Effect of halogen species of acidic mineralizer on solubility of GaN in supercritical ammonia

✍ Scribed by Daisuke Tomida; Taketo Kuribayashi; Kousuke Suzuki; Yuji Kagamitani; Toru Ishiguro; Tsuguo Fukuda; Chiaki Yokoyama

• Book ID: 104022430
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 170 KB
• Volume: 325
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2011.04.027

✦ Synopsis

The solubility of gallium nitride (GaN) in supercritical ammonia with either ammonium bromide (NH 4 Br) or ammonium iodide (NH 4 I) as a mineralizer was evaluated by measuring the weight loss of polycrystalline GaN on dissolution. The solubility of GaN with these mineralizers was compared with that of ammonium chloride (NH 4 Cl). The temperature dependence of the GaN solubility with different mineralizers was in the order NH 4 I 4 NH 4 Br 4NH 4 Cl. At high temperatures a high level of supersaturation was obtained with NH 4 I at a low-temperature difference to NH 4 Cl. These results suggest that use of NH 4 I as a mineralizer could increase the crystal growth rate of GaN.