中国物理B ›› 2015, Vol. 24 ›› Issue (5): 57801-057801.doi: 10.1088/1674-1056/24/5/057801
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
刘建明a, 张洁a, 林文禹a, 叶孟欣a, 冯向旭a, 张东炎a, Steve Dinga, 徐宸科a, 刘宝林b
Liu Jian-Ming (刘建明)a, Zhang Jie (张洁)a, Lin Wen-Yu (林文禹)a, Ye Meng-Xin (叶孟欣)a, Feng Xiang-Xu (冯向旭)a, Zhang Dong-Yan (张东炎)a, Steve Dinga, Xu Chen-Ke (徐宸科)a, Liu Bao-Lin (刘宝林)b
摘要: In this paper, we investigate the effect of pressure on the growth mode of high quality (10-11) GaN using an epitaxial lateral over growth (ELO) technique by metal organic chemical vapor deposition (MOCVD). Two pressure growth conditions, high pressure (HP) 1013 mbar and low pressure growth (LP) 500 mbar, are employed during growth. In the high pressure growth conditions, the crystal quality is improved by decreasing the dislocation and stack fault density in the strip connection locations. The room temperature photoluminescence measurement also shows that the light emission intensity increases three times using the HP growth condition compared with that using the LP growth conditions. In the low temperature (77 K) photoluminescence, the defects-related peaks are very obvious in the low pressure growth samples. This result also indicates that the crystal quality is improved using the high pressure growth conditions.
中图分类号: (Photoluminescence, properties and materials)