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dc.contributor.authorKeum, Changmin
dc.contributor.authorLiu, Shiyi
dc.contributor.authorAl-Shadeedi, Akram
dc.contributor.authorKaphle, Vikash
dc.contributor.authorKoen Callens, Michiel
dc.contributor.authorHan, Lu
dc.contributor.authorNeyts, Kristiaan
dc.contributor.authorZhao, Hongping
dc.contributor.authorGather, Malte Christian
dc.contributor.authorBunge, Scott D.
dc.contributor.authorTwieg, Robert J.
dc.contributor.authorJakli, Antal
dc.contributor.authorLüssem, Björn
dc.date.accessioned2018-01-23T15:30:11Z
dc.date.available2018-01-23T15:30:11Z
dc.date.issued2018-01-15
dc.identifier.citationKeum , C , Liu , S , Al-Shadeedi , A , Kaphle , V , Koen Callens , M , Han , L , Neyts , K , Zhao , H , Gather , M C , Bunge , S D , Twieg , R J , Jakli , A & Lüssem , B 2018 , ' Tuning charge carrier transport and optical birefringence in liquid-crystalline thin films : a new design space for organic light-emitting diodes ' , Scientific Reports , vol. 8 , 699 . https://doi.org/10.1038/s41598-018-19157-9en
dc.identifier.issn2045-2322
dc.identifier.otherPURE: 251797970
dc.identifier.otherPURE UUID: f0627b10-864d-4cf6-b641-a4923e1cd62a
dc.identifier.otherScopus: 85040780959
dc.identifier.otherORCID: /0000-0002-4857-5562/work/47136435
dc.identifier.otherWOS: 000422636400003
dc.identifier.urihttps://hdl.handle.net/10023/12592
dc.descriptionB.L. acknowledges financial support from the Binational Science Foundation under grant No 2014396 and from the National Science Foundation under grant No 1639073. C.K. acknowledges funding from the Kent State University Internal Post-Doctoral Competition. M.C.K. acknowledges funding from the Belgian Agentschap voor innovatie door wetenschap en techniek under grant No IWT 131498.en
dc.description.abstractLiquid-crystalline organic semiconductors exhibit unique properties that make them highly interesting for organic optoelectronic applications. Their optical and electrical anisotropies and the possibility to control the alignment of the liquid-crystalline semiconductor allow not only to optimize charge carrier transport, but to tune the optical property of organic thin-film devices as well. In this study, the molecular orientation in a liquid-crystalline semiconductor film is tuned by a novel blading process as well as by different annealing protocols. The altered alignment is verified by cross-polarized optical microscopy and spectroscopic ellipsometry. It is shown that a change in alignment of the liquid-crystalline semiconductor improves charge transport in single charge carrier devices profoundly. Comparing the current-voltage characteristics of single charge carrier devices with simulations shows an excellent agreement and from this an in-depth understanding of single charge carrier transport in two-terminal devices is obtained. Finally, p-i-n type organic light-emitting diodes (OLEDs) compatible with vacuum processing techniques used in state-of-the-art OLEDs are demonstrated employing liquid-crystalline host matrix in the emission layer.
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofScientific Reportsen
dc.rights2018 Copyright the Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTen
dc.titleTuning charge carrier transport and optical birefringence in liquid-crystalline thin films : a new design space for organic light-emitting diodesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.identifier.doihttps://doi.org/10.1038/s41598-018-19157-9
dc.description.statusPeer revieweden


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