| Original Articles |
|
|
|
|
High Efficiency Red Organic Light-Emitting Diodes Based on Microcavity Structure |
| ZHANG Hong-Mei1;YOU Han2;SHI Jia-Wei1;GUO Shu-Xu1;WANG Wei1;LIU Ming-Da1;MA Dong-Ge2 |
| 1National Key Laboratory of Integrated Optoelectronics, Jilin University, Changchun 130012
2State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
3Graduate School of the Chinese Academy of Sciences, Beijing 100049 |
|
| Cite this article: |
|
ZHANG Hong-Mei, YOU Han, SHI Jia-Wei et al 2006 Chin. Phys. Lett. 23 1335-1338 |
|
|
|
|
Abstract We demonstrate high efficiency red organic light-emitting diodes (OLEDs) based on a planar microcavity comprised of a dielectric mirror and a metal mirror. The microcavity devices emitted red light at a peak wavelength of 610nm with a full width at half maximum (FWHM) of 25nm in the forward direction, and an enhancement of about 1.3 factor in electroluminescent (EL) efficiency has been experimentally achieved with respect to the conventional noncavity devices. For microcavity devices with the structure of distributed Bragg reflectors (DBR)/indium-tin-oxide(ITO)/V2O5/N,N'-di(naphthalene-1-yl)-N,% N'-diphenyl benzidine(NPB)/4-(dicy-anome-\linebreak thylene)-2-t-butyl-6(1,1,7,7-tetrame-thyljulolidyl-9-enyl)-4H-pyran(DCJTB):% tris(8-hydroxyquinoline) aluminium\linebreak (Alq3)/Alq3/LiF/Al, the maximum brightness arrived at 37000cd/m2 at a current density of 460.0mA/cm2, and the current efficiency and power efficiency reach 13.7cd/A at a current density of 0.23mA/cm2 and 13.3lm/W at a current density of 0.04mA/cm2, respectively.
|
| Keywords:
85.60.Jb
42.15.Eq
85.60.Pg
42.79.Bh
|
|
|
Published: 01 May 2006
|
|
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
