研究目的
Investigating the synthesis, characterization, and UV photodetector application of Sb-doped ZnO nanowires.
研究成果
Sb-doped ZnO nanowires were successfully synthesized and characterized, showing potential for nanoscale UV photodetector applications despite the n-type conductivity observed. Further research is needed to achieve p-type conductivity.
研究不足
The competition between shallow acceptors and donors, and the influence of Sb valency on the conductivity of Sb-doped ZnO needs further investigation to obtain stable p-type ZnO.
1：Experimental Design and Method Selection:
Sb-doped ZnO nanowires were synthesized via chemical vapor deposition method using a horizontal tube furnace. High purity ZnO, graphite, and Sb2O3 powders were mixed as the source material.
2：Sample Selection and Data Sources:
Commercial a-plane Al2O3 substrates were used, chemically cleaned and deposited with an ultra-thin Au film as catalyst.
3：List of Experimental Equipment and Materials:
SEM (FEI NOVA NANOSEM 230), TEM (JEOL JEM-200CX), EDX (Bruker XFlash 430-M), XPS (Thermo Scientific K-Alpha), Raman system (JOBIN YVON HR800), XRD (Bruker D8), PL system with a He-Cd laser.
4：Experimental Procedures and Operational Workflow:
The growth process involved keeping the source material at 950 oC, using N2 and N2O as carrier gas and O source, respectively. Back-gate FETs of single nanowire were fabricated by standard photolithography.
5：Data Analysis Methods:
The carrier concentration in Sb-doped ZnO nanowire was estimated using the threshold voltage obtained from the transconductance.
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EDX
XFlash 430-M
Bruker
Analysis of compositional properties of Sb-doped ZnO nanowires.
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XPS
K-Alpha
Thermo Scientific
Analysis of compositional properties and chemical configuration of elements in Sb-doped ZnO nanowires.
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XRD
D8
Bruker
Investigation of crystallinity properties of Sb-doped ZnO nanowires.
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SEM
NOVA NANOSEM 230
FEI
Characterization of morphology and crystallographic nature of Sb-doped ZnO nanowires.
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TEM
JEM-200CX
JEOL
Characterization of crystallographic nature of Sb-doped ZnO nanowires.
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Raman system
HR800
JOBIN YVON
Investigation of vibrational properties of Sb-doped ZnO nanowires.
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PL system
Examination of optical characterization of Sb-doped ZnO nanowires.
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