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ISSN : 1225-0112(Print)
ISSN : 2288-4505(Online)
Applied Chemistry for Engineering Vol.27 No.5 pp.467-471
DOI :

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

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 VOC value of 0.47 V, a JSC value of 4.48 mA/cm2, and a FF of 0.32, which yielded PCE of 0.78%, under the illumination of AM 1.5.

Fluorine이 도입된 Quinoxaline과 Fluorene 골격을 가진 고분자의 합성 및 특성분석

초록

새로운 전자 받개인 6,7-difluoro-2,3-dihexylquinoxaline을 이용하여 유기 태양 전지형 고분자를 개발하였다. Fluorene과6,7-difluoro-2,3-dihexylquinoxaline으로 Suzuki polymerization방법을 이용하여 낮은 HOMO 에너지를 가지는 PFDTQxF 고분자를 합성하였다. 필름상태의 PFDTQxF은 368과 493 nm에서 두 개의 흡광도를 보였다. PFDTQxF의 HOMO와LUMO 에너지는 각각 -5.55와 -3.91 eV을 나타내었다. PFDTQxF의 태양전지 소자는 0.47 V의 VOC와 4.48 mA/cm2의JSC와 0.32의 FF를 가지고 있어 0.78%의 에너지 효율을 나타내었다.

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