화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.13, 1297-1303, December, 2020
DOI10.1007/s13233-020-8167-0  Export Citation
Effect of Fluorine Atom on Photovoltaic Properties of Triphenylamine-Substituted Quinoxaline-Based D-A Type Polymers
Seok Woo Lee, Mijin Jeong1, Dong Ryeol Whang2, Joo Hyun Kim1, †, and Dong Wook Chang†
  • Department of Industrial Chemistry, Pukyong National University, Busan 48513, Korea
  • 1Department of Polymer Engineering, Pukyong National University, Busan 48513, Korea
  • 2Department of Advanced Materials, Hannam University, Daejeon 34054, Korea
E-mail:,
A series of two-dimensional triphenylamine (TPA)-substituted quinoxaline- based D-A-type polymers, in which the electron-donating indacenodithiophene unit was linked to the TPA-substituted electron-accepting quinoxaline derivatives, were synthesized. Fluorine, which exhibits a strong electron-withdrawing nature, was systematically incorporated into the structure of the polymers and its effect on the properties of the polymers was investigated. Three target polymers, namely, PIQx-T0F, PIQx-T1F, and PIQx-T2F were synthesized. The Arabic numerals in the names of the polymers indicate the number of fluorine atoms at the 6,7-positions of the triphenylamine-substituted quinoxaline units in the polymers. The structural, optical, and electrochemical characteristics of the polymers were investigated. The PCE of the polymer solar cells with the inverted-type configuration based on the mono-fluorinated polymer, PIQx-T1F, was the highest (5.30%) followed by those of the devices based on PIQx-T0F (4.49%) and the di-fluorinated polymer, PIQx-T2F (4.65%). This enhanced photovoltaic performance of the device with the polymer with a single fluorine atom can be attributed to the increase in the hole mobility, charge generation and dissociation, molecular ordering, and suppression of unfavorable recombination kinetics. Therefore, the incorporation of a single fluorine atom is the optimal condition for the synthesis of TPA-substituted quinoxaline-based polymers for photovoltaic applications.
Keywords:triphenylamine;quinoxaline;indacenodithiophene;fluorine atom
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