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Influence of ZnO se...
Influence of ZnO seed layer precursor molar ratio on the density of interface defects in low temperature aqueous chemically synthesized ZnO nanorods/GaN light-emitting diodes
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- Alnoor, Hatim (författare)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska fakulteten
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- Pozina, Galia (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
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- Khranovskyy, Volodymyr (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Liu, Xianjie (författare)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
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- Iandolo, Donata (författare)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Willander, Magnus (författare)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Nur, Omer (författare)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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(creator_code:org_t)
- AMER INST PHYSICS, 2016
- 2016
- Engelska.
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Ingår i: Journal of Applied Physics. - : AMER INST PHYSICS. - 0021-8979 .- 1089-7550. ; 119:16, s. 165702-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Low temperature aqueous chemical synthesis (LT-ACS) of zinc oxide (ZnO) nanorods (NRs) has been attracting considerable research interest due to its great potential in the development of light-emitting diodes (LEDs). The influence of the molar ratio of the zinc acetate (ZnAc): KOH as a ZnO seed layer precursor on the density of interface defects and hence the presence of non-radiative recombination centers in LT-ACS of ZnO NRs/GaN LEDs has been systematically investigated. The material quality of the as-prepared seed layer as quantitatively deduced by the X-ray photoelectron spectroscopy is found to be influenced by the molar ratio. It is revealed by spatially resolved cathodoluminescence that the seed layer molar ratio plays a significant role in the formation and the density of defects at the n-ZnO NRs/p-GaN heterostructure interface. Consequently, LED devices processed using ZnO NRs synthesized with molar ratio of 1:5M exhibit stronger yellow emission (similar to 575 nm) compared to those based on 1:1 and 1:3M ratios as measured by the electroluminescence. Furthermore, seed layer molar ratio shows a quantitative dependence of the non-radiative defect densities as deduced from light-output current characteristics analysis. These results have implications on the development of high-efficiency ZnO-based LEDs and may also be helpful in understanding the effects of the ZnO seed layer on defect-related non-radiative recombination. Published by AIP Publishing.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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- art (ämneskategori)
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