π-Conjugated main chain polymers containing bis(bithiophenyl dithienothiophene)-based repeating group and their application to polymer solar cells

Kyung Hwan Kim, Dae Sung Chung, Chan Eon Park, Dong Hoon Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

New dithienothiophene (DTT)-containing conjugated polymers, such as poly(2,6-bis(2-thiophenyl-3-dodecylthiophene-2-yl)dithieno[3,2-b;2',3'-d] thiophene, 1 and poly(2,6-bis(2-thiophenyl-4-dodecylthiophene-2-yl)dithieno[3,2- b;2',3'-d]thiophene, 2 have been successfully synthesized via Stille coupling reactions using dodecyl-substituted thiophene-based monomer, bistributyltin dithienothiophene, and bistributyltin bithiophene. The main difference between two polymers is the substitution position of dodecyl side chains in a repeating group. The semiconducting properties of the two polymers have been evaluated in organic photovoltaics (OPVs). Two conjugated polymers are also well mixed with methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) for fabricating bulk heterojunction PV devices. As a result, the polymer solar cell devices made of polymers 1 and 2 had the best preliminary results with an open-circuit voltage of 0.43-0.44V, a short-circuit current density of 5.95-5.96mA/cm2, and a fill factor of 0.34, offering an overall power conversion efficiency (PCE) of 0.9%.

Original languageEnglish
Pages (from-to)187-192
Number of pages6
JournalMolecular Crystals and Liquid Crystals
Volume538
DOIs
Publication statusPublished - 2011 Jun 1

Fingerprint

Thiophenes
Thiophene
Polymers
solar cells
Conjugated polymers
polymers
thiophenes
Butyric acid
Open circuit voltage
Short circuit currents
Conversion efficiency
Heterojunctions
Esters
Substitution reactions
Current density
Monomers
heterojunction devices
butyric acid
short circuit currents
open circuit voltage

Keywords

  • Absorption
  • conjugated polymers
  • dithienothiophene
  • mobility
  • organic photovoltaics
  • semiconductor

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

π-Conjugated main chain polymers containing bis(bithiophenyl dithienothiophene)-based repeating group and their application to polymer solar cells. / Kim, Kyung Hwan; Chung, Dae Sung; Park, Chan Eon; Choi, Dong Hoon.

In: Molecular Crystals and Liquid Crystals, Vol. 538, 01.06.2011, p. 187-192.

Research output: Contribution to journalArticle

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