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Multi-donor random terpolymers based on benzodithiophene and dithienosilole segments with different monomer compositions for high-performance polymer solar cells

Title
Multi-donor random terpolymers based on benzodithiophene and dithienosilole segments with different monomer compositions for high-performance polymer solar cells
Authors
Heo, Hyo JungKim, Hong GiNam, Geon IkLee, Dong HwaLee, Youn Gu
DGIST Authors
Lee, Youn Gu
Issue Date
ACCEPT
Citation
Macromolecular Research, 1-8
Type
Article
Article Type
Article in Press
Keywords
Organic polymersPhotovoltaic effectsPolymer solar cellsSolar cellsBenzodithiopheneCompositional effectsDithienosiloleHigh performance Polymer solar cellsMonomer compositionsPhotovoltaic performancePhysicochemical propertythienopyrrolodioneTerpolymers
ISSN
1598-5032
Abstract
We synthesized and characterized a series of new random terpolymers which are composed of two electron-rich segments, thienyl-substituted benzo[1,2-b:4,5-b’]dithiophene (BDT) and dithieno[3,2-b:2’,3’-d]silole (DTS), and one electron- deficient segment, thieno[3,4-c]pyrrole-4,6-dione (TPD), with different ratio of DTS segment to BDT segment (25%, 50%, and 75% DTS). The compositional effect of the random terpolymers on physicochemical properties and photovoltaic performances were studied. The different compositions of BDT and DTS segments in the conjugated backbone of the terpolymers had a crucial effect on the electrochemical properties of the random terpolymers. PTPD-BDT75-DTS25 (P1) with monomeric composition of BDT and DTS (75:25) segments showed excellent light harvesting ability, high charge carrier mobility, and low-lying HOMO energy level. Moreover, the photovoltaic performance of the random terpolymer based BHJ PSCs was strongly influenced by the composition of BDT and DTS segments in the conjugated backbones of the terpolymers. The inverted BHJ PSCs based on the PTPD-BDT75- DTS25 exhibited a Voc of 0.94 V, a Jsc of 10.83 mA/cm2, and a FF of 56.52%, leading to a high PCE of 5.78%.[Figure not available: see fulltext.] © 2017 The Polymer Society of Korea and Springer Science+Business Media B.V., part of Springer Nature
URI
http://hdl.handle.net/20.500.11750/5582
DOI
10.1007/s13233-018-6030-3
Publisher
Polymer Society of Korea
Related Researcher
  • Author Lee, Youn Gu Organic & Printed Electronics Laboratory(OPEL)
  • Research Interests OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지; OLED; Printed Electronics
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Collection:
Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles


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