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A novel random terpolymer for high-efficiency bulk-heterojunction polymer solar cells

Title
A novel random terpolymer for high-efficiency bulk-heterojunction polymer solar cells
Authors
Bang, SM[Bang, Su-Mi]Kang, S[Kang, Sungkyoung]Lee, YS[Lee, You-Sun]Lim, B[Lim, Bogyu]Heo, H[Heo, Hyojung]Lee, J[Lee, Jaechol]Lee, Y[Lee, Youngu]Na, SI[Na, Seok-In]
DGIST Authors
Heo, H[Heo, Hyojung]; Lee, Y[Lee, Youngu]
Issue Date
2017
Citation
RSC Advances, 7(4), 1975-1980
Type
Article
Article Type
Article
Keywords
BenzodithiopheneBulk-HeterojunctionBulk-Heterojunction (Bhj)Donor MaterialsEfficiencyEnergy GapHeterojunctionsHigh-EfficiencyHighest Occupied Molecular OrbitalMolecular OrbitalsOrganic Photovoltaic (OPV)Polymer Solar Cells (PSCs)PolymersPower Conversion EfficienciesSolar Cells
ISSN
2046-2069
Abstract
A new random terpolymer, coded LGC-D013, based on N-alkylthieno[3,4-c]pyrrole-4,6-dione (TPD) as the acceptor and benzodithiophene (BDT) and terthiophene as the donor units, has been synthesized and characterized as a donor material in bulk-heterojunction (BHJ) organic photovoltaic (OPV) applications. The thermal, optical, and electrochemical properties of the LGC-D013 were characterized. The polymer has a deep highest occupied molecular orbital (HOMO) level of −5.56 eV and an optical band gap of 1.84 eV in film. The OPV based on LGC-D013:PC71BM blend film demonstrated a power conversion efficiency (PCE) of 6.09%, with a relatively high fill factor (FF) of 72.55%. After 1,8-diiodooctane (DIO) treatment with a 3% volume ratio, the short circuit current density (Jsc) was improved from 9.48 to 11.29 mA cm−2, and FF was improved from 72.55 to 73.13%, resulting in PCE improvement from 6.09 to 7.22%. The BHJ OPV using LGC-D013 as the donor polymer based on TPD and BDT with terthiophene showed an improved fill factor as high as 72%, which is higher than those of conventional TPD-BDT based polymers. © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/2102
DOI
10.1039/c6ra27518d
Publisher
Royal Society of Chemistry
Files:
There are no files associated with this item.
Collection:
Energy Systems EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles


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