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Research Article
lihua Li
Henan University of Science and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0003-4946-6058
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This work is licensed under a CC BY 4.0 License. Read Full License
ZnO nanoarray were synthesized by hydrothermal method on Co2+-doped Zn1-xCoxO (x（mol%）=0.00, 0.01, 0.02, 0.03, 0.04, 0.05) seed layers pre-coated on ITO substrate. The effects of different Co2+ doping concentrations on morphology and photoelectric properties of ZnO nanoarray including transient photo-current and charge transfer resistance were investigated. The addition of Co2+ in the seed layer could perfect the oriented growth of ZnO nanoarray and apparently enhance its photo current. FESEM observation confirmed that the ZnO nanoarray were grown in the way perpendicular to ITO substrate along the direction of (002). Meanwhile, UV-vis tests shown that the band gap energy was decreased from 3.37 eV to 3.16 eV due to Co2+ doping and the ZnO nanoarray had a strong visible region in the range 400-650 nm. The transient photo-current was found to vary from 0.005 to 0.15 mA/cm2 under AM 1.5G simulated sunlight illumination. Photoelectric properties was correlated with the recombination of photo-generated charge carriers, which was inhibited with optimal Co2+ doping concentrations and was beneficial for application in perovskite solar cells.
Keywords
Co2+ doping, ZnO nanoarray, optical, UV-vis absorption, photoelectric properties
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This is a preprint. It has not completed peer review.
Research Article
lihua Li
Henan University of Science and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0003-4946-6058
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 03 Mar, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
ZnO nanoarray were synthesized by hydrothermal method on Co2+-doped Zn1-xCoxO (x（mol%）=0.00, 0.01, 0.02, 0.03, 0.04, 0.05) seed layers pre-coated on ITO substrate. The effects of different Co2+ doping concentrations on morphology and photoelectric properties of ZnO nanoarray including transient photo-current and charge transfer resistance were investigated. The addition of Co2+ in the seed layer could perfect the oriented growth of ZnO nanoarray and apparently enhance its photo current. FESEM observation confirmed that the ZnO nanoarray were grown in the way perpendicular to ITO substrate along the direction of (002). Meanwhile, UV-vis tests shown that the band gap energy was decreased from 3.37 eV to 3.16 eV due to Co2+ doping and the ZnO nanoarray had a strong visible region in the range 400-650 nm. The transient photo-current was found to vary from 0.005 to 0.15 mA/cm2 under AM 1.5G simulated sunlight illumination. Photoelectric properties was correlated with the recombination of photo-generated charge carriers, which was inhibited with optimal Co2+ doping concentrations and was beneficial for application in perovskite solar cells.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
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