Synthesis of rare-earth activated AlN and GaN powders via a three-step conversion process

Jonathan H. Tao, Nestor Perea-Lopez, Joanna McKittrick, Jan B. Talbot, Keith Klinedinst, Madis Raukas, Joseph Laski, Kailash C. Mishra, Gustavo Hirata

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


Using a three-step solution method, we have successfully synthesized rare-earth (RE) activated AlN, GaN, and pure GaAlN powders. Aluminium and/or gallium nitrates are first dissolved in water. For AlN:RE, rare-earth nitrates converted from their corresponding oxides of Dy3+ and Tm3+ are then added to the precursor nitrate solution. The mixture is subsequently converted into Al(OH)3:RE by combining with aqueous NH4OH at room temperature. The product is then mixed with aqueous NH4F to form (NH4)3AlF6:RE. The conversion process is complete when the hexafluoride compound is flushed with anhydrous ammonia to produce the final nitride product AlN:Dy3+,Tm3+. GaN, GaN:Tb3+ and GaAlN are synthesized similarly. Single phase, pure GaN and GaAlN formation has been confirmed. Dysprosium oxide has been observed in AlN:Dy3+, Tm3+. Oxygen concentration of approximately 4 at% has been measured in GaN powders, and is slightly higher in AlN powders. Spectroscopic measurements show clearly observable emission from Dy3+ and Tm3+ coactivated AlN samples. In activated GaN samples, Tb 3+ emission has been observed.

Original languageEnglish (US)
Pages (from-to)1889-1891
Number of pages3
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number6
StatePublished - 2008
Event7th International Conference of Nitride Semiconductors, ICNS-7 - Las Vegas, NV, United States
Duration: Sep 16 2007Sep 21 2007

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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