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首页> 外文期刊>Journal of Crystal Growth >MBE growth of novel MgSe/ZnSeTe:N II-VI compound superlattice quasi-quaternaries on InP substrates and application to light-emitting diodes
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MBE growth of novel MgSe/ZnSeTe:N II-VI compound superlattice quasi-quaternaries on InP substrates and application to light-emitting diodes

机译:InP衬底上新型MgSe / ZnSeTe:N II-VI复合超晶格准四元共聚物的MBE生长及其在发光二极管中的应用

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摘要

Novel MgSe/ZnSeTe:N II-VI compound superlattice quaternaries (SL-QQs) were grwon on InP substrrates by molecular beam epitaxy with p-type doping using a RF-radical nitrogen source. The SL-QQs with various equivalent Mg compositions (x_Mg) were prepared by changing the MgSe layer compostion in the superlattice. The photoluminescence peak energy at 15 K increased from 2.11 to 2.68 eV with increasign x_Mg from 0 to 0.76. A hole concentration over 2×10~18 cm~-3 was obtained for x_Mg of 0.14, and the doping level monotonically decreased with increasing x_Mg. By changin the doping process, the doping property was improved, and a hole concentration of about 3×10~17 cm~-3 was realized even for x_Mg of 0.4 ZnCdSe/MgZnCdSe(Te) lith emitting diodes were fabricated on InP substrates using MgSe/ZnSeTe SL-QQs as p-side cladding laeyrs. Yellow light emissions around 577 nm were observed under a pulsed current injection at 77 K.
机译:新型的MgSe / ZnSeTe:N II-VI复合超晶格四级原子(SL-QQs)通过分子束外延和RF氮源的p型掺杂在InP基体上生长。通过改变超晶格中的MgSe层组成来制备具有各种等效Mg组成(x_Mg)的SL-QQ。在15 K处的光致发光峰值能量从2.11 eV增加到2.68 eV,而x_Mg从0增加到0.76。当x_Mg为0.14时,空穴浓度超过2×10〜18 cm〜-3,并且随着x_Mg的增加,掺杂水平单调降低。通过改变掺杂工艺,改善了掺杂性能,并且即使使用MgSe在InP衬底上制造了0.4 ZnCdSe / MgZnCdSe(Te)发光二极管,也实现了约3×10〜17 cm〜-3的空穴浓度。 / ZnSeTe SL-QQs作为p侧熔覆层。在77 K的脉冲电流注入下观察到约577 nm的黄光发射。

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