TY - JOUR
T1 - Dioctylfluorene-thiophene based conjugated copolymers for bulk heterojunction solar cells and enhanced power conversion efficiency via methanol treatment
AU - Chuang, Hung Yi
AU - Hsu, Steve Lien Chung
AU - Chen, Li Chiun
AU - Sun, Yang
AU - Lin, Pi Yun
PY - 2015/12
Y1 - 2015/12
N2 - We have synthesized two dioctylfluorene-thiophene based conjugated copolymers, PFTDPP and PFTpBT. After methanol treatment, the power conversion efficiencies (PCEs) could reach 4.25 % and 4.20 %, respectively. Sensible design and synthesis of conjugating polymers is important to the development of polymer solar cells (PSCs). In this work, we synthesized and characterized two dioctylfluorene-thiophene based conjugated copolymers, PFTDPP and PFTpBT, having different acceptor groups on the backbone. The photovoltaic properties of the copolymers blended with 6,6-phenyl-C61-butyric acid methyl ester (PC61BM) as an electron acceptor were obtained. The PSC based on a conventional device configuration ITO/PEDOT:PSS/ Polymer:PC61BM/LiF/Al showed power conversion efficiencies (PCEs) of 2.42% and 3.02% for PFTDPP and PFTpBT, respectively. Methanol treatment was introduced to further optimize device performance, and the solvent treatment gave a dramatic increase in PCE. The best PCEs could reach 4.25% and 4.20% after methanol treatment under AM 1.5G illumination with an intensity of 100 mW cm-2 from a solar simulator.
AB - We have synthesized two dioctylfluorene-thiophene based conjugated copolymers, PFTDPP and PFTpBT. After methanol treatment, the power conversion efficiencies (PCEs) could reach 4.25 % and 4.20 %, respectively. Sensible design and synthesis of conjugating polymers is important to the development of polymer solar cells (PSCs). In this work, we synthesized and characterized two dioctylfluorene-thiophene based conjugated copolymers, PFTDPP and PFTpBT, having different acceptor groups on the backbone. The photovoltaic properties of the copolymers blended with 6,6-phenyl-C61-butyric acid methyl ester (PC61BM) as an electron acceptor were obtained. The PSC based on a conventional device configuration ITO/PEDOT:PSS/ Polymer:PC61BM/LiF/Al showed power conversion efficiencies (PCEs) of 2.42% and 3.02% for PFTDPP and PFTpBT, respectively. Methanol treatment was introduced to further optimize device performance, and the solvent treatment gave a dramatic increase in PCE. The best PCEs could reach 4.25% and 4.20% after methanol treatment under AM 1.5G illumination with an intensity of 100 mW cm-2 from a solar simulator.
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U2 - 10.1002/pi.4979
DO - 10.1002/pi.4979
M3 - Article
AN - SCOPUS:84945435003
VL - 64
SP - 1779
EP - 1785
JO - British Polymer Journal
JF - British Polymer Journal
SN - 0959-8103
IS - 12
ER -
