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首页> 外文期刊>RSC Advances >Photoconductivities in m-plane and c-plane ZnO epitaxial films grown by chemical vapor deposition on LiGaO2 substrates: a comparative study
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Photoconductivities in m-plane and c-plane ZnO epitaxial films grown by chemical vapor deposition on LiGaO2 substrates: a comparative study

机译：通过化学气相沉积在LIGaO2基质上生长的M平面和C面ZnO外延膜的光电导性：对比研究

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摘要

The photoconduction properties of (non-polar) m-plane and (polar) c-plane ZnO thin films epitaxially grown on relatively lattice-matched LiGaO2 substrates by chemical vapor deposition have been investigated and compared. Structural and photoluminescence characterizations indicate that the c-plane ZnO films possess higher crystallinity than the m-plane ZnO films. Owing to their superior crystallinity and lower dark current, the c-plane ZnO films exhibit significantly higher optimal sensitivity (S = 4650) to ultraviolet light than the m-plane ZnO films (S = 10). However, in terms of photocurrent generation efficiency, the m-plane ZnO films exhibit over one order of magnitude higher responsivity (R = 0.05-3.2 A W = 1) than the c-plane ZnO films (R = 0.009-0.035 A W-1) in the light intensity range 1.6-320 W m(-2). The probable mechanisms causing the aforementioned differences based on surfacedominant photoconduction and bulk-dominant structural and photoluminescence properties are also discussed.
机译：研究了通过化学气相沉积在相对晶格匹配的LigaO 2基材上外延生长的（非极性）M平面和（极性）C面ZnO薄膜的光电电流性能。结构和光致发光特征表明，C面ZnO膜具有比M平面ZnO膜更高的结晶性。由于其优异的结晶度和较低的暗电流，C面ZnO膜的最佳敏感性显着较高，比M平面ZnO膜（S = 10）显着更高的最佳敏感性（S = 4650）至紫外线。然而，就光电流的产生效率而言，M平面ZnO膜在比C面ZnO膜（R = 0.009-0.035 A W-1 = 0.05-0.035（R = 0.05-3.2 AW = 1）上的一个数量级（R = 0.05-3.2 AW = 1）上表现出超过一个数量级（R = 0.05-3.2 AW = 1） ）在光强度范围内1.6-320 W m（-2）。还讨论了导致基于表面光敏性光电通电和散装显性结构和光致发光性质的上述差异的可能机制。

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  • 来源
    《RSC Advances》 |2016年第89期|共6页
  • 作者

    Lin C. H.; Chen R. S.; Lin Y. K.; Wang S. B.; Chen L. C.; Chen K. H.; Wen M. C.; Chou M. M. C.; Chang L.;

  • 作者单位

    Natl Taiwan Univ Sci &

    Technol Grad Inst Appl Sci &

    Technol Taipei 10607 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Grad Inst Appl Sci &

    Technol Taipei 10607 Taiwan;

    Natl Taiwan Univ Dept Phys Taipei 10617 Taiwan;

    Natl Cheng Kung Univ Inst Microelect Tainan 701 Taiwan;

    Natl Taiwan Univ Ctr Condensed Matter Sci Taipei 10617 Taiwan;

    Natl Taiwan Univ Ctr Condensed Matter Sci Taipei 10617 Taiwan;

    Natl Sun Yat Sen Univ Dept Mat &

    Optoelect Sci Kaohsiung 80424 Taiwan;

    Natl Sun Yat Sen Univ Dept Mat &

    Optoelect Sci Kaohsiung 80424 Taiwan;

    Natl Sun Yat Sen Univ Dept Mat &

    Optoelect Sci Kaohsiung 80424 Taiwan;

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  • 正文语种 eng
  • 中图分类 化学;
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