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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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Cubic-Like Bimolecular Crystal Evolution and over 12% Efficiency in Halogen-Free Ternary Solar Cells

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dc.contributor.authorKumari, Tanyako
dc.contributor.authorLee, Sang Myeonko
dc.contributor.authorYang, Changdukko
dc.date.available2018-05-24T00:41:09Z-
dc.date.created2018-05-21ko
dc.date.issued201805ko
dc.identifier.citationADVANCED FUNCTIONAL MATERIALS, v.28, no.19, pp.1707278 -ko
dc.identifier.issn1616-301Xko
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/24138-
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201707278ko
dc.description.abstractIn this study, the solubility properties of a given ternary blend set, with two donors (poly(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl (PTB7-Th) and benzo[1,2-b;4,5-b′]dithiophene-based small molecule (DR3TSBDT)) and one acceptor ([6,6]-phenyl-C71-butyric acid methyl ester (PC71BM)), in a series of solvents are determined, and active material–solvent interactions are used as an aid for finding suitable nonchlorinated solvents to achieve effective ternary organic solar cells (OSCs) based on PTB7-Th:DR3TSBDT:PC71BM. An exceptional power conversion efficiency (PCE) as high as 12.3% (certified 11.94%) is obtained using the developed nonhalogenated processing system. In-depth investigations (morphology, charge mobility, recombination dynamics, and OSC characteristics) uncover the underlying structure–property relationships as a function of the chosen nonhalogenated systems. Another intriguing finding of this study is the formation of a cubic bimolecular crystal structure of PTB7-Th:PC71BM in a nonhalogenated system, which is the first such demonstration in blend films. This sheds light upon the fact that the physical properties of a material applied from different solutions may surpass the variation in the properties between two material having totally different molecular structure. Therefore, this work not only offers important scientific insights into developing highly efficient and eco-friendly OSCs but also improves our understanding of achievable bimolecular crystals with an intercalated structure.ko
dc.languageENGko
dc.publisherWILEY-V C H VERLAG GMBHko
dc.subjectbimolecular cubic crystalko
dc.subjectmaterial&#8211ko
dc.subjectsolvent interactionko
dc.subjectnonhalogenated solvent solubility parametersko
dc.subjectternary solar cellko
dc.titleCubic-Like Bimolecular Crystal Evolution and over 12% Efficiency in Halogen-Free Ternary Solar Cellsko
dc.typeARTICLEko
dc.identifier.pid1050null
dc.identifier.rimsid30325ko
dc.identifier.scopusid2-s2.0-85044330564ko
dc.identifier.wosid000431615300010ko
dc.type.rimsAko
dc.identifier.doihttp://dx.doi.org/10.1002/adfm.201707278ko
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