TY - JOUR
T1 - New TIPS-substituted benzo[1,2-b:4,5-b′]dithiophene-based copolymers for application in polymer solar cells
AU - Bathula, Chinna
AU - Song, Chang Eun
AU - Badgujar, Sachin
AU - Hong, Seong Jin
AU - Kang, In Nam
AU - Moon, Sang Jin
AU - Lee, Jaemin
AU - Cho, Shinuk
AU - Shim, Hong Ku
AU - Lee, Sang Kyu
PY - 2012/11/7
Y1 - 2012/11/7
N2 - Novel triisopropylsilylethynyl (TIPS)-substituted benzodithiophene-based copolymers, poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′] dithiophene-2,6-diyl-alt-4,6-(2-ethylhexyl-thieno[3,4-b]thiophene-2-carboxylate) ] (P1), poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′] dithiophene-2,6-diyl-alt-[4,6-{(1-thieno[3,4-b]thiophen-2-yl) -2-ethylhexan-1-one}] (P2), and poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2- b:4,5-b′]dithiophene-2,6-diyl-alt-4,6-(2-ethylhexyl(3-fluorothieno[3,4-b] thiophene)-2-carboxylate)] (P3), were designed and synthesized for use in polymer solar cells (PSCs). We describe the effects of the different acceptor segment side groups on the optical, electrochemical, field-effect hole mobility, and photovoltaic characteristics of the resulting TIPS-based copolymers. The side groups in the copolymers were found to significantly influence the carrier mobilities and photovoltaic properties of the copolymers. The field-effect mobilities of the holes varied from 9 × 10 -5 cm 2 V -1 s -1 in P2 to 3 × 10 -3 cm 2 V -1 s -1 in P1. Under optimized conditions, the TIPS-based polymers showed power conversion efficiencies (PCEs) for the PSCs in the range of 3.16-5.76%. Among the TIPS-based copolymers studied here, P1 showed the best photovoltaic performance, with an open-circuit voltage (V oc) of 0.82 V, a short-circuit current density (J sc) of 12.75 mA cm -2, a fill factor (FF) of 0.55, and a power-conversion efficiency of 5.76% using a P1:PC 71BM blend film as the active layer under AM 1.5G irradiation (100 mW cm -2).
AB - Novel triisopropylsilylethynyl (TIPS)-substituted benzodithiophene-based copolymers, poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′] dithiophene-2,6-diyl-alt-4,6-(2-ethylhexyl-thieno[3,4-b]thiophene-2-carboxylate) ] (P1), poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′] dithiophene-2,6-diyl-alt-[4,6-{(1-thieno[3,4-b]thiophen-2-yl) -2-ethylhexan-1-one}] (P2), and poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2- b:4,5-b′]dithiophene-2,6-diyl-alt-4,6-(2-ethylhexyl(3-fluorothieno[3,4-b] thiophene)-2-carboxylate)] (P3), were designed and synthesized for use in polymer solar cells (PSCs). We describe the effects of the different acceptor segment side groups on the optical, electrochemical, field-effect hole mobility, and photovoltaic characteristics of the resulting TIPS-based copolymers. The side groups in the copolymers were found to significantly influence the carrier mobilities and photovoltaic properties of the copolymers. The field-effect mobilities of the holes varied from 9 × 10 -5 cm 2 V -1 s -1 in P2 to 3 × 10 -3 cm 2 V -1 s -1 in P1. Under optimized conditions, the TIPS-based polymers showed power conversion efficiencies (PCEs) for the PSCs in the range of 3.16-5.76%. Among the TIPS-based copolymers studied here, P1 showed the best photovoltaic performance, with an open-circuit voltage (V oc) of 0.82 V, a short-circuit current density (J sc) of 12.75 mA cm -2, a fill factor (FF) of 0.55, and a power-conversion efficiency of 5.76% using a P1:PC 71BM blend film as the active layer under AM 1.5G irradiation (100 mW cm -2).
UR - https://www.scopus.com/pages/publications/84867288541
U2 - 10.1039/c2jm33466f
DO - 10.1039/c2jm33466f
M3 - Article
AN - SCOPUS:84867288541
SN - 0959-9428
VL - 22
SP - 22224
EP - 22232
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 41
ER -
