TITLE

Phosphorescent top-emitting organic light-emitting devices with improved light outcoupling

AUTHOR(S)
Riel, H.; Karg, S.; Beierlein, T.; Ruhstaller, B.; Rieß, W.
PUB. DATE
January 2003
SOURCE
Applied Physics Letters;1/20/2003, Vol. 82 Issue 3, p466
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A dielectric capping layer has been used to increase the light output and to tune the spectral characteristics of top-emitting, phosphorescent organic light-emitting devices (OLEDs). By controlling the thickness of the dielectric layer deposited on top of a thin metal cathode, the transmittance of the top electrode can be adjusted. Maximum light output is not achieved at highest cathode transmittance, indicating that the interplay between different interference effects can be controlled by means of the capping-layer thickness. Furthermore, we demonstrate that the electrical device characteristic is not influenced by the capping layer. The strength of our concept in particular lies in the fact that the optical and the electrical device performance can be optimized separately. Using the capping-layer concept, we have achieved an OLED efficiency of 64 cd/A with pure green emission.
ACCESSION #
8926041

 

Related Articles

  • Vibronic-Spin�Orbit Coupling in Octachlorodibenzo-p-dioxin. Gastilovich, E. A.; Klimenko, V. G.; Korol�kova, N. V.; Serov, S. A. // Optics & Spectroscopy;Nov2002, Vol. 93 Issue 5, p682 

    The dipole moments of vibronic transitions P[SUB0R] caused by vibronic-spin-orbit coupling along the coordinates of out-of-plane vibration modes R (to which the most intense vibronic lines of the fine-structure phosphorescence spectrum correspond) were calculated for the [SUP3]B[SUB1u](pp*) ?...

  • The T1(nÏ€*)←S0 laser induced phosphorescence excitation spectrum of acetaldehyde in a supersonic free jet: Torsion and wagging potentials in the lowest triplet state. Liu, H.; Lim, E. C.; Muñoz-Caro, C.; Niño, A.; Judge, R. H.; Moule, D. C. // Journal of Chemical Physics;8/15/1996, Vol. 105 Issue 7, p2547 

    The laser induced T[SUB1](nπ*)←S[SUB0] phosphorescence excitation spectrum of jet-cooled acetaldehyde has been observed for the first time with a rotating slit nozzle excitation system. The vibronic origins were fitted to a set of levels that were obtained from a Hamiltonian that...

  • The phosphorescence excitation spectrum of biacetyl: An analysis of the acetyl and methyl.... Moule, D.C.; Sharp, A.C. // Journal of Chemical Physics;2/1/1998, Vol. 108 Issue 5, p1874 

    Examines the phosphorescence excitation spectrum of biacetyl. Analysis of acetyl and methyl torsional structure; Use of a rotating slit nozzle excitation apparatus to record the excitation spectrum of biacetyl; Simulation of band progressions in the low frequency region of the spectrum.

  • Quantum-chemical study of the vibronic structure of the phosphorescence and T[sub 1]...T[sub n]... Zgierski, Marek Z. // Journal of Chemical Physics;11/15/1997, Vol. 107 Issue 19, p7685 

    Describes the quantum-chemical study of the vibronic structure of the phosphorescence and T[sub 1]...T[sub n] absorption spectra of naphthalene. Results of ab initio and semi-empirical calculations of the triplet states of naphthalene.

  • Phosphorescence of Poly(Methylphenyl)Silane Films. Skryshevskii, Yu. A. // Journal of Applied Spectroscopy;Sep/Oct2004, Vol. 71 Issue 5, p671 

    In the 5–100 K temperature range, the photoluminescence spectra of poly(methylphenyl)silane (PMPS) and polystyrene films doped with acetophenone, propiophenone, benzophenone, diphenyl, and naphthalene, as well as the thermostimulated luminescence spectra of neat PMPS films, have been...

  • Luminescence and Optical-Memory model of SrAl2O4:Eu2+,Dy3+ and Sr4Al14O25:Eu2+,Dy3+. Georgobiani, A. N.; Gutan, V. B.; Demin, V. I.; Semendyaev, S. V. // Inorganic Materials;Nov2009, Vol. 45 Issue 11, p1289 

    The photoluminescence, luminescence excitation, and phosphorescence spectra of SrAl2O4:Eu2+,Dy3+ and Sr4Al14O25:Eu2+,Dy3+ powder phosphors have been studied in detail at 80 and 300 K. A conceptual model is proposed for strontium-aluminate-based optical memory.

  • Spectral manifestations of distorted forms of Pd-porphin at helium temperatures: The effect of the matrix. Starukhin, A.S.; Kruk, N.N. // Optics & Spectroscopy;Aug2007, Vol. 103 Issue 2, p317 

    The occurrence of two noninteracting forms of Pd-porphin in the ground electronic state in a wide number of Shpolskii matrices maintained at liquid helium temperature was observed with the help of the finestructure phosphorescence spectra of these systems. The ratio between these forms can be...

  • Spectral manifestations of the splitting of the lowest triplet levels in Pd complexes of nonsymmetric porphyrins. Knyukshto, V. N.; Shul’ga, A. M.; Sagun, E. I.; Zen’kevich, É. I. // Optics & Spectroscopy;Dec2006, Vol. 101 Issue 6, p895 

    Based on the study of the phosphorescence and phosphorescence excitation spectra of Pd(II) tetramethylporphyrin (PdTMP) and Pd(II) tetramethyldiethylporphyrin (PdTMDEP) in solutions in 2-methyltetrahydrofuran and dodecane in the temperature range 77–283 K, the occurrence of the splitting...

  • Luminescence of biologically active 24-epicastasterone and a model compound. Borisevich, N.; Bagnich, S.; Raichenok, T.; Knyukshto, V.; Baranovskii, A.; Zhabinskii, V. // Journal of Applied Spectroscopy;Mar2008, Vol. 75 Issue 2, p187 

    Biologically active brassinosteroid 24-epicastasterone, ring B of which contains a C=O group and has the nπ*-configuration for a low-lying electronic excited state, exhibits rapid fluorescence. The wavelengths of the fluorescence maxima of the steroid dissolved in hexane and acetonitrile are...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics