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ZnO/ZnMgO单量子阱室温发光性质的研究
发表时间:2011-05-15 浏览量:1445 下载量:695
全部作者: | 王彦杰,张世著,何海平,叶志镇 |
作者单位: | 浙江大学硅材料国家重点实验室 |
摘 要: | 采用脉冲激光沉积(pulsed laser deposition, PLD)技术,在Si(111)衬底上生长了不同阱宽的ZnO/ZnMgO 单量子阱。室温下,对于不同阱宽的ZnO/ZnMgO单量子阱样品均观测到阱层激子光致发光现象。随着阱层宽度的减小,发光峰位出现蓝移,这是由量子约束效应引起的。采用一维有限深势阱模型,对于阱宽与激子能量的关系进行理论计算,并与实验值进行比较,二者吻合较好。室温下观察到ZnO/ZnMgO 单量子阱的量子约束效应,说明生长的单量子阱有良好的界面和结晶性质。 |
关 键 词: | 材料物理与化学;ZnO/ZnMgO单量子阱;光致发光;量子约束效应 |
Title: | Room-temperature photoluminescence from ZnO/ZnMgO single quantum well |
Author: | WNAG Yanjie, ZHANG Shizhu, HE Haiping, YE Zhizhen |
Organization: | State Key Laboratory of Silicon Materials, Zhejiang University |
Abstract: | ZnO/ZnMgO single quantum wells (SQWs) with different well layer thickness have been grown on Si (111) substrates by pulsed laser deposition (PLD). Compared with the ZnO single layer, room-temperature photoluminescence resulting from the well regions exhibits a blueshift. Also, the blueshift increases with the decrease of the well thickness. The well layer thickness dependence of the emission energy was calculated by a simple theoretical model and compared with the experimental data. The observation of quantum confinement effects at room temperature suggests the sharp interface and good crystal quality of the grown SQW. |
Key words: | materials physics and chemistry; ZnO/ZnMgO single quantum well; photoluminescence; quantum confinement effects |
发表期数: | 2011年5月第9期 |
引用格式: | 王彦杰,张世著,何海平,等. ZnO/ZnMgO单量子阱室温发光性质的研究[J]. 中国科技论文在线精品论文,2011,4(9):841-844. |
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