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- W2351693513 abstract "Regular of voltage on electroluminescent(EL)spectrum of blue organic light-emitting devices were discussed.The device structure included indium tin oxide(ITO)glass substrate/40 nm 4,4′,4″- tris[N,-(3-methylphenyl)-N-phenylamino]tripheny-lamine(m-MTDATA)as buffer layer/5 nm N, N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4-diamine(NPB)as hole transparent layer/x nm 4,4-bis(2,2-diphenyl vinyl)-1,1-biphenyl(DPVBi)as emitting layer/y nm 6,11,12,-tetraphenyl- naphthacene(Rubrene)as emitting layer/40 nm tris(8-hydroxyquinoline)aluminum(Alq)as electron transport layer/0.5 nm LiF/100 nm aluminum(Al). Organic layers were deposited by high-vacuum(4×10~(-4)Pa)thermal evaporation onto a cleaned glass substrate precoated with transparent,conductive indium-tin-oxide(ITO).The layer thickness of the deposited material was monitored in situ using an oscillating quartz thickness monitor.Finally, a LiF buffer layer and Al cathode were vapor-deposited at a background pressure of 4×10~(-4)Pa onto the organic films.EL spectra and Commission Internationale De L Eclairage(CIE)coordination of these devices were measured by a PR650 spectra scan spectrometer.The luminance-current density- voltage characteristics were recorded simultaneously with the measurement of the EL spectra by com- bining the spectrometer with a Keithley model 2400 programmable voltage-current source.All mea- surements were carried out at room temperature under ambient conditions. The experiment results show that Full Width at Half Maximum(FWHM)of the EL spectrum of blue organic light-emitting devices becomes narrow and peak wavelength has blue-shift with the voltage increasing,FWHM from 140 nm to 70 nm,the EL spectrum from 456 nm to 444 nm,at voltage from 2 V to 12 V.Electrons was seized by Rubrene then getting enough energy,probability is increased that the excitons was formed and compounded through the Rubrene layer into DPVBi layer. The results of peak wavelength blue-shift is that exciton recombination zone shifted through the DPVBi layer into the NPB layer with the voltage increasing.Pure color of the device was effected by the change of peak wavelength." @default.
- W2351693513 created "2016-06-24" @default.
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- W2351693513 date "2007-01-01" @default.
- W2351693513 modified "2023-09-24" @default.
- W2351693513 title "Effect of Voltage on Electroluminescent Spectrum of Blue Organic Light-emitting Devices" @default.
- W2351693513 hasPublicationYear "2007" @default.
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