liencres ◽  
...  
1983 ◽  
Vol 103 (4) ◽  
pp. 507-522 ◽  
Author(s):  
Mitsuo Kawato ◽  
Nakaakira Tsukahara

2020 ◽  
Vol 40 (8) ◽  
pp. 3049-3056 ◽  
Author(s):  
Yongcheng Lu ◽  
Yuanxun Li ◽  
Daming Chen ◽  
Rui Peng ◽  
Qinghui Yang ◽  
...  

1993 ◽  
Vol 59 (1-3) ◽  
pp. 54-58
Author(s):  
R.J. Seeböck ◽  
W.E. Köhler ◽  
M. Römheld ◽  
U. Zellhuber

1997 ◽  
Vol 482 ◽  
Author(s):  
J. Eisner ◽  
M. Haugk ◽  
R. Gutierrez ◽  
Th. Frauenheim

AbstractWe present a theoretical study of atomic structures, electrical properties and formation energies for a variety of possible reconstructions with 1×1 and 2×2 periodicity of the GaN(0001) and (0001) surfaces. We find that during MBE growth in the (0001) direction 2×2 structures become stable under N rich growth conditions while Ga rich environment should yield structures with 1×1 periodicity. Considering MBE growth on (0001) surfaces, among the investigated structures only those with 1×1 periodicity are predicted to be stable. During MOCVD growth, where H terminated surfaces may occur, only structures with lx1 periodicity are found to be stable for both growth directions.


2020 ◽  
Vol 535 ◽  
pp. 110778
Author(s):  
F.N.N. Pansini ◽  
M. de Campos ◽  
A.C. Neto ◽  
C.S. Sergio

2007 ◽  
Author(s):  
Zhigang Zhu ◽  
Arunabhiram Chutia ◽  
Riadh Sahnoun ◽  
Hideyuki Tsuboi ◽  
Michihisa Koyama ◽  
...  

2012 ◽  
Author(s):  
A. Coens ◽  
M. Chakaroun ◽  
A. P. Fischer ◽  
M. W. Lee ◽  
A. Boudrioua ◽  
...  

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 658
Author(s):  
Daniela Valeria Tomasino ◽  
Mario Wolf ◽  
Hermes Farina ◽  
Gianluca Chiarello ◽  
Armin Feldhoff ◽  
...  

Poly(3,4-ethylenedioxythiophene) (PEDOT) plays a key role in the field of electrically conducting materials, despite its poor solubility and processability. Various molecules and polymers carrying sulfonic groups can be used to enhance PEDOT’s electrical conductivity. Among all, sulfonated polyarylether sulfone (SPAES), prepared via homogenous synthesis with controlled degree of sulfonation (DS), is a very promising PEDOT doping agent. In this work, PEDOT was synthesized via high-concentration solvent-based emulsion polymerization using 1% w/w of SPAES with different DS as dopant. It was found that the PEDOT:SPAESs obtained have improved solubility in the chosen reaction solvents, i.e., N, N-dimethylformamide, dimethylacetamide, dimethyl sulfoxide, and N-methyl-2-pyrrolidone and, for the first time, the role of doping agent, DS and polymerization solvents were investigated analyzing the electrical properties of SPAESs and PEDOT:SPAES samples and studying the different morphology of PEDOT-based thin films. High DS of SPAES, i.e., 2.4 meq R-SO3−× g−1 of polymer, proved crucial in enhancing PEDOT’s electrical conductivity. Furthermore, the DMSO capability to favor PEDOT and SPAES chains rearrangement and interaction results in the formation of a polymer film with more homogenous morphology and higher conductivity than the ones prepared from DMAc, DMF, and NMP.


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