Xin Guo’s research while affiliated with South China Normal University and other places

... It can be seen that with increasing electric field intensity, the quantum efficiency of the nanopillars initially increases and then decreases. The inflection points for the three types of nanopillars differ due to the presence of built-in electric fields in heterojunction nanopillars [22,34]. Furthermore, S2 NPAs exhibit the highest QE, while S3 has the lowest QE. ...

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Photoelectric response of the variable component GaxIn1−xAsySb1−y nanopillar arrays under the gradient electric field

... As major semiconductor materials used in photoelectric devices, the calculation of the photoelectric properties is the next focus on research which is the key to improve the character of devices (Alonso-Orts et al. 2023;Cao et al. 2024). For the optical conductivity, the bandgap exhibits a strong relationship to the mole fraction of each metal component as shown in Fig. 3a (Sakalauskas et al. 2011;Liu et al. 2014). ...

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Recent progress of indium-bearing group-III nitrides and devices: a review

... The core photodetector of the sun-blind UV missile alarm system mostly uses the solar-blind UV image intensifier [1,2], and the photocathodes for solar-blind UV signal detection are mainly Cs 2 Te photocathodes and AlGaN photocathodes. Compared with Cs 2 Te photocathodes, AlGaN photocathodes have the advantages of high quantum efficiency, good solar-blind characteristics, and adjustable response spectrum design [3][4][5] and are considered to be the most promising III-V group semiconductor photocathodes for realizing solar-blind UV signal photoelectric conversion [6][7][8][9][10][11]. ...

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The Time Response of a Uniformly Doped Transmission-Mode NEA AlGaN Photocathode Applied to a Solar-Blind Ultraviolet Detecting System

... They incorporated gold splitring resonators embedded within the GaAs layer. Under plane wave excitation with polarization perpendicular to the split-ring resonators' opening direction, absorption exceeded 99% at 1360 nm [15]. Murata et al. utilized rhenium(I) complexes to explore and develop stable absorbers for the NIR region [16]. ...

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An Ultra-Wideband Metamaterial Absorber Ranging from Near-Infrared to Mid-Infrared

... Therefore, it is necessary to utilize a detector with high sensitivity response that can be matched with a blue-green laser. Low-light-level vacuum detectors have the capability of enhancing extremely weak light and possess a series of advantages such as high resolution, high sensitivity and low noise [7][8][9][10]. As the core component of the vacuum detectors, the spectral response range and quantum efficiency of photocathodes directly affect the detection effect. ...

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Enhanced blue-green response of nanoarray AlGaAs photocathodes for underwater low-light detection

... There are rarely studied about relatively thick single-phase In x Ga 1-x N films [5,6]. In x Ga 1-x N alloys have garnered significant interest for their potential utilization in solar cells, nanowire array photocathodes, and high-efficiency light-emitting diodes (LEDs) [7][8][9][10][11][12]. In addition, In x Ga 1-x N LEDs can be combined with perovskites for white LED [13][14][15]. ...

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Photoelectric characteristic of single-phase InxGa1-xN films with tunable bandgap through RF magnetron sputtering

... The core photodetector of the sun-blind UV missile alarm system mostly uses the solar-blind UV image intensifier [1,2], and the photocathodes for solar-blind UV signal detection are mainly Cs 2 Te photocathodes and AlGaN photocathodes. Compared with Cs 2 Te photocathodes, AlGaN photocathodes have the advantages of high quantum efficiency, good solar-blind characteristics, and adjustable response spectrum design [3][4][5] and are considered to be the most promising III-V group semiconductor photocathodes for realizing solar-blind UV signal photoelectric conversion [6][7][8][9][10][11]. ...

Reference:

The Time Response of a Uniformly Doped Transmission-Mode NEA AlGaN Photocathode Applied to a Solar-Blind Ultraviolet Detecting System

... [6] Substantial efforts have been committed to improving the gas-sensitive properties, which mainly include element doping, modification of surface precious metals, construction of heterostructures, and ultraviolet (UV)/visible light excitation. [7][8][9][10][11][12] For instance, Molavi and Sheikhi synthesized Al-doped CuO nanostructures and obtained highly sensitive carbon monoxide gas sensors. [13] Wei et al. prepared Fe 2 O 3 /ZnFe 2 O 4 heterojunction porous nanocomposites that can detect 200 ppb triethylamine with better sensing performance than pure Fe 2 O 3 spindles. ...

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Enhanced Sensitivity of ZnFe2O4 Based on Ordered Magnetic Moment Induced by Magnetic Field: A New Insight into Mechanism

... Based on this fundamental model, researchers have developed theoretical models applicable to different systems. Zhang et al. utilized a two-dimensional photoemission model and derived a tilted heterojunction nanowire array photocathode with a quantum efficiency of 81.2% at the critical incidence angle [27,28]. Similarly, Xia et al. investigated the quantum efficiency of a nano-array photocathode when exposed to varying incident photon energies by combining the two-dimensional continuity equation for semiconductors with the finite difference method. ...

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Quantitative study on the photoemission of AlGaN nanoarrays based on the three-dimensional transportation within a four-step process

... The nanoarray structure has been prepared on the surface of GaAs photocathode, which effectively improved the light absorption of specific wavelength [28], but there are few researches on enhancing blue-green response of AlGaAs photocathode through nanostructure. In our previous work [29], the quadrangular prism or cylinder nanostructured surface of AlGaAs photocathode was designed for improving the optical absorption at 532 nm. The effects of the height of nanostructure and the angle of incident light on optical absorption were simulated. ...

Reference:

Enhanced blue-green response of nanoarray AlGaAs photocathodes for underwater low-light detection