Optical properties of ZnO rods formed by metalorganic chemical vapor deposition
Optical properties of ZnO rods formed by metalorganic chemical vapor deposition
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DOI：
10.1063/1.1605803
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发表时间：
2003-08-25
影响因子：
4
通讯作者：
Usami, N
中科院分区：
文献类型：
--
作者：
Zhang, BP;Binh, NT;Usami, N
采用金属有机化学气相沉积法在蓝宝石（0001）衬底上直接制备了高质量的ZnO棒。在低温下，杆状材料表现出自由激子和非常尖锐的束缚激子发射。通过增加激发强度，可以观察到双激子发射。发射光谱的温度依赖性表明，在3.315 eV附近的发射峰是由供体-受体对引起的，而不是中性的受体结合激子发射。受体结合能约为107 meV，这与类氢原子受体模型的估计结果非常吻合。(C) 2003年美国物理研究所。
High-quality ZnO rods were formed directly on sapphire (0001) substrates by metalorganic chemical vapor deposition. The rods exhibited free exciton and very sharp bound exciton emissions at low temperatures. By increasing the excitation intensity, biexciton emission was observed. Temperature dependence of the emission spectra suggested that the emission peak at similar to3.315 eV, which had been attributed to neutral acceptor-bound exciton emission, is due to donor-acceptor pairs. The acceptor binding energy was determined to be about 107 meV, which agrees well with that estimated from a hydrogen-atom-like acceptor model. (C) 2003 American Institute of Physics.