中国物理B ›› 2010, Vol. 19 ›› Issue (8): 87801-087801.doi: 10.1088/1674-1056/19/8/087801
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
刘洁1, 赵艳1, 蒋毅坚1, 刘玉龙2
Liu Jie(刘洁)a), Zhao Yan(赵艳)a), Jiang Yi-Jian(蒋毅坚)a), and Liu Yu-Long(刘玉龙)b)†
摘要: In this paper, we investigate the laser irradiation of ZnO single crystals and its influence on photoluminescence. Our study shows that the photoluminescence of ZnO single crystals strongly depends on surface morphologies. The ultraviolet emissions of laser treated-ZnO under 200 mJ/cm2 become stronger, whereas for those deteriorated by irradiation above 200 mJ/cm2, the green emissions centred at 2.53 eV are significantly enhanced with a red-shift to 2.19 eV, probably due to the changes in the charge states of the defects. Enhanced yellow-green emissions are well resolved into four peaks at around 1.98, 2.19, 2.36, and 2.53 eV due to a shallow irradiation depth. Possible origins are proposed and discussed.
中图分类号: (Ultraviolet, visible, and infrared radiation effects (including laser radiation))