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Author

Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab (ATOMS)
Research Interests
  • Optoelectronic materials synthesis/organic electronics, functionalization of carbonaceous solids, advanced materials chemistry, macromolecular chemistry

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Semi-transparent low-donor content organic solar cells employing cyclopentadithiophene-based conjugated molecules

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Title
Semi-transparent low-donor content organic solar cells employing cyclopentadithiophene-based conjugated molecules
Author
Lee, JunghoHernandez, Jeff L.Pelse, IanReynolds, John R.Yang, Changduk
Issue Date
201810
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY C, v.6, no.39, pp.10532 - 10537
Abstract
Considering the facile synthesis of the cyclopentadithiophene (CPDT) budding block, this study aims to synthesize and characterize two donor-acceptor type conjugated molecules, 2EH-CPDT(FBTTh2)(2) and 5EN-CPDT(FBTTh2)(2), with different branching points from the backbone. It was found that the branching point variation strategy slightly tunes the optical and electrochemical properties of the resulting conjugated molecule films owing to the difference between their intermolecular packing. When used as a donor material in PC71BM-based organic solar cells (OSCs), the power conversion efficiency of 2EH-CPDT(FBTTh2)(2) is twice that of the ones processed using 5EN-CPDT(FBTTh2)(2) . Interestingly, with no post treatments, OSCs were optimized with especially low-donor content within the active Layer (donor : acceptor weight ratio = 1:9), which allows construction of a highly transparent film with a visible transmittance over 50%, showing potential for application in integrated photovoltaics.
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DOI
http://dx.doi.org/10.1039/c8tc02863j
ISSN
2050-7526
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