Impact of Alkyl Side Chains on Thin-film Transistor Performances in Phenanthrodithiophene–Isoindigo Copolymers

2015 ◽  
Vol 44 (7) ◽  
pp. 998-1000 ◽  
Author(s):  
Shuhei Nishinaga ◽  
Hiroki Mori ◽  
Yasushi Nishihara
Keyword(s):  
Thin Film ◽  
Thin Film Transistor ◽  
Side Chains ◽  
Alkyl Side Chains

Water robustness of organic thin-film transistors based on pyrazino[2,3-g]quinoxaline-dione conjugated polymer

2020 ◽  
Vol 8 (12) ◽  
pp. 4157-4163
Author(s):  
Jieun Ko ◽  
Chee Koon Ng ◽  
Arramel ◽  
Andrew Thye Shen Wee ◽  
Teck Lip Dexter Tam ◽  
...  
Keyword(s):  
Thin Film ◽  
Conjugated Polymer ◽  
Thin Film Transistors ◽  
Thin Film Transistor ◽  
Organic Thin Film Transistors ◽  
Side Chains ◽  
Organic Thin Film ◽  
Organic Thin Film Transistor ◽  
Donor And Acceptor ◽  
Alkyl Side Chains

A π-conjugated polymer based on pyrazino[2,3-g]quinoxaline-2,7-dione (PQD) modified with long alkyl side chains to both donor and acceptor units (PQD-HD-4T-DD) was synthesized and served as a novel semiconducting layer for highly air and water stable organic thin-film transistor (OTFT).

scholarly journals Variation of the Side Chain Branch Position Leads to Vastly Improved Molecular Weight and OPV Performance in 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene/2,1,3-benzothiadiazole Copolymers

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Robert C. Coffin ◽  
Christopher M. MacNeill ◽  
Eric D. Peterson ◽  
Jeremy W. Ward ◽  
Jack W. Owen ◽  
...  
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Thin Film Transistor ◽  
Power Conversion ◽  
Hole Mobility ◽  
Side Chain ◽  
Side Chains ◽  
Absorption Profile ◽  
Polymer Backbone ◽  
Chain Branch

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.

scholarly journals Oligo(ethylene glycol)-incorporated hybrid linear alkyl side chains for n-channel polymer semiconductors and their effect on the thin-film crystalline structure

2015 ◽  
Vol 51 (8) ◽  
pp. 1524-1527 ◽  
Author(s):  
Ran Kim ◽  
Boseok Kang ◽  
Dong Hun Sin ◽  
Hyun Ho Choi ◽  
Soon-Ki Kwon ◽  
...  
Keyword(s):  
Thin Film ◽  
Ethylene Glycol ◽  
Crystalline Structure ◽  
Side Chains ◽  
Polymer Semiconductors ◽  
Naphthalene Diimide ◽  
Alkyl Side Chains

Oligo(ethylene glycol)-incorporated hybrid linear alkyl side chains, serving as solubilizing groups, are designed and introduced into naphthalene-diimide-based n-channel copolymers.

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