TY - JOUR
T1 - Synthesis of a low bandgap polymer based on a thiadiazolo-indolo[3,2-b] carbazole derivative for enhancement of open circuit voltage of polymer solar cells
AU - Park, Ha Jin
AU - Lee, Yoonkyoo
AU - Jo, Jea Woong
AU - Jo, Won Ho
PY - 2012/10
Y1 - 2012/10
N2 - For the purpose of synthesizing an electron donor polymer with a low-lying highest occupied molecular orbital (HOMO) energy level and thus to achieve high open circuit voltage (VOC) of polymer solar cells, an indolocarbazole derivative, 3,8-bis-(4-octyl-thiophene-2-yl)-5,6-didodecyl-thiadiazolo- indolo[3,2-b]carbazole, was synthesized and used as a building block of a low bandgap alternating copolymer. An alternating copolymer, poly(3,8-bis-(4-octyl- thiophene-2-yl)-5,6-didodecyl-thiadiazolo-indolo[3,2-b]carbazole-alt-2,1, 3-benzothiadiazole) (PTICThBT), was synthesized via the Suzuki coupling reaction, and the copolymer exhibited a deep HOMO level of -5.4 eV. When a blend of PTICThBT and PC71BM was used as an active layer in bulk heterojunction polymer solar cells, a high VOC of 0.84 V was obtained with a power conversion efficiency of 2.62% under AM 1.5G condition.
AB - For the purpose of synthesizing an electron donor polymer with a low-lying highest occupied molecular orbital (HOMO) energy level and thus to achieve high open circuit voltage (VOC) of polymer solar cells, an indolocarbazole derivative, 3,8-bis-(4-octyl-thiophene-2-yl)-5,6-didodecyl-thiadiazolo- indolo[3,2-b]carbazole, was synthesized and used as a building block of a low bandgap alternating copolymer. An alternating copolymer, poly(3,8-bis-(4-octyl- thiophene-2-yl)-5,6-didodecyl-thiadiazolo-indolo[3,2-b]carbazole-alt-2,1, 3-benzothiadiazole) (PTICThBT), was synthesized via the Suzuki coupling reaction, and the copolymer exhibited a deep HOMO level of -5.4 eV. When a blend of PTICThBT and PC71BM was used as an active layer in bulk heterojunction polymer solar cells, a high VOC of 0.84 V was obtained with a power conversion efficiency of 2.62% under AM 1.5G condition.
UR - http://www.scopus.com/inward/record.url?scp=84865774867&partnerID=8YFLogxK
U2 - 10.1039/c2py20417g
DO - 10.1039/c2py20417g
M3 - Article
AN - SCOPUS:84865774867
SN - 1759-9954
VL - 3
SP - 2928
EP - 2932
JO - Polymer Chemistry
JF - Polymer Chemistry
IS - 10
ER -