ZnO nanorods array as light absorption antenna for high-gain UV photodetectors

Zheng, Haorong; Jiang, Yurong; Yang, Shengyi; Yong, Zhang; Yan, Xuefeng; Hu, Jinming; Shi, Yuansheng; Zou, B. S.

doi:10.1016/j.jallcom.2019.152158

Cited by 55 publications

(12 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The excellent properties of ZnO—mainly optical, luminescent, catalytic, and electrical—allow its use in thin film transistors, photodetectors, light-emitting diodes, solar cells, sensors, etc. [ 2 , 3 ]. Moreover, due to its good biocompatibility, low cytotoxicity, high surface to volume ratio with enhanced surface reactivity, and antistatic, antimicrobial, antibacterial, and antifungal properties, ZnO found broad application in biomedicine as a drug carrier, a biomarker for cell labelling, a biosensor, and an antibacterial agent [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

View full text Add to dashboard Cite

In this study, GNF@ZnO composites (gelatin nanofibers (GNF) with zinc oxide (ZnO) nanoparticles (NPs)) as a novel antibacterial agent were obtained using a wet chemistry approach. The physicochemical characterization of ZnO nanoparticles (NPs) and GNF@ZnO composites, as well as the evaluation of their antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus pumilus) and Gram-negative (Escherichia coli and Pseudomonas fluorescens) bacteria were performed. ZnO NPs were synthesized using a facile sol-gel approach. Gelatin nanofibers (GNF) were obtained by an electrospinning technique. GNF@ZnO composites were obtained by adding previously produced GNF into a Zn2+ methanol solution during ZnO NPs synthesis. Crystal structure, phase, and elemental compositions, morphology, as well as photoluminescent properties of pristine ZnO NPs, pristine GNF, and GNF@ZnO composites were characterized using powder X-ray diffraction (XRD), FTIR analysis, transmission and scanning electron microscopies (TEM/SEM), and photoluminescence spectroscopy. SEM, EDX, as well as FTIR analyses, confirmed the adsorption of ZnO NPs on the GNF surface. The pristine ZnO NPs were highly crystalline and monodispersed with a size of approximately 7 nm and had a high surface area (83 m2/g). The thickness of the pristine gelatin nanofiber was around 1 µm. The antibacterial properties of GNF@ZnO composites were investigated by a disk diffusion assay on agar plates. Results show that both pristine ZnO NPs and their GNF-based composites have the strongest antibacterial properties against Pseudomonas fluorescence and Staphylococcus aureus, with the zone of inhibition above 10 mm. Right behind them is Escherichia coli with slightly less inhibition of bacterial growth. These properties of GNF@ZnO composites suggest their suitability for a range of antimicrobial uses, such as in the food industry or in biomedical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…4e ), which is lower than pure ZnO (3.37 eV) at room temperature, and the reason is that the defect density increases with the increasing specific surface area, leading to the formation of defect levels in the band gap of ZnO. 55 …”

Section: Resultsmentioning

confidence: 95%

“…4e), which is lower than pure ZnO (3.37 eV) at room temperature, and the reason is that the defect density increases with the increasing specic surface area, leading to the formation of defect levels in the band gap of ZnO. 55 In order to fabricate high-performance, low-cost and selfpowered photodetectors and avoid the electrical potentialinduced reaction of gold with the thiocyanate anions, 29 rGO was then drop-coated on the CuSCN layer. The adsorption energy of the molecular adsorbates on the CuSCN surfaces is dependent on the lm orientation.…”

Section: Resultsmentioning

confidence: 99%

Enhanced performance of ZnO nanorod array/CuSCN ultraviolet photodetectors with functionalized graphene layers

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, some 1D nanomaterials, such as SiC, NiO, ZnSe, AlGaN, and ZnO, have become commercially available [5]. Among them, ZnO is one of the essential wide-bandgap semiconductors, with a direct bandgap of 3.37 eV and excitation binding energy of 60 meV at room temperature, as well as a non-centrosymmetric crystal structure [6]. On account of its unique properties such as environmental friendliness, abundant raw materials, and chemical stability, ZnO has been considered as a promising photoelectronic material [7].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Spectral Response of ZnO-Nanorod-Array-Based Ultraviolet Photodetectors by Alloying Non-Isovalent Cu–O with CuAlO2 P-Type Layer

et al. 2023

View full text Add to dashboard Cite

CuAlO2 was synthesized by a hydrothermal method, in which the Cu–O dimers were incorporated by simply altering the ratio of the reactants and the temperature. The incorporation process increases the grain size in CuAlO2, and modulates the work function and binding energies for CuAlO2 due to the partial substitution of Cu+ 3d10 with Cu2+ 3d9 orbitals in the valence band maximum by alloying non-isovalent Cu–O with a CuAlO2 host. Based on the ZnO nanorod arrays (NRs) ultraviolet photodetector, CuAlO2/Cu–O fabricated by the low-cost drop-coating method was used as the p-type hole transport layer. The incorporation of the Cu–O clusters into CuAlO2 lattice to enhance the conductivity of CuAlO2 is an effective way for improving ZnO NRs/CuAlO2 device performance. The photodetectors exhibit significant diode behavior, with a rectification ratio approaching 30 at ±1 V, and a dark saturation current density 0.81 mA cm−2. The responsivity of the ZnO-NRs-based UV photodetector increases from 13.2 to 91.3 mA/W at 0 V bias, with an increase in the detectivity from 2.35 × 1010 to 1.71 × 1011 Jones. Furthermore, the ZnO NRs/[CuAlO2/Cu–O] photodetector exhibits a maximum responsivity of 5002 mA/W at 1.5 V bias under 375 nm UV illumination.

show abstract

ZnO nanorods array as light absorption antenna for high-gain UV photodetectors

Cited by 55 publications

References 38 publications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Enhanced performance of ZnO nanorod array/CuSCN ultraviolet photodetectors with functionalized graphene layers

Enhanced Spectral Response of ZnO-Nanorod-Array-Based Ultraviolet Photodetectors by Alloying Non-Isovalent Cu–O with CuAlO2 P-Type Layer

Contact Info

Product

Resources

About