TITLE

A top-emission organic light-emitting diode with a silicon anode and an Sm/Au cathode

AUTHOR(S)
Qin, G. G.; Xu, A. G.; Ma, G. L.; Ran, G. Z.; Qiao, Y. P.; Zhang, B. R.; Chen, W. X.; Wu, S. K.
PUB. DATE
November 2004
SOURCE
Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5406
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A top-emission organic light-emitting diode (TEOLED) with a p-type silicon anode and a semitransparent samarium/gold cathode has been constructed and studied. With a structure of Al/p-Si/SiOx/N,N′-bis-(1-naphthl)-diphenyl-1,1′-biphenyl-4,4′-diamine(NPB)/Tris-(8-hydroxyquinoline)aluminum(Alq)/LiF/Al, we have found that compared to indium-tin-oxide, the p-Si anode enhances the unbalance between electron- and hole-injection, which is a disadvantage factor for the light-emitting efficiency of the TEOLED. Selecting p-Si wafers with suitable electric resistivities and inserting an ultrathin low temperature grown SiOx layer of about 1.5 nm between the anode and NPB can effectively restrict hole-injection. Moreover, a low work function Sm/Au cathode was used to enhance electron-injection. The electroluminescence efficiency of the TEOLED depends on the thickness of the Sm layer in the cathode. A current efficiency of 0.55 cd/A and a power efficiency of 0.07 lm/W have been reached.
ACCESSION #
15244103

 

Related Articles

  • High-efficiency monochrome organic light emitting diodes employing enhanced microcavities. Meerheim, Rico; Nitsche, Robert; Leo, Karl // Applied Physics Letters;7/28/2008, Vol. 93 Issue 4, p043310 

    We demonstrate enhanced light outcoupling from bottom emitting monochrome high-efficiency red, green, and blue organic light emitting diodes by adding silver layers on the indium tin oxide (ITO) anode. The devices contain the phosphorescent emitting dyes tris(2-phenylpyridine)iridium and...

  • The Effects Of Slanted Mesa Sidewall On P-N Junction GaN-Based LEDs. Othman, M. F.; Aziz, A. Abdul; Hashim, M. R. // AIP Conference Proceedings;5/20/2008, Vol. 1017 Issue 1, p89 

    Typically, most of the commercially available GaN-based LEDs (Light Emitting Diodes) are grown on sapphire as their substrates. Due to the insulating substrate, lateral current injection is employed so that the anode and cathode contacts are in side-by-side configuration. During the etching...

  • Electrically detected magnetic resonance investigations of gallium phosphide green light-emitting diodes. Reinacher, N. M.; Brandt, M. S.; Stutzmann, M. // Journal of Applied Physics;10/15/1996, Vol. 80 Issue 8, p4541 

    Presents information on a study that investigated the transport processes and degradation of GaP:N green light-emitting diodes using electrically detected magnetic response. Experimental procedure; Results and discussion on the study; Conclusions.

  • Efficiency improvement of phosphorescent organic light-emitting diodes using semitransparent Ag as anode. Peng, H. J.; Zhu, X. L.; Sun, J. X.; Yu, X. M.; Wong, M.; Kwok, H. S. // Applied Physics Letters;1/16/2006, Vol. 88 Issue 3, p033509 

    The emission efficiency in an organic light-emitting diode (OLED) based on fac tris(phenyl pyridine)iridium [Ir(ppy)3] is greatly improved using a semitransparent Ag anode. With surface modification of the Ag anode, excellent light coupling and hole injection properties can be realized. The...

  • Electron traps in organic light-emitting diodes. Tsai, Min-Jan; Meng, Hsin-Fei // Journal of Applied Physics;6/1/2005, Vol. 97 Issue 11, p114502 

    This work presents the effects of electron traps in organic light-emitting diodes using a model which includes charge injection, transport, and recombination. For electron-only devices, the electron current is reduced by the traps for several orders of magnitude at fixed voltage, and the traps...

  • Metal–organic–metal cathode for high-contrast organic light-emitting diodes. Feng, X.D.; Kangura, R.; Lu, Z.H. // Applied Physics Letters;7/19/2004, Vol. 85 Issue 3, p497 

    Organic light-emitting diodes have been fabricated using a stacked metal–organic–metal cathode structure. The first metal layer is embedded approximately between an emission layer and an electron transport layer serving as a floating electron injection electrode. The second metal...

  • Remote cathode paves way for electrically pumped organic laser.  // Laser Focus World;Mar2008, Vol. 44 Issue 3, p15 

    The article discusses the role of remote cathode path towards creating an electrically pumped organic laser. Metallic contacts quickly absorb light in organic light-emitting diodes and other organic lasing structures. With this, researchers at the Interuniversity Microelectronic Center in...

  • Polyethyleneoxide/sodium dodecyl sulfate as hole-blocking/electron-transporting layer for high-performance blue polymer light-emitting diode with oxygen- and moisture-stable aluminum cathode. Jiun-Shian Wu; Hsin-Hung Lu; Wei-Chun Hung; Guan-Hong Lin; Show-An Chen // Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023304 

    We present the case of the blend of polyethyleneoxide (PEO) with sodium dodecyl sulfate (SDS) as a hole-blocking (HB)/electron-transporting (ET) layer to allow the use of oxygen- and moisture-stable aluminum (Al) as the cathode for achieving high-performance polymer light-emitting diode. With...

  • Contrast improvement of organic light-emitting devices with Sm:Ag cathode. Lau, K. C.; Xie, W. F.; Sun, H. Y.; Lee, C. S.; Lee, S. T. // Applied Physics Letters;2/20/2006, Vol. 88 Issue 8, p083507 

    Sm:Ag, easily fabricated via simple thermal evaporation, was investigated as a single-layer light-absorbing cathode to increase the contrast ratio of organic light-emitting devices (OLEDs). The performance of OLEDs with Sm:Ag cathode was found to be comparable to that of the traditional OLEDs...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics