Tunable built-in electric field and optical properties in wurtzite ZnO/MgZnO quantum wells
作者： Congxin Xia , Heng Zhang , Jiao An , Shuyi Wei , Yu Jia
DOI: 10.1016/J.PHYSLETA.2014.05.015
关键词: Quantum well 、 Barrier layer 、 Exciton 、 Condensed matter physics 、 Wavelength 、 Electric field 、 Recombination rate 、 Wurtzite crystal structure 、 Physics 、 Exciton binding energy
摘要: Abstract Based on the effective-mass approximation, built-in electric field, exciton states and optical properties are investigated theoretically in wurtzite (WZ) ZnO/MgZnO quantum wells (QWs). Numerical results show that can be tuned effectively by MgZnO barrier layer QWs. When width is decreased, field F w interband emission wavelength decreased. However, binding energy electron–hole recombination rate increase with increasing width. In particular, approaches zero when QWs structural parameters large WZ
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