Journal
MATERIALS
Volume 3, Issue 4, Pages 2218-2259Publisher
MDPI
DOI: 10.3390/ma3042218
Keywords
ZnO thin film; fabrication methods; luminescent properties; defect states; conductive types; nanostructured ZnO; light; emitting diodes
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Funding
- National Science Council, Taiwan
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Zinc oxide (ZnO) is a potential candidate material for optoelectronic applications, especially for blue to ultraviolet light emitting devices, due to its fundamental advantages, such as direct wide band gap of 3.37 eV, large exciton binding energy of 60 meV, and high optical gain of 320 cm(-1) at room temperature. Its luminescent properties have been intensively investigated for samples, in the form of bulk, thin film, or nanostructure, prepared by various methods and doped with different impurities. In this paper, we first review briefly the recent progress in this field. Then a comprehensive summary of the research carried out in our laboratory on ZnO preparation and its luminescent properties, will be presented, in which the involved samples include ZnO films and nanorods prepared with different methods and doped with n-type or p-type impurities. The results of ZnO based LEDs will also be discussed.
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