Graphene quantum dots-wrapped vertically aligned zinc oxide nanorods arrays for photosensing application

Vertically aligned zinc oxide nanorods were grown on low and high temperature deposited aluminium doped zinc oxide seed layer by hydrothermal method and annealed to improve crystallinity. The morphology of the seed layer and the grown nanorods were studied by field emission scanning electron microscopy characterization technique. The properties of the zinc oxide nanorods were analyzed using laser spectroscopic studies. Resonant Raman spectroscopy reveals the unique increase in the A1(LO) mode of vibration with increase in count. The luminescence property of the nanorods was studied with photoluminescence spectrometer. The vertically aligned zinc oxide nanorods show, the very high band edge emission in the ultraviolet region of the electromagnetic spectrum. DOI: 10.21883/FTP.2017.12.45186.8562

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Enhanced Photocatalytic Activity of Vertically-Aligned Transition Metal-Doped Zinc Oxide Nanorods Synthesized by a Facile Electrochemical Method

International Journal of Electrochemical Science ◽

10.20964/2020.11.61 ◽

2020 ◽

pp. 10731-10744

Author(s):

Shaochun Yuan ◽

Keyword(s):

Zinc Oxide ◽

Photocatalytic Activity ◽

Transition Metal ◽

Electrochemical Method ◽

Zinc Oxide Nanorods ◽

Oxide Nanorods ◽

Vertically Aligned ◽

Metal Doped

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Morphological and spectroscopic studies on the vertically aligned zinc oxide nanorods grown on low and high temperature deposited seed layer

Semiconductors ◽

10.1134/s1063782617120168 ◽

2017 ◽

Vol 51 (12) ◽

pp. 1634-1640

Author(s):

A. Rayerfrancis ◽

Bhargav P. Balaji ◽

N. Ahmed ◽

C. Balaji

Keyword(s):

Zinc Oxide ◽

High Temperature ◽

Seed Layer ◽

Spectroscopic Studies ◽

Zinc Oxide Nanorods ◽

Oxide Nanorods ◽

Vertically Aligned

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High performance CsPbBr3 quantum dots photodetectors by using zinc oxide nanorods arrays as an electron-transport layer

Applied Physics Letters ◽

10.1063/5.0005464 ◽

2020 ◽

Vol 116 (16) ◽

pp. 162103 ◽

Cited By ~ 21

Author(s):

Huaxin Wang ◽

Pengfei Zhang ◽

Zhigang Zang

Keyword(s):

Quantum Dots ◽

Zinc Oxide ◽

Electron Transport ◽

High Performance ◽

Transport Layer ◽

Zinc Oxide Nanorods ◽

Electron Transport Layer ◽

Oxide Nanorods ◽

Cspbbr3 Quantum Dots

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Improved Sensitization of Zinc Oxide Nanorods by Cadmium Telluride Quantum Dots through Charge Induced Hydrophilic Surface Generation

Journal of Nanomaterials ◽

10.1155/2014/919163 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 4

Author(s):

Karthik Laxman ◽

Tanujjal Bora ◽

Salim H. Al-Harthi ◽

Joydeep Dutta

Keyword(s):

Quantum Dots ◽

Zinc Oxide ◽

Charge Transfer ◽

Cadmium Telluride ◽

Active Sites ◽

Surface Defects ◽

Transfer Efficiency ◽

Zinc Oxide Nanorods ◽

Surface Generation ◽

Oxide Nanorods

This paper reports on UV-mediated enhancement in the sensitization of semiconductor quantum dots (QDs) on zinc oxide (ZnO) nanorods, improving the charge transfer efficiency across the QD-ZnO interface. The improvement was primarily due to the reduction in the interfacial resistance achieved via the incorporation of UV light induced surface defects on zinc oxide nanorods. The photoinduced defects were characterized by XPS, FTIR, and water contact angle measurements, which demonstrated an increase in the surface defects (oxygen vacancies) in the ZnO crystal, leading to an increase in the active sites available for the QD attachment. As a proof of concept, a model cadmium telluride (CdTe) QD solar cell was fabricated using the defect engineered ZnO photoelectrodes, which showed ∼10% increase in photovoltage and ∼66% improvement in the photocurrent compared to the defect-free photoelectrodes. The improvement in the photocurrent was mainly attributed to the enhancement in the charge transfer efficiency across the defect rich QD-ZnO interface, which was indicated by the higher quenching of the CdTe QD photoluminescence upon sensitization.

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