Research of the solar-blind and visible-blind photodetectors, based on the AlGaN solid solutions

Lamkin, I. A.; Тарасов, С. А.; Petrov, A. A.; Menkovich, E A; Соломонов, А. В.; Kurin, S Yu

doi:10.1088/1742-6596/572/1/012063

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…In the modern protected crop production lighting systems, red-blue LEDs are the most high-demand light sources. First of all, this choice is justified by the ability of photosynthetic pigments to absorb light in the red and blue spectrum [1][2][3]. However, in many studies comparing the efficiency of white and red-blue LEDs, comparative results were generally observed, and for certain plant varieties and growing conditions, white LEDs showed higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

Comparative evaluation of the photosynthetic photonic efficiency of white LEDs

Smirnov

Proshkin

Burynin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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White LEDs are an effective solution for light culture due to the presence of the green emission spectrum, which has a positive effect on growing plants in the artificial environment. However, the assessment of the effectiveness of the application of the white LEDs for photoculture is complicated by the lack of information in the technical documentation for LEDs about their photosynthetic photon flux in the range of photosynthetically active radiation. In this regard, the purpose was to measure the photonic and energy characteristics of popular white LEDs in various operating modes and to evaluate their photosynthetic photonic efficiency. High-demand brands of LEDs of the rated power of 0.5W in SMD2835 and SMD3030 housing were selected to be studied. The luminous flux of LEDs was measured using a luminous flux meter using the “integrating sphere” method, and then their luminous efficiency and photosynthetic photonic efficiency were calculated. The highest photosynthetic radiation efficiency (more than 2.7 μmol s−1) was registered for LEDs of the color temperature of 4000K and 5000K in the SMD3030 housing, manufactured using flip-chip technology. LEDs of the color temperature of less than 3000K have the lowest photosynthetic photonic efficiency, which is primarily associated with the energy losses in the phosphor and the presence of radiation in the far-red spectrum region, which is not included in the region of photosynthetically active radiation. White LEDs can be used both separately and in combination with the red and blue LEDs, which will allow selecting the spectral composition of the radiation for the specific species and variety of plants.

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Section: Introductionmentioning

confidence: 99%

Comparative evaluation of the photosynthetic photonic efficiency of white LEDs

Smirnov

Proshkin

Burynin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…For the most part, this is circumvented by rejection filters. [ 2 ] Still, the development of sensing elements that are specific to the desired portion of the electromagnetic spectrum is preferable as it would simplify the device structure and reduce manufacturing costs. Hence, in the past decades, there has been a considerable effort to develop UV sensors that are blind to visible radiation (i.e., in the wavelength range of 300–700 nm).…”

Section: Introductionmentioning

confidence: 99%

Carbon Nitride Thin Film‐Sensitized Graphene Field‐Effect Transistor: A Visible‐Blind Ultraviolet Photodetector

Palanisamy

Mitra

Batra

et al. 2022

Adv Materials Inter

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Ultraviolet (UV) photodetectors often suffer from the lack of spectral selectivity due to strong interference from visible light. In this study, the exceptional electrical properties of graphene and the unique optical properties of carbon nitride thin films (CNTFs) are used to design visible‐blind UV photodetectors. First, polycrystalline CNTFs with different thicknesses (12–94 nm) are produced by thermal vapor condensation. Compared to the bulk carbon nitride powder, these films have a considerable sp2 nitrogen deficiency, which is thickness dependent. In addition to showing a wider bandgap than the bulk counterpart, their optical absorption profile (in the ultraviolet–visible range) is unique. Critically, the absorbance falls sharply above 400 nm, making the CNTFs suitable for ultraviolet photodetection. As a result, graphene field‐effect transistors (GFETs) sensitized with CNTFs show 103 A W−1 responsivity to UV radiation, a stark contrast to the negligible value obtained in the visible spectrum. The effect of film thickness on the photoresponse is determined, with the thinner CNTF leading to much better device performance. The CNTF/GFET photodetectors are also characterized by their fast response and recovery times, 0.5 and 2.0 s, respectively. These findings pave a simple route for the development of sensitive, visible‐blind UV photodetectors.

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“…Reviewing the state-of-the-art of solar blind photodetector technologies [4][5][6][7], we discovered that the claim of many novel designs of "solar blindness" is not very accurate [8][9][10][11]. While operation in the non-visible (particularly middle and far-UV) regions may obviate solar blindness as discussed in [12][13], the definition of solar blindness must imply nonresponsiveness to solar radiation under all circumstances of operation. Also, the completely solar-blind detector should have a discrimination window offering a demarcated band of accepted wavelengths, instead of a single value of threshold wavelength determining the spectral response.…”

Section: Introductionmentioning

confidence: 99%

Design of Solar Blind Photodetectors for Communication with Green Signal (λ= 0.532µm) in Space. Part II

shtein

Asthana

2020

JERR

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The areas of Free Space Optical (FSO) communication and high-speed Visible Light Communication (VLC) offer potential for very high-speed data transmission. Favorable attributes including high frequency and wider bandwidths that can enable transmission speeds of the order 100Gb/s, associated with the visible region of the electromagnetic spectrum make it preferable for allowing communication among satellites and ground stations, under-water communication, etc. However, limitations associated with spectral absorption characteristics of the propagating media have stymied further development of such technologies. Aims: Commercial lasers operating in red, green and blue lights combined with three photodetectors, each sensitive to selected wavelengths (colors) present basics of long-distance optical communication system. The current study (Part II) depicts the design and operation of a solar-blind photodetector capable to work explicitly with green wavelength of 532nm. Study Design and Results: The structure of the solar-blind photodetector consists of two sections made of InxGa1-xN (Indium Gallium Nitride) heterostructure, (where x denotes the mole fraction)-a filter and a double barrier tunneling diode. The topmost approximately 1µm thick section acts as a filter and as a p-i-n solar cell providing the required voltage bias to the photodiode. The filter with Eg (Energy Band Gap)=2.33eV absorbs all photons having wavelengths shorter than 532nm. The double barrier tunneling photodiode which comprises the lower section operates with Eg=2.28eV. It consists of an n-type lightly doped quantum well having a width of 2.5nm housed between two lightly doped barriers of 10nm thickness. The 0.12µm topmost and bottom regions of the photodiode are doped with p and n (2×105cm-3) type impurities, respectively. The illuminated cross-section area of the device is finalized at 1mm2.

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Research of the solar-blind and visible-blind photodetectors, based on the AlGaN solid solutions

Cited by 11 publications

References 7 publications

Comparative evaluation of the photosynthetic photonic efficiency of white LEDs

Comparative evaluation of the photosynthetic photonic efficiency of white LEDs

Carbon Nitride Thin Film‐Sensitized Graphene Field‐Effect Transistor: A Visible‐Blind Ultraviolet Photodetector

Design of Solar Blind Photodetectors for Communication with Green Signal (λ= 0.532µm) in Space. Part II

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