scholarly journals The effect of side-chain branch position on the thermal properties of poly(3-alkylthiophenes)

2020 ◽  
Vol 11 (2) ◽  
pp. 517-526 ◽  
Author(s):  
Zhiqiang Cao ◽  
Luke Galuska ◽  
Zhiyuan Qian ◽  
Song Zhang ◽  
Lifeng Huang ◽  
...  

Branching closer to the backbone causes tighter packing in the side-chain direction and lower side chain and backbone dynamics.


2014 ◽  
Vol 106 (6) ◽  
pp. 1318-1326 ◽  
Author(s):  
Christina Scharnagl ◽  
Oxana Pester ◽  
Philipp Hornburg ◽  
Daniel Hornburg ◽  
Alexander Götz ◽  
...  




2012 ◽  
Vol 70 (1) ◽  
pp. 131-146 ◽  
Author(s):  
Francisco López-Carrasquero ◽  
Elizabeth Rangel-Rangel ◽  
Mayrin Cárdenas ◽  
Carlos Torres ◽  
Nahir Dugarte ◽  
...  




2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Robert C. Coffin ◽  
Christopher M. MacNeill ◽  
Eric D. Peterson ◽  
Jeremy W. Ward ◽  
Jack W. Owen ◽  
...  

Through manipulation of the solubilizing side chains, we were able to dramatically improve the molecular weight(Mw)of 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene (BDT)/2,1,3-benzothiadiazole (BT) copolymers. When dodecyl side chains (P1) are employed at the 4- and 8-positions of the BDT unit, we obtain a chloroform-soluble copolymer fraction withMwof 6.3 kg/mol. Surprisingly, by moving to the commonly employed 2-ethylhexyl branch (P2),Mwdecreases to 3.4 kg/mol. This is despite numerous reports that this side chain increases solubility andMw. By moving the ethyl branch in one position relative to the polymer backbone (1-ethylhexyl,P3),Mwis dramatically increased to 68.8 kg/mol. As a result of thisMwincrease, the shape of the absorption profile is dramatically altered, withλmax= 637 nm compared with 598 nm forP1and 579 nm forP2. The hole mobility as determined by thin film transistor (TFT) measurements is improved from~1×10−6 cm2/Vs forP1andP2to7×10−4 cm2/Vs forP3, while solar cell power conversion efficiency in increased to2.91%forP3relative to0.31%and0.19%forP1andP2, respectively.



1993 ◽  
Vol 14 (6) ◽  
pp. 1645-1654 ◽  
Author(s):  
Eiichi Akiyama ◽  
Naoyuki Koide


1994 ◽  
Vol 5 (4) ◽  
pp. 203-215 ◽  
Author(s):  
Daniel Taton ◽  
Alain Le Borgne ◽  
Nicolas Spassky ◽  
Claude Friedrich ◽  
Claudine Noël


Biochemistry ◽  
2007 ◽  
Vol 46 (42) ◽  
pp. 11695-11706 ◽  
Author(s):  
Shadi Abu-Baker ◽  
Jun-Xia Lu ◽  
Shidong Chu ◽  
Clarke C. Brinn ◽  
Christopher A. Makaroff ◽  
...  


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