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Synthesis and Photovoltaic Properties of Copolymers with Fluorinated Quinoxaline and Fluorene Moiety

Fluorine이 도입된 Quinoxaline과 Fluorene 골격을 가진 고분자의 합성 및 특성분석

  • Song, Suhee (Department of Physics, Pukyong National University) ;
  • Choi, Hyo Il (Department of Industrial Chemistry, Pukyong National University) ;
  • Shin, In Soo (Department of Physics, Pukyong National University) ;
  • Park, Seong Soo (Department of Industrial Chemistry, Pukyong National University) ;
  • Lee, Gun Dae (Department of Industrial Chemistry, Pukyong National University) ;
  • Park, Sung Heum (Department of Physics, Pukyong National University) ;
  • Jin, Youngeup (Department of Industrial Chemistry, Pukyong National University)
  • Received : 2016.05.31
  • Accepted : 2016.08.22
  • Published : 2016.10.10

Abstract

New electron deficient moiety, 6,7-difluoro-2,3-dihexylquinoxaline, was developed for the push-pull type copolymer for organic photovoltaics (OPVs). The PFDTQxF with lower HOMO energy level was synthesized using fluorene and 6,7-difluoro- 2,3-dihexylquinoxaline by Suzuki polymerization. The PFDTQxF thin film shows two absorption peaks at 368 and 493 nm. The HOMO and LUMO energy levels of PFDTQxF are calculated -5.55 and -3.91 eV, respectively. The device comprising PFDTQxF showed a $V_{OC}$ value of 0.47 V, a $J_{SC}$ value of $4.48mA/cm^2$, and a FF of 0.32, which yielded PCE of 0.78%, under the illumination of AM 1.5.

Acknowledgement

Supported by : Pukyong National University

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