期刊
APPLIED PHYSICS LETTERS
卷 94, 期 24, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3157274
关键词
electroluminescence; electron-hole recombination; excitons; II-VI semiconductors; light emitting diodes; nanowires; phonons; photoluminescence; zinc compounds
资金
- National Science Foundation Nanoscale Science and Engineering Center (NSEC) [NSF/PHY06-46094]
- German Research Foundation [VO1265/3, VO1265/4-1, VO1265/4-2, Ro1198/7-1, Ro1198/7-2]
The authors study the microscopic origin of the electroluminescence from zinc oxide (ZnO) nanowire light-emitting diodes (LEDs) fabricated on a heavily doped p-type silicon (p-Si) substrate. By comparing the low-temperature photoluminescence and electroluminescence of a single nanowire LED, bound- and free-exciton related recombination processes, together with their longitudinal-optical phonon replicas, can be identified as the origin of both electroluminescence and photoluminescence.
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