Triple-layer passivation for longevity of polymer light-emitting diodes

Kwon, Seung Ho; Paik, Sang Yoon; Kwon, Oh Jun; Yoo, Jae Soo
December 2001
Applied Physics Letters;12/24/2001, Vol. 79 Issue 26, p4450
Academic Journal
A poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene](MEH-PPV) light-emitting diode was coated with passivation layers in order to improve the longevity of conjugated polymer-based diodes. High-density polyethylene (HDPE), which is an insulator, was used as the passivation material in combination with a metal layer to minimize oxygen and water diffusion into the polymer light-emitting diodes. The simplicity of the HDPE(1 μm)/Al–Li(120 nm)/HDPE(1 μm) structure, which was successively thermal coated on the diode, was demonstrated. The longevity of this simple structure was dramatically enhanced after exposure to atmospheric oxygen and moisture. © 2001 American Institute of Physics.


Related Articles

  • Instabilities in electroluminescent porous silicon diodes. Linnros, J.; Lalic, N.; Kna´pek, P.; Luterova´, K.; Kocˇka, J.; Fejfar, A.; Pelant, I. // Applied Physics Letters;8/5/1996, Vol. 69 Issue 6, p833 

    The stability of high quantum efficiency, porous silicon (PS) electroluminescent (EL) diodes have been analyzed under pulsed operation. The results show that EL exhausting is due to a charging of the PS network which recovery is thermally activated (Er∼0.4 eV). This suggests a charge...

  • White light from an electroluminescent diode made from poly[3(4-octylphenyl)-2,2’-bithiophene] and an oxadiazole derivative. Berggren, M.; Gustafsson, G.; Inganäs, O.; Andersson, M. R.; Hjertberg, T.; Wennerström, O. // Journal of Applied Physics;12/1/1994, Vol. 76 Issue 11, p7530 

    Reports on an electroluminescent diode emitting red, green and blue light simultaneously based on a thin polymer layer, poly[3-(4-octylphenyl)-2,2'-bithiopene] (PTOPT) and a thick molecular layer, 2-(4-biphenylyl)-5-(4-tertbutyl-phenyl)1,3,5-oxadiazole. Description of the diode structure;...

  • RGB Full Color LEDs.  // ECN: Electronic Component News;Nov2002, Vol. 46 Issue 12, p1 

    Reports on the introduction of the Chameleon Full Color Series light emitting diode (LED) products by Kingbright. Dimensions and capacity; Contact information.

  • Engineer in wonderland: LED candles.  // Electronics Weekly;7/9/2008, Issue 2344, p22 

    A photograph of fake night-lights-in-a-glass based on LEDs from Philips Electronics Inc. is presented.

  • Pulsed excitation of low-mobility light-emitting diodes: Implication for organic lasers.  // Applied Physics Letters;5/10/1999, Vol. 74 Issue 19, p2764 

    Studies the pulsed excitation of low-mobility light-emitting diodes. Low mobility and high charge density within an electrically pumped structure; Broad spectrum of the charge-induced absorption.

  • Low-onset organic blue light emitting devices obtained by better interface control. Koch, N.; Pogantsch, A.; Leising, G.; Blyth, R.I.R.; Ramsey, M.G.; Netzer, F.P. // Applied Physics Letters;5/17/1999, Vol. 74 Issue 20, p2909 

    Demonstrates that highly efficient single-layer light emitting devices can be realized by better control in the device production process. Cross section of the device studied using Auger depth profiling and spectroscopy; Interface between the active material and the metal cathode; Concentration...

  • Direct imaging of the spectral emission characteristic of an InGaN/GaN-ultraviolet light-emitting... Fischer, Peter; Christen, Jurgen // Applied Physics Letters;11/29/1999, Vol. 75 Issue 22, p3440 

    Studies the spectral emission characteristic of an InGaN/GaN-ultraviolet light-emitting diode. Luminescence intensity maps; Peak-wavelength scanning images; Indium concentrations.

  • Electroluminescence of a novel terbium complex. Gao, X. C.; Cao, Hong; Huang, Chunhui; Li, Biaoguo; Umitani, Shigeo // Applied Physics Letters;5/4/1998, Vol. 72 Issue 18 

    We describe efficient electroluminescence from a terbium complex, tris-(1-phenyl-3-methyl-4isobutyryl-5-pyrozolone)-bis(triphenyl phosphine oxide) terbium (PTT). The green-emitting material possesses much higher photoluminescence efficiency compared to the commonly used green light emitter,...

  • Battle of the Bulbs. Weed, William Speed // Current Science;3/18/2005, Vol. 90 Issue 13, p10 

    Focuses on light-emitting diodes. INSET: Bright Ideas.


Read the Article


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

Try another library?
Sign out of this library

Other Topics