Effects of Doping Concentration on the Performance of Blue Fluorescent OLEDs

Gang Zhang; Xi Yan Zhang

doi:10.4028/www.scientific.net/AMM.778.96

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 778Effects of Doping Concentration on the Performance...

Effects of Doping Concentration on the Performance of Blue Fluorescent OLEDs

Abstract:

The OLEDs were fabricated with the structure of ITO/m-MTDATA(20nm)/NPB(10nm)/ DPVBi:BCzVBi(15 nm,x%)/TPBi(10 nm)/Alq3(20nm)/Cs₂CO₃：Ag₂O(2nm,20%)/ Al (100 nm) by using the method of fluorescent dyes dopant. The effect of different DPVBi:BCzVBi doping concentration(x=5,8, 10 and 15) on the properties of blue light device was studied．Results show that when the mass fraction of fluorescent dye BCzVBi was 10%, performances of the device were the best. This device had a maximum current efficiency of 4.19 cd /A and maximum luminance of 14757 cd /m² at 17 V.When the driving voltage changed from 8 to 17 V, the efficiency of the devices had been rising. There are not the phenomenon of efficient roll-off.

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Periodical:

Applied Mechanics and Materials (Volume 778)

Pages:

96-99

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.778.96

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Online since:

July 2015

Authors:

Gang Zhang, Xi Yan Zhang*

Keywords:

Dopant, Efficiency, Luminance, Performance

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