Excitonic origin of enhanced luminescence quantum efficiency in MgZnO/ZnO coaxial nanowire heterostructures
作者： Jinkyoung Yoo , Bonghwan Chon , Wei Tang , Taiha Joo , Le Si Dang
DOI: 10.1063/1.4721519
关键词:
摘要: The effect of exciton transport on luminescence efficiency was investigated by time-resolved photoluminescence and spatially resolved cathodoluminescence spectroscopy. internal quantum ZnO nanowire (NW) increased from 45% to 56% due formation a MgZnO/ZnO coaxial NW heterostructure. MgZnO shell layer induced decrease in the diffusion length coefficient 150 120 nm 9.8 6.4 cm2/s, respectively. change characteristics indicated that transport, addition surface passivation effect, an important factor determining
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