Affiliation:
1. Changchun University of Science and Technology
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 /m2at 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.
Publisher
Trans Tech Publications, Ltd.
Reference8 articles.
1. Kamtekar K T, Monkman A P, Bryce M R. Adv. Mater., 2010，22( 5) : 572-582.
2. Yu J S, Chen Z J, Sone M et al. Jpn. J. Appl. Phys., 2001, 40 (5): 3201-3205.
3. Yu J S, Li W Z, Jiang Y D et al. Jpn.J. Appl. Phys. , 2007, 46(2): 31-33.
4. Bhansali U S，Jia H P，Lopez M A Q，et al. Appl. Phys. Lett., 2009，94( 20) : 203501-1-3.
5. J. Kido,K. Hongawa,K. Okuyama, et al. Appl. Phys. Lett., 1994, 64(7), 815-817.