A novel method to synthesize blue-luminescent doped GaN powders

R. Garcia, A. Thomas, A. Bell, Fernando Ponce

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A new method to synthesize highly luminescent GaN:Mg powders has been developed. This method has a high control over the concentration of magnesium in the final product. The method consists of reacting a high purity (99.999%) gallium-magnesium alloy with ultra-high purity ammonia in a horizontal quartz tube reactor at high temperatures for several hours. Electron microscopy showed that the light-gray powders produced by this method consist of at least two different shaped crystallites; large columnar crystals sized around 10 μm and small platelets crystals between 1 and 2 μm. X-ray diffraction showed that those crystallites have a well defined wurtzite structure. Room temperature photoluminescence (PL) and cathodoluminescence (CL) showed a high intensity blue emission around 2.94 eV (422 nm). At helium temperature the well known Mg-related donor-acceptor pair band was observed at 3.25 eV (380 nm) by PL and CL.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsS. Ashok, J. Chevallier, B.L. Sopori, M. Tabe, P. Kiesel
Pages277-281
Number of pages5
Volume864
StatePublished - 2005
Event2005 materials Research Society Spring Meeting - San Francisco, CA, United States
Duration: Mar 28 2005Apr 1 2005

Other

Other2005 materials Research Society Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period3/28/054/1/05

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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    Garcia, R., Thomas, A., Bell, A., & Ponce, F. (2005). A novel method to synthesize blue-luminescent doped GaN powders. In S. Ashok, J. Chevallier, B. L. Sopori, M. Tabe, & P. Kiesel (Eds.), Materials Research Society Symposium Proceedings (Vol. 864, pp. 277-281). [E6.10]