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Structural And Optical Properties Of Polar And Non-polar Zno Films Grown By Movpe

机译:Movpe生长的极性和非极性Zno薄膜的结构和光学性质

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Polar and non-polar ZnO films were synthesized on different planecuts (a-, c- and R-planes) of Al_2O_3 substrates by metal-organic vapor-phase epitaxy. Polar ZnO films were obtained on c- and a-Al_2O_3 substrates whereas non-polar ZnO films were obtained on R-Al_2O_3 substrates. In spite of generally better crystalline quality and optical properties of polar ZnO films, there are two characteristic photoluminescence peaks detected in the non-polar material only. The peaks (at 3.048 and 2.966 eV) are tentatively assigned to electron transitions involving zinc vacancy and oxygen interstitial defect states, respectively.
机译:通过金属有机气相外延在Al_2O_3衬底的不同平面上(a,c和R平面)合成了极性和非极性ZnO薄膜。在c-和a-Al_2O_3基板上获得极性ZnO膜,而在R-Al_2O_3基板上获得非极性ZnO膜。尽管极性ZnO膜的晶体质量和光学性能通常更好,但仅在非极性材料中检测到两个特征性光致发光峰。分别将峰值(3.048和2.966 eV)分配给涉及锌空位和氧间隙缺陷状态的电子跃迁。

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