A green neutral state donor-acceptor copolymer for organic solar cells

Serap Günes*, Derya Baran, Gorkem Günbas, Asuman Durmus, Anita Fuchsbauer, Niyazi Serdar Sariciftci, Levent Toppare

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We report on the photophysical and photovoltaic properties of a low band gap polymer bearing a quinoxaline moiety, poly(2,3-bis(3,4-bis(decyloxy)phenyl)- 5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)quinoxaline) PDOPEQ, as an electron donor in bulk heterojunction solar cells blended with the acceptor 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene (PCBM). Devices were composed of PDOPEQ and varying amounts of PCBM (1:1, 1:2, 1:3, 1:4 w-w ratio). The components were spun cast from chlorobenzene (CB) and characterized by measuring current-voltage characteristics under simulated AM 1.5 conditions. The devices with 1:3 polymer to PCBM ratio exhibited short circuit current density (Jsc) of 0.8 mA cm-2, an open circuit voltage (Voc) of 0.2 V, and a fill factor (FF) of 0.3. Incident photon to current efficiency (IPCE) is also reported. The IPCE spectrum spans from 400 nm to 800 nm and exhibits a photocurrent contribution of ca. 5.5% at around 400 nm. The nanoscale morphology was investigated with atomic force microscopy (AFM). Photoinduced absorption spectroscopy confirms the photoinduced charge transfer in such donor acceptor blends.

Original languageEnglish (US)
Pages (from-to)1245-1251
Number of pages7
JournalPolymer Chemistry
Volume1
Issue number8
DOIs
StatePublished - Oct 2010
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Biochemistry
  • Biomedical Engineering
  • Polymers and Plastics
  • Organic Chemistry

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