TY - JOUR
T1 - Novel fluoride-substituted donor/acceptor polymers containing benzodithiophene and quinoxaline units for use in low–band gap solar cells
AU - Singh, Ashutosh
AU - Singh, Ravinder
AU - Lin, Chein Min
AU - Pola, Murali Krishna
AU - Chang, Chiao Kai
AU - Wei, Kung-Hwa
AU - Lin, Hong-Cheu
PY - 2016/9/1
Y1 - 2016/9/1
N2 - In this study we used Stille polycondensation to synthesize a series of low–band gap fluoride-substituted conjugated polymers containing electron-donating benzodithiophene (BDT) and electron-accepting quinoxaline (Qx) units, with the latter presenting either two or four fluoride atoms. These donor/acceptor polymers exhibited a broad absorption range (from 300 to 750 nm), with band gap energies of less than 1.20 eV (measured using cyclic voltammetry). Because of their strongly electron-donating thiophene units, the donor/acceptor polymers featuring the more highly fluorinated structures possessed the lowest band gaps (as low as 1.14 eV) and, thus, induced the greatest photovoltaic performance among these tested polymers. The highest power conversion efficiency (2.13%) was obtained from the polymer solar cell featuring an active layer of the polymer PTF2 blended with PC70BM (1:1.5, w/w), with a short-circuit current density, open circuit voltage, and fill factor of 8.7 mA cm−2, 0.72 V, and 0.34, respectively.
AB - In this study we used Stille polycondensation to synthesize a series of low–band gap fluoride-substituted conjugated polymers containing electron-donating benzodithiophene (BDT) and electron-accepting quinoxaline (Qx) units, with the latter presenting either two or four fluoride atoms. These donor/acceptor polymers exhibited a broad absorption range (from 300 to 750 nm), with band gap energies of less than 1.20 eV (measured using cyclic voltammetry). Because of their strongly electron-donating thiophene units, the donor/acceptor polymers featuring the more highly fluorinated structures possessed the lowest band gaps (as low as 1.14 eV) and, thus, induced the greatest photovoltaic performance among these tested polymers. The highest power conversion efficiency (2.13%) was obtained from the polymer solar cell featuring an active layer of the polymer PTF2 blended with PC70BM (1:1.5, w/w), with a short-circuit current density, open circuit voltage, and fill factor of 8.7 mA cm−2, 0.72 V, and 0.34, respectively.
KW - Benzodithiophene
KW - Donor/acceptor polymer
KW - Fluoride-substituted polymer
KW - Low-band gap polymer
KW - Quinoxaline
KW - Stille polycondensation
UR - http://www.scopus.com/inward/record.url?scp=84962520754&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2016.03.025
DO - 10.1016/j.eurpolymj.2016.03.025
M3 - Article
AN - SCOPUS:84962520754
VL - 82
SP - 1
EP - 2
JO - European Polymer Journal
JF - European Polymer Journal
SN - 0014-3057
ER -