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Electroluminescent devices with function of electro-optic shutter

Title
Electroluminescent devices with function of electro-optic shutter
Authors
Song, SeongkyuJeong, JaewookChung, Seok HwanJeong, Soon MoonChoi, Byeongdae
DGIST Authors
Song, Seongkyu; Jeong, Jaewook; Chung, Seok Hwan; Jeong, Soon Moon; Choi, Byeongdae
Issue Date
2012-09
Citation
Optics Express, 20(19), 21704-21712
Type
Article
Article Type
Article
Keywords
Dielectric LayerDisplay DevicesEL DevicesElectro-LuminescentElectro-Optic PropertiesElectro-Optical DevicesElectroluminescenceExcitation FrequencyExtraction EfficienciesLightLuminescent DevicesMulti-FunctionsOptoelectronic DevicesPhosphor LayersPolymer Dispersed Liquid Crystals (PDLC)Transparent DisplaysTransparent ElectrodeZinc Sulfide
ISSN
1094-4087
Abstract
The polymer-dispersed liquid crystal (PDLC) was used as a dielectric layer of electroluminescent (EL) device to provide multi-function of electroluminescence and electro-optic shutter. A 50 μm-thick PDLC layer was formed between a transparent electrode and a ZnS:Cu phosphor layer. The electro-optic properties of the EL device were not distorted by the introduction of the PDLC layer. The extraction efficiency of luminescence was improved by more than 14% by PDLC layer. The transmittance of the PDLC was also founded not to be degraded significantly by excitation frequency. Therefore, the electroluminescence of the device was ignited by excitation frequency at a given voltage for full transparency of the PDLC. This device has great potential for applications in transparent displays with the function of a privacy window. © 2012 Optical Society of America.
URI
http://hdl.handle.net/20.500.11750/3335
DOI
10.1364/OE.20.021704
Publisher
Optical Society of American (OSA)
Related Researcher
Files:
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Collection:
Magnet-Controlled Materials Research Group1. Journal Articles
Smart Textile Convergence Research Group1. Journal Articles
Intelligent Devices and Systems Research Group1. Journal Articles


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