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An effective low-te...
An effective low-temperature solution synthesis of Co-doped [0001]-oriented ZnO nanorods
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- Alnoor, Hatim (författare)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska fakulteten
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- Savoyant, Adrien (författare)
- Aix Marseille University, France
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- Liu, Xianjie (författare)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
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- Pozina, Galia (författare)
- Linköpings universitet,Tunnfilmsfysik,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, 2017
- 2017
- Engelska.
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Ingår i: Journal of Applied Physics. - : AMER INST PHYSICS. - 0021-8979 .- 1089-7550. ; 121:21
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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Abstract
Ämnesord
Stäng
- We demonstrate an efficient possibility to synthesize vertically aligned pure zinc oxide (ZnO) and Co-doped ZnO nanorods (NRs) using the low-temperature aqueous chemical synthesis (90 degrees C). Two different mixing methods of the synthesis solutions were investigated for the Co-doped samples. The synthesized samples were compared to pure ZnO NRs regarding the Co incorporation and crystal quality. Electron paramagnetic resonance (EPR) measurements confirmed the substitution of Co2+ inside the ZnO NRs, giving a highly anisotropic magnetic Co2+ signal. The substitution of Zn2+ by Co2+ was observed to be combined with a drastic reduction in the core-defect (CD) signal (g similar to 1.956) which is seen in pure ZnO NRs. As revealed by the cathodoluminescence (CL), the incorporation of Co causes a slight red-shift of the UV peak position combined with an enhancement in the intensity of the defect-related yellow-orange emission compared to pure ZnO NRs. Furthermore, the EPR and the CL measurements allow a possible model of the defect configuration in the samples. It is proposed that the as-synthesized pure ZnO NRs likely contain Zn interstitial (Zn-i(+)) as CDs and oxygen vacancy (V-O) or oxygen interstitial (O-i) as surface defects. As a result, Co was found to likely occupy the Zn-i(+), leading to the observed CDs reduction and hence enhancing the crystal quality. These results open the possibility of synthesis of highly crystalline quality ZnO NRs-based diluted magnetic semiconductors using the low-temperature aqueous chemical method. Published by AIP Publishing.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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