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Efficiency Enhancement Mechanisms in Tandem Organic Light-Emitting Devices Fabricated Utilizing a Mixed LCV: HAT-CN Layer Embedded Into a Charge Generation Layer

Title
Efficiency Enhancement Mechanisms in Tandem Organic Light-Emitting Devices Fabricated Utilizing a Mixed LCV: HAT-CN Layer Embedded Into a Charge Generation Layer
Author
김대훈
Keywords
Charge Generation Layer; Tandem Organic Light-Emitting Device; Electrical Property; Optical Property
Issue Date
2015-10
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 15, Page. 8191-8194
Abstract
Tandem organic light-emitting devices (OLEDs) with a mixed organic n-type 4,4',4 ''-methylidynetris (N,N-dimethylaniline) and organic p-type 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile layer embedded into a charge generation layer (CGL) were fabricated to enhance their current efficiency. The operating voltage of the tandem OLEDs with a mixed layer at 10 mA/cm(2) was 1 V lower than that of the tandem OLEDs without a mixed layer due to the electrons generated from the mixed layer. The matrix-assisted laser desorption-ionization-time-of-flight mass spectrometer spectra clarified the charge generation behaviors of the mixed layer into the CGL. The current efficiency of the tandem OLEDs with a mixed layer at 10 mA/cm(2) was 48.2 cd/A, which was much larger than that without a mixed layer. The increase in the current efficiency for the tandem OLEDs was attributed to the enhancement of the electron injection efficiency in a CGL resulting from the insertion of the mixed layer.
URI
http://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000010/art00142http://hdl.handle.net/20.500.11754/28501
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2015.11262
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > RESEARCH INSTITUTE OF INFORMATION DISPLAY(디스플레이공학연구소) > Articles
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