| Light extraction from surface plasmons and waveguide modes in an organic light-emitting layer by nanoimprinted gratings. | |
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MedLine Citation:
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PMID: 21263715 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Organic light-emitting diodes (OLEDs) usually exhibit a low light outcoupling efficiency because a large fraction of power is lost to surface plasmons (SPs) and waveguide modes. In this paper it is demonstrated that periodic grating structures with almost µm-scale can be used to extract SPs as well as waveguide modes and therefore enhance the outcoupling efficiency in light-emitting thin film structures. The gratings are fabricated by nanoimprint lithography using a commercially available diffraction grating as a mold which is pressed into a polymer resist. The outcoupling of SPs and waveguide modes is detected in fluorescent organic films adjacent to a thin metal layer in angular dependent photoluminescence measurements. Scattering up to 5th-order is observed and the extracted modes are identified by comparison to the SP and waveguide dispersion obtained from optical simulations. In order to demonstrate the low-cost, high quality and large area applicability of grating structures in optoelectronic devices, we also present SP extraction using a grating structure fabricated by a common DVD stamp. |
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Authors:
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Jörg Frischeisen; Quan Niu; Alaa Abdellah; Jörg B Kinzel; Robert Gehlhaar; Giuseppe Scarpa; Chihaya Adachi; Paolo Lugli; Wolfgang Brütting |
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Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: Optics express Volume: 19 ISSN: 1094-4087 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-1-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: - |
Other Details:
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Languages: ENG Pagination: A7-A19 Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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