Growth of Ga$_{\bm 2}$O $_{\bm 3}$ Nanowires and the Fabrication of Solar-Blind Photodetector

Weng, W. Y.; Hsueh, Ting-Jen; Chang, Shoou‐Jinn; Huang, G. J.; Hung, Shang-Chao

doi:10.1109/tnano.2011.2104366

Cited by 42 publications

(23 citation statements)

References 28 publications

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“…Comparing the resulting R s obtained in this work with those reported in the literature for other oxides used in this application: (In x Ga 1-x ) 2 O 3 (R s = 6.9 X 10 −5 AW −1 ) and -Ga 2 O 3 (R s = 3.72 X 10 −4 AW −1 ), the potential use of DyCoO 3 as UV photodetector material can be noticed [34,35].…”

Section: Responsivity Ofsupporting

confidence: 64%

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

et al. 2019

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Oxides with the perovskite type structure of formula LnCoO 3 , where Ln is a rare earth element, have unique physical and chemical properties. These materials are applied in catalysis, gas sensors, and electrodes for solid oxide fuel cells, among others. In this work, single-phase DyCoO 3 was obtained at 900 ∘ C using the solution-polymerization method. The microstructure of this material corresponds to a dendritic-type shape, with grain size between 0.2 and 8 m and abundant porosity. The ultraviolet (UV) sensing characterization was performed on sintered pellets made with the as-prepared DyCoO 3 powder. The UV source was a light emitting diode (LED) of wavelength ( ) of 365 nm. The detection of this radiation, with constant optical irradiance (E e ), produced uniform and reproducible response patterns. When E e was increased, the graphs revealed a quantitative detection of the light. Analogous results were obtained using light of larger wavelengths: = 400, 449, and 642 nm. The graphs display a decrease on the variation of the photocurrent by increasing , corresponding to a decrease on the energy of the incoming photons. On the other hand, the photocatalytic decomposition of malachite green under UV radiation was investigated using powder of DyCoO 3 . The results show a decrease of the absorbance by increasing the UV exposure time, indicating the degradation of the dye. Since DyCoO 3 is a p-type semiconductor material, the generation of electrical charge carriers under UV radiation explains its photocurrent and photocatalytic properties. In general, these properties can be applied in UV sensors to prevent skin cancer, photoconductive materials for solar photocells, and photocatalysis to decompose organic dyes.

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Section: Responsivity Ofsupporting

confidence: 64%

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

et al. 2019

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“…Individual β -Ga 2 O 3 nanostructures such as nanobelts and nanowires, have been demonstrated by several reports to be potential solar-blind UV photodetectors [115–120]. The first individual β -Ga 2 O 3 was reported in 2006 by Feng et al .…”

Section: Semiconductor Thin-film Uv Photodetectormentioning

confidence: 99%

A Comprehensive Review of Semiconductor Ultraviolet Photodetectors: From Thin Film to One-Dimensional Nanostructures

Sang

Liao

Sumiya

2013

Sensors

723

435

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Ultraviolet (UV) photodetectors have drawn extensive attention owing to their applications in industrial, environmental and even biological fields. Compared to UV-enhanced Si photodetectors, a new generation of wide bandgap semiconductors, such as (Al, In) GaN, diamond, and SiC, have the advantages of high responsivity, high thermal stability, robust radiation hardness and high response speed. On the other hand, one-dimensional (1D) nanostructure semiconductors with a wide bandgap, such as β-Ga2O3, GaN, ZnO, or other metal-oxide nanostructures, also show their potential for high-efficiency UV photodetection. In some cases such as flame detection, high-temperature thermally stable detectors with high performance are required. This article provides a comprehensive review on the state-of-the-art research activities in the UV photodetection field, including not only semiconductor thin films, but also 1D nanostructured materials, which are attracting more and more attention in the detection field. A special focus is given on the thermal stability of the developed devices, which is one of the key characteristics for the real applications.

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“…Hence, the probability of blue-shift effect was positive during Ga 2 O 3 doping in the ZnO structures. The result also suggested that the fabricated GZO nanosheet UV PD was solar blind [20]. The responsivity of the fabricated PD was 2.83×10 −5 A/W at an incident light wavelength of 340 nm and an applied bias voltage of 1 V. The UV-to-visible rejection ratio, defined as the responsivity measured at 340 nm divided by the responsivity measured at 460 nm, was approximately 89 for the fabricated PD at 1 V bias voltage.…”

Section: Resultsmentioning

confidence: 72%

Novel Ga-ZnO Nanosheet Structures Applied in Ultraviolet Photodetectors

Yang

Hsiao

et al. 2014

IEEE Photon. Technol. Lett.

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Vertically aligned Ga-doped ZnO (GZO) nanosheets were grown on a glass substrate using a low-temperature (90 • C) hydrothermal method. The average length and diameter of the nanosheets were ∼720 and 26 nm, respectively. The GZO nanosheets exhibited wurtzite and monoclinic structures. A metal-semiconductor-metal ultraviolet (UV) photodetector (PD) was also fabricated for the GZO nanosheets. Results revealed that the photoresponses of the GZO UV PD were flat at short wavelengths. Meanwhile, a sharp cutoff was observed at 340 nm. The UV-to-visible rejection ratio of the fabricated PD was ∼89 at 1 V bias voltage.

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Growth of Ga$_{\bm 2}$O $_{\bm 3}$ Nanowires and the Fabrication of Solar-Blind Photodetector

Cited by 42 publications

References 28 publications

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

A Comprehensive Review of Semiconductor Ultraviolet Photodetectors: From Thin Film to One-Dimensional Nanostructures

Novel Ga-ZnO Nanosheet Structures Applied in Ultraviolet Photodetectors

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Growth of Ga$_{\bm 2}$O $_{\bm 3}$ Nanowires and the Fabrication of Solar-Blind Photodetector

Cited by 42 publications

References 28 publications

Novel UV Sensing and Photocatalytic Properties of DyCoO3

Novel UV Sensing and Photocatalytic Properties of DyCoO3

A Comprehensive Review of Semiconductor Ultraviolet Photodetectors: From Thin Film to One-Dimensional Nanostructures

Novel Ga-ZnO Nanosheet Structures Applied in Ultraviolet Photodetectors

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Novel UV Sensing and Photocatalytic Properties of DyCoO₃

Novel UV Sensing and Photocatalytic Properties of DyCoO₃