A novel method to synthesize blue-luminescent doped GaN powders

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

A novel method to synthesize blue-luminescent doped GaN powders

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

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Materials Research Society Symposium Proceedings
Editors	S. Ashok, J. Chevallier, B.L. Sopori, M. Tabe, P. Kiesel
Pages	277-281
Number of pages	5
Volume	864
State	Published - 2005
Event	2005 materials Research Society Spring Meeting - San Francisco, CA, United States Duration: Mar 28 2005 → Apr 1 2005

Other

Other	2005 materials Research Society Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	3/28/05 → 4/1/05

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

Cite this

@inproceedings{efb9c58a949645e5bad702c739c2186f,

title = "A novel method to synthesize blue-luminescent doped GaN powders",

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.",

author = "R. Garcia and A. Thomas and A. Bell and Fernando Ponce",

year = "2005",

language = "English (US)",

volume = "864",

pages = "277--281",

editor = "S. Ashok and J. Chevallier and B.L. Sopori and M. Tabe and P. Kiesel",

booktitle = "Materials Research Society Symposium Proceedings",

note = "2005 materials Research Society Spring Meeting ; Conference date: 28-03-2005 Through 01-04-2005",

}

TY - GEN

T1 - A novel method to synthesize blue-luminescent doped GaN powders

AU - Garcia, R.

AU - Thomas, A.

AU - Bell, A.

AU - Ponce, Fernando

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

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M3 - Conference contribution

AN - SCOPUS:30544448350

VL - 864

SP - 277

EP - 281

BT - Materials Research Society Symposium Proceedings

A2 - Ashok, S.

A2 - Chevallier, J.

A2 - Sopori, B.L.

A2 - Tabe, M.

A2 - Kiesel, P.

T2 - 2005 materials Research Society Spring Meeting

Y2 - 28 March 2005 through 1 April 2005

ER -

A novel method to synthesize blue-luminescent doped GaN powders

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ASJC Scopus subject areas

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