TITLE

Effect of thermal annealing of Ni/Au ohmic contact on the leakage current of GaN based light emitting diodes

AUTHOR(S)
Chin-Yuan Hsu; Wen-How Lan; YewChung Sermon Wu
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/22/2003, Vol. 83 Issue 12, p2447
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effect of thermal annealing on current–voltage properties of GaN light emitting diodes (LEDs) has been studied. At annealing temperatures above 700 °C, the p–n junction of the diodes became very leaky and Ga-contained metallic bubbles were observed on the surface of Ni/Au p-ohmic contact. Transmission electron microscopy and energy dispersive x-ray spectrometer studies revealed that these metallic bubbles resided directly on top of the threading dislocations in GaN and both Ni and Au were indiffused into the LED structure along the cores of the TDs. The conducting paths formed by the metal containing dislocation cores are believed to be the cause for the observed short circuit behavior of p–n junctions at high annealing temperatures. © 2003 American Institute of Physics.
ACCESSION #
10848384

 

Related Articles

  • Evaluation of experimental techniques for In-line Ion Implantation Characterization. Vignoud, L.; Milesi, F.; Nolot, E.; Danel, A.; Favier, S. // AIP Conference Proceedings;9/28/2009, Vol. 1173 Issue 1, p84 

    This work presents an as exhaustive as possible review of methods which can be applied for in-line monitoring of implant processes. The dynamic of each technique was evaluated for several typical applications. This review shows that methods which are sensitive to electrically active dopants with...

  • Microstructural Features of Rolled Mg-3Al-1Zn. Barnett, M. R.; Keshavarz, Z.; Nave, M. D. // Metallurgical & Materials Transactions. Part A;Jul2005, Vol. 36 Issue 7, p1697 

    The microstructures of hot- and cold-rolled Mg-3Al-1Zn (AZ31) are examined using scanning electron and optical microscopy. It is shown that the microstructures following multipass hot rolling and annealing are more uniform than those formed by heavy single pass rolling and annealing. The...

  • Effects of heat treatment process and niobium addition on the microstructure and mechanical properties of low carbon steel weld metal. Lu, Shanping; Wei, Shitong; Li, Dianzhong; Li, Yiyi // Journal of Materials Science;May2010, Vol. 45 Issue 9, p2390 

    The mechanical properties and microstructure were evaluated and analyzed by optical microscopy (OM) and transmission electron microscopy (TEM) for micro-alloy carbon steel weld metal with and without Nb addition, respectively, under different heat treatment processes including stress relief...

  • Electrochemical Behavior of Pure Copper in Phosphate Buffer Solutions: A Comparison Between Micro- and Nano-Grained Copper. Imantalab, O.; Fattah-alhosseini, A.; Keshavarz, M.; Mazaheri, Y. // Journal of Materials Engineering & Performance;Feb2016, Vol. 25 Issue 2, p697 

    In this work, electrochemical behavior of annealed (micro-) and nano-grained pure copper (fabricated by accumulative roll bonding process) in phosphate buffer solutions of various pH values ranging from 10.69 to 12.59 has been studied. Before any electrochemical measurements, evaluation of...

  • Thermal Behavior of Graded Ta-Si/Ta-Si-N Diffusion Barriers for Cu Metallization. Hübner, R.; Hecker, M.; Wetzig, K.; Heuer, H.; Wenzel, Ch.; Engelmann, H.-J.; Zschech, E. // AIP Conference Proceedings;2006, Vol. 817 Issue 1, p59 

    Using glancing angle X-ray diffraction, glow discharge optical emission spectroscopy, and transmission electron microscopy, the crystallization behavior and thermal stability of graded Ta-Si/Ta-Si-N diffusion barriers was analyzed after annealing at various temperatures. For a...

  • Annealing: Making metals workable. Petry // Metal Center News;Sep99, Vol. 39 Issue 10, p24 

    Offers an overview of annealing. Features of bell-type hydrogen annealing equipment; Real world applications of the annealing technology; Reduction of brittleness of metals through annealing; Distortion of steel's grain structure beyond its elastic limit; Increase of ductility; Relief of...

  • High thermal stability of magnetic tunnel junctions with oxide diffusion barrier layers. Fukumoto, Yoshiyuki; Shimura, Ken-ichi; Kamijo, Atsushi; Tahara, Shuichi; Yoda, Hiroaki // Applied Physics Letters;1/12/2004, Vol. 84 Issue 2, p233 

    We developed two types of magnetic tunnel junctions (MTJs) that showed high thermal stability. One is a PtMn exchange-biased spin-valve MTJ with a CoFe/Al-oxide (AlOx)/NiFe free layer and a CoFeTaOx/CoFe pinned layer, and the other is a pseudo-spin-valve (PSV) MTJ with a CoFe/AlOx/NiFe soft...

  • ISIL Ä°ÅžLEMÄ°N AKIMSIZ NÄ°-B KAPLANAN SAF TÄ°TANYUMUN YAPISINA ETKÄ°SÄ°. BÜLBÜL, Ferhat; ÇELİK, İlhan // Journal of the Faculty of Engineering & Architecture of Gazi Uni;2014, Vol. 29 Issue 1, p89 

    Pure titanium has a very large potential for use industrially due to its low weight, however, its usage continues to be limited because it possesses some disadvantages such as low hardness and wear resistance, weak corrosion resistance in high temperatures and high cost. In order to strengthen...

  • Amorphization and ultrafine-scale recrystallization in shear bands formed in shock-consolidated Pr2Fe14B/α-Fe nanocomposite magnets. Li, J.; Jin, Z. Q.; Liu, J. P.; Wang, Z. L.; Thadhani, N. N. // Applied Physics Letters;9/20/2004, Vol. 85 Issue 12, p2223 

    Amorphization and ultrafine-scale recrystallization within shear bands formed in shock-consolidated Pr2Fe14B/α-Fe nanocomposite magnetic powder compacts have been observed using transmission electron microscopy. The shear bands span through multiple grain lengths and truncate preexisting...

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