Identification of oxygen and zinc vacancy optical signals in ZnO
Identification of oxygen and zinc vacancy optical signals in ZnO
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DOI：
10.1063/1.2424641
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发表时间：
2006-12-25
影响因子：
4
通讯作者：
Willander, M.
中科院分区：
文献类型：
--
作者：
Borseth, T. Moe;Svensson, B. G.;Willander, M.
用光致发光光谱法研究了在惰性、富锌和富氧气氛下系统退火的单晶ZnO样品。退火环境的选择与ZnO中经常检测到的深带发射（DBE）的位置之间存在显著的相关性。特别地，在O-2中退火得到了2.35 +/- 0.05 eV的DBE，而在金属Zn存在下退火得到了2.53 +/- 0.05 eV的DBE。作者将前者归因于锌空位（V-Zn）相关缺陷，后者归因于氧空位（V-O）相关缺陷。对V-O和V-Zn峰识别的进一步确认来自于观察，当富O和富zn退火条件切换时，效果是可逆的。在ZnO粉末存在下退火后，没有V-Zn或v - o相关带的迹象，但作者观察到一个低强度的黄色发光带，峰值在2.17 eV，可能与Li有关，Li是水热生长ZnO中常见的杂质。(c) 2006年美国物理研究所。
Photoluminescence spectroscopy has been used to study single crystalline ZnO samples systematically annealed in inert, Zn-rich and O-rich atmospheres. A striking correlation is observed between the choice of annealing ambient and the position of the deep band emission (DBE) often detected in ZnO. In particular, annealing in O-2 results in a DBE at 2.35 +/- 0.05 eV, whereas annealing in the presence of metallic Zn results in DBE at 2.53 +/- 0.05 eV. The authors attribute the former band to zinc vacancy (V-Zn) related defects and the latter to oxygen vacancy (V-O) related defects. Additional confirmation for the V-O and V-Zn peak identification comes from the observation that the effect is reversible when O- and Zn-rich annealing conditions are switched. After annealing in the presence of ZnO powder, there is no indication for the V-Zn- or V-O-related bands, but the authors observe a low intensity yellow luminescence band peaking at 2.17 eV, probably related to Li, a common impurity in hydrothermally grown ZnO. (c) 2006 American Institute of Physics.