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A comparative analysis of deep level emission in ZnO layers deposited by various methods
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TLDR
In this paper, the origin of visible luminescence from ZnO layers deposited on p-Si substrates by various growth methods using temperature dependent photoluminescence measurements was examined.Abstract:
This study examined the origin of visible luminescence from ZnO layers deposited on p-Si substrates by various growth methods using temperature dependent photoluminescence measurements. The deep level emissions of ZnO layers are found to be strongly dependent on the growth conditions and growth methods used. For the samples grown by sputtering, the visible emission consisted of violet, green, and orange-red regions, which corresponded to zinc interstitial (Zni), oxygen vacancy (VO), and oxygen interstitial (Oi) defect levels, respectively. In contrast, the deep level emissions of metal organic chemical vapor deposition grown samples consisted of blue and green emissions and blue and orange-red emissions at low and high oxygen flow rates, respectively. The ZnO nanorods synthesized by thermal evaporation showed a dominant deep level emission at the green region, which is associated with oxygen vacancies (VO).read more
Citations
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ZnO nanostructures for optoelectronics: Material properties and device applications
TL;DR: In this paper, a brief overview of synthesis methods of ZnO nanostructures, with particular focus on the growth of perpendicular arrays of nanorods/nanowires which are of interest for optoelectronic device applications.
Journal ArticleDOI
One-Dimensional Metal-Oxide Nanostructures: Recent Developments in Synthesis, Characterization, and Applications
TL;DR: A comprehensive review of recent developments in novel synthesis, exceptional characteristics, and prominent applications of one-dimensional nanostructures of tungsten oxides, molybdenum oxide, tantalum oxides and tin oxides is provided in this article.
Journal ArticleDOI
Zinc oxide nanorod based photonic devices: recent progress in growth, light emitting diodes and lasers.
Magnus Willander,Omer Nur,Qing Xiang Zhao,Lili Yang,Michael Lorenz,Bingqiang Cao,J. Zuniga Perez,C. Czekalla,G. Zimmermann,Marius Grundmann,Andrey Bakin,Arne Behrends,M. Al-Suleiman,Abdelhamid El-Shaer,A. Che Mofor,B. Postels,Andreas Waag,Nikos Boukos,A. Travlos,Ho-Sang Kwack,J Guinard,D. Le Si Dang +21 more
TL;DR: Light emitting diodes based on n-ZnO nanorods combined with different technologies (hybrid technologies) are suggested and the recent electrical, as well as electro-optical, characteristics of these LEDs are shown and discussed.
Journal ArticleDOI
Luminescence from Zinc Oxide Nanostructures and Polymers and their Hybrid Devices
Magnus Willander,Omer Nur,J. R. Sadaf,Muhammad Israr Qadir,Saima Zaman,A. Zainelabdin,N. Bano,Ijaz Hussain +7 more
TL;DR: In this article, the origin of visible emission centers in ZnO nanorods grown with different approaches is discussed, and the observed optical, electrical, and electro-optical characteristics of these LEDs are discussed with an emphasis on the deep level centers that cause the emission.
Journal ArticleDOI
Role of zinc interstitials and oxygen vacancies of ZnO in photocatalysis: a bottom-up approach to control defect density
TL;DR: A logical comparison of the relative defect densities of Zn(i)s and V(O)s suggested that the former are less efficient than the latter because of the differences in the intrinsic nature and the physical accessibility of the defects.
References
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Journal ArticleDOI
A comprehensive review of zno materials and devices
Ümit Özgür,Ya. I. Alivov,C. Liu,A. Teke,Michael A. Reshchikov,Seydi Doğan,Vitaliy Avrutin,Sang-Jun Cho,Hadis Morkoç +8 more
TL;DR: The semiconductor ZnO has gained substantial interest in the research community in part because of its large exciton binding energy (60meV) which could lead to lasing action based on exciton recombination even above room temperature.
Journal ArticleDOI
Room-temperature ultraviolet nanowire nanolasers
Michael H. Huang,Samuel S. Mao,Henning Feick,Haoquan Yan,Yiying Wu,Hannes Kind,Eicke R. Weber,Richard E. Russo,Peidong Yang,Peidong Yang +9 more
TL;DR: Room-temperature ultraviolet lasing in semiconductor nanowire arrays has been demonstrated and self-organized, <0001> oriented zinc oxide nanowires grown on sapphire substrates were synthesized with a simple vapor transport and condensation process.
Journal ArticleDOI
Nanobelts of Semiconducting Oxides
TL;DR: The beltlike morphology appears to be a distinctive and common structural characteristic for the family of semiconducting oxides with cations of different valence states and materials of distinct crystallographic structures, which could be an ideal system for fully understanding dimensionally confined transport phenomena in functional oxides.
Journal ArticleDOI
Temperature dependence of the energy gap in semiconductors
TL;DR: In this article, a relation for the variation of the energy gap (E g ) with temperature (T ) in semiconductors is proposed. And the equation satisfactorily represents the experimental data for diamond, Si, Ge, 6H-SiC, GaAs, InP and InAs.
Journal ArticleDOI
Recent Advances in ZnO Materials and Devices
TL;DR: Wurtzitic ZnO is a widebandgap semiconductor which has many applications, such as piezoelectric transducers, varistors, phosphors, and transparent conducting films as discussed by the authors.
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