You are not logged in Total: 7journals, 20,600articles Online
AccountAccount
Login / Register
Forgot Login?
 
Main menuMain menu
What's new
Journal list
Visiting ranking
Phrase ranking
Polls
About us
 
SearchSearch
 
Journal Site
Advanced Search
 

Home  >  Journal list  >  Polymer Journal  >  Vol.47  No.7 (2015)  >  pp.513-521

Polymer Journal
<<Previous article Vol.47  No.7 (2015)   pp.513 - 521 Next article>>

Synthesis of 1,3,4-thiadiazole-based donor–acceptor alternating copolymers for polymer solar cells with high open-circuit voltage

Seijiro Fukuta1,2, Zhongqiang Wang3, Satoshi Miyane1,2, Tomoyuki Koganezawa4, Takeshi Sano5, Junji Kido3, Hideharu Mori1,3, Mitsuru Ueda6 and Tomoya Higashihara1,2,7
1Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Japan
2Innovative Flex Course for Frontier Organic Material Systems, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Japan
3Department of Organic Device Engineering, Graduate School of Science and Engineering, and Research Center for Organic Electronics (ROEL), Yamagata University, Yonezawa, Yamagata, Japan
4Japan Synchrotron Radiation Research Institute, Sayo-gun, Hyogo, Japan
5Innovation Center for Organic Electronics (INOEL), Yamagata University, Yonezawa, Yamagata, Japan
6Department of Chemistry, Kanagawa University, Yokohama-shi, Kanagawa, Japan
7Japan Science and Technology Agency (JST), PRESTO, Kawaguchi, Saitama, Japan

We report the synthesis and characterization of novel 1,3,4-thiadiazole (TDz)-containing π-conjugated alternating copolymers with donor units, such as thiophene (PTDzTh), selenophene (PTDzSe), thieno[3,4-b]thiophene (PTDzTT), 3,3′-didodecyl-2,2′-bithiophene (PTDzBTh) and (E)-1,2-di-(3-dodecylthiophene)vinylene (PTDzTV). The TDz-containing polymers show deep highest occupied molecular orbital (HOMO) energy levels at approximately −5.50 to −5.20eV due to the electron deficiency of the TDz unit. In addition, PTDzTV shows a relatively extended absorption wavelength (λonset=629nm). The microstructures of the film state are primarily influenced by the interdigitation of the side chains, and PTDzTT with a rigid backbone forms a densely packed crystalline structure, as evidenced by grazing incident wide-angle X-ray scattering experiments. Polymer solar cells using the TDz polymers showed high open-circuit voltages up to 0.965V based on the deep HOMO energy levels, and PTDzTV showed the highest power conversion efficiency of 0.529% among the polymers.


Received: January 18, 2015 , Revised: February 19, 2015
Accepted: February 22, 2015 , Published online: April 22, 2015
© 2015 The Society of Polymer Science, Japan

NatureAbstract (Nature)


SPARC Japan

Terms of Use | Privacy Policy