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Donor acceptor polymers with a regioregularly incorporated thieno [3,4-b]thiophene segment as a pi-bridge for organic photovoltaic devices

Title
Donor acceptor polymers with a regioregularly incorporated thieno [3,4-b]thiophene segment as a pi-bridge for organic photovoltaic devices
Authors
Kim, H[Kim, Honggi]Lee, H[Lee, Hyungjin]Jeong, Y[Jeong, Youngjun]Park, JU[Park, Ju-Un]Seo, D[Seo, Donghyun]Heo, H[Heo, Hyojung]Lee, D[Lee, Donghwa]Ahn, Y[Ahn, Yumi]Lee, Y[Lee, Youngu]
DGIST Authors
Kim, H[Kim, Honggi]; Lee, H[Lee, Hyungjin]; Jeong, Y[Jeong, Youngjun]; Park, JU[Park, Ju-Un]; Seo, D[Seo, Donghyun]; Heo, H[Heo, Hyojung]; Lee, D[Lee, Donghwa]; Ahn, Y[Ahn, Yumi]; Lee, Y[Lee, Youngu]
Issue Date
2016-01
Citation
Synthetic Metals, 211, 75-83
Type
Article
Article Type
Article
Keywords
Conjugated PolymersCyclic VoltammetryDonor-Acceptor PolymerDonor-Acceptor PolymersEnergy GapHeterojunctionsLow BandgapNanotechnologyOrganic Photovoltaic DevicesOrganic PolymersPhotovoltaic ApplicationsPower Conversion EfficienciesStructural ModificationsThermogravimetric AnalysisThieno[3,4-B]ThiopheneThiopheneUltraviolet Visible SpectroscopyVoltammetry Measurements
ISSN
0379-6779
Abstract
A series of donor-acceptor (D-A) polymers with regioregularly incorporated a thieno[3,4-b]thiophene as a π-bridge between electron donor and electron acceptor segments were successfully synthesized for the first time. The optical, thermal, and electrochemical properties of the D-A polymers with the thieno[3,4-b]thiophene as a π-bridge were characterized by UV/vis spectroscopy, thermogravimetric analysis, and cyclic voltammetry measurements. They exhibited low energy bandgap because of extended π-conjugation length and increased electron density through conjugated polymer backbones. Moreover, they showed suitable HOMO and LUMO energy levels for photovoltaic applications. The bulk heterojunction organic photovoltaic devices based on the D-A polymers with the regioregularly incorporated thieno[3,4-b]thiophene segment exhibited about 10% higher power conversion efficiency (PCE) than the D-A polymer with thienyl segment as a π-bridge due to enhanced light harvesting ability and excellent nanoscale network. This study implies that the D-A polymers with the regioregularly incorporated thieno[3,4-b]thiophene segment as a π-bridge can achieve high PCE through structural modification of the polymers. © 2015 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/2748
DOI
10.1016/j.synthmet.2015.11.016
Publisher
Elsevier
Related Researcher
  • Author Lee, Youn Gu Organic & Printed Electronics Laboratory(OPEL)
  • Research Interests OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지; OLED; Printed Electronics
Files:
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Collection:
Energy Science and EngineeringETC1. Journal Articles
Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles
ETC1. Journal Articles


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