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Properties of Flexible Phosphorescence Polymer Light Emitting Diodes Coated on Polyethylenenaphthalate Plastic Substrates

Title
Properties of Flexible Phosphorescence Polymer Light Emitting Diodes Coated on Polyethylenenaphthalate Plastic Substrates
Author
전형탁
Keywords
Flexible Polymer Light Emitting Diode; Phosphorescence; PVK; Luminance
Issue Date
2012-12
Publisher
Amer Scientific Publishers
Citation
Journal of Nanoscience and Nanotechnology, 2012, 12(2), P.1585-1588
Abstract
Flexible phosphorescence polymer light emitting diodes (PhPLEDs) with PEN/ITO/PEDOT:PSS/ PVK:Ir(ppy)(3)/TPBI/LiF/Al structure were fabricated to investigate the effects of Ir(ppy)(3) doping concentrations on the optical and electrical properties of the devices. PVK and Ir(ppy)(3) conjugated polymers as host and guest materials in the emission layer were spun coated at various concentrations of Ir(ppy)(3) ranging from 2.0 to 8.0 vol%. As the concentration of Ir(ppy)(3) increased from 2.0 to 6.0 vol% the electrical and optical properties of the flexible PhPLEDs were improved clearly. Maximum luminance and current density were obtained for a PhPLED with an Ir(ppy)(3) concentration of 6.0 vol%, with 6815 cd/m(2) and 393 mA/cm(2) at 9 V. The current efficiency tends to increase with the Ir(ppy)(3) concentration, because of the formation of the excitons required to emit light.
URI
http://www.ingentaconnect.com/content/asp/jnn/2012/00000012/00000002/art00143http://repository.hanyang.ac.kr/handle/20.500.11754/73073
ISSN
1533-4880
DOI
10.1166/jnn.2012.4582
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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