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Thermal stability of CdZnO thin films grown by molecular-beam epitaxy

机译:分子束外延生长CdZnO薄膜的热稳定性

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摘要

CdZnO thin films with near-band-edge (NBE) photoluminescence (PL) emission from 2.39 eV to 2.74 eV were grown by plasma-assisted molecular-beam epitaxy on c-plane sapphire substrates with 800℃ in situ annealing. CdZnO thin films evolve from pure wurtzite (wz) structure, to mixture of wz and rock-salt (rs) structures confirmed by X-ray diffraction studies. Rapid-thermo-annealing (RTA) was performed on in situ annealed CdZnO samples. Pure wz CdZnO shows insignificant NBE PL peak shift after RTA, while mixture structure CdZnO shows evident blue shifts due to phase change after annealing, indicating the rs phase CdZnO changes to wz phase CdZnO during RTA process.
机译:通过等离子辅助分子束外延在800℃原位退火的c面蓝宝石衬底上生长具有2.39 eV至2.74 eV的近带边缘(NBE)光致发光(PL)的CdZnO薄膜。 CdZnO薄膜从纯纤锌矿(wz)结构演变为wz和岩盐(rs)结构的混合物,通过X射线衍射研究已证实。快速原位退火(RTA)在原位退火的CdZnO样品上进行。纯wz CdZnO在RTA后显示出微不足道的NBE PL峰移,而混合结构CdZnO由于退火后的相变而显示出明显的蓝移,表明在RTA过程中rs相CdZnO变为wz相CdZnO。

著录项

  • 来源
    《Applied Surface Science》 |2010年第14期|p.4734-4737|共4页
  • 作者单位

    Quantum Structures Laboratory. Department of Electrical Engineering, University of California, Riverside, CA 92521, USA;

    rnQuantum Structures Laboratory. Department of Electrical Engineering, University of California, Riverside, CA 92521, USA;

    rnQuantum Structures Laboratory. Department of Electrical Engineering, University of California, Riverside, CA 92521, USA;

    rnQuantum Structures Laboratory. Department of Electrical Engineering, University of California, Riverside, CA 92521, USA;

    rnQuantum Structures Laboratory. Department of Electrical Engineering, University of California, Riverside, CA 92521, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ZnO; thermal stability; molecular-beam epitaxy; II-VI semiconductors; x-ray diffraction; photoluminescence;

    机译:氧化锌;热稳定性;分子束外延;II-VI半导体;X射线衍射;光致发光;

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