The light-induced pyro-phototronic effect improving a ZnO/NiO/Si heterojunction photodetector for selectively detecting ultraviolet or visible illumination
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Abstract:
In this work, we fabricate a ZnO/NiO/Si heterojunction photodetector, which successfully realizes selective detection of UV or visible light in a single photodetector.Keywords:
Non-blocking I/O
Ultraviolet
Visible spectrum
Ultraviolet light
Background: Visual perception has hindered the development of blinded, placebo‐controlled ultraviolet light exposure conditions in humans. New acrylic thermoplastics that block or transmit ultraviolet light have visual properties that may provide a solution. Methods: In a series of triangle taste tests, 60 subjects were tested for the ability to visually perceive ultraviolet light transmission by two of four types of acrylic thermoplastics. Results: Forty‐six of sixty (67%) subjects were unable to visually detect ultraviolet light transmitting acrylics among ultraviolet blocking acrylics in both an ambient light background condition and an ambient light background condition with ultraviolet A light supplementation. Conclusion: Acrylic thermoplastics allow for the production of blinded, placebo‐controlled ultraviolet light exposure conditions by eliminating visual discrimination differences between active and control groups.
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Ultraviolet light
Acrylic resin
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An ultraviolet array photodetector is developed by the application of a LiNbO3-based slanted finger interdigital transducer (SFIT) and several ZnO optically active areas. This array photodetector can obtain ultraviolet light intensities within a single measurement. In this analysis, the acoustoelectric interaction between the photogenerated carriers in several active areas and a SFIT surface acoustic wave device is simulated. In the experiment, the photodetector with one to three optically active areas are fabricated. Ultraviolet light with a wavelength of 380 nm and an intensity of 65 μW cm−2 is detectable from the photodetector developed in this study. The minimum size of the optically active areas is 0.04 mm2 that can provide good spatial resolution. The ultraviolet array photodetector is capable of measuring a distributed light field.
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Ultraviolet light
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Ultraviolet
Ultraviolet light
Ultraviolet irradiation
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Photoconductivity
Ultraviolet
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We present a highly transparent heterojunction photodiode by precisely aligning n-type SnO2 nanobelts on top of a p-type NiO thin film. This p-n junction diode demonstrates stable rectifying characteristics as well as greatly enhanced ultraviolet photoresponse, which exhibits an ultrahigh photosensitivity of up to 10(5) with accelerated response speed under reverse bias.
Non-blocking I/O
Ultraviolet
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Photodiode
p–n junction
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Certain types of ultraviolet (UV) light are strongly carcinogenic. Yet complete avoidance of exposure is almost impossible. Further, ultraviolet light is indispensable, permitting the skin to synthesize vitamin D, complementing that derived from dietary sources.
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Ultraviolet a
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Fish can see not only the visible rays of light for human being but also the ultraviolet rays. However, the effects of the ultraviolet rays on the fish behavior have not been investigated. It is known that the reaction of fish against the reflected light and transmitted light is different irrespective of the same species. In this study, the effects of the reflected ultraviolet light and transmitted ultraviolet light on the fish behavior were investigated experimentally. It was found that the reflected ultraviolet light by the side and bed wall has no effect on the fish behavior. In contrast, the ayu swims under the irradiated area of ultraviolet light by choice.
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Near ultraviolet
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Natural plant ultraviolet absorbent is a safe cosmetic-typed ultraviolet additive, with no side-effect and bright future. Natural plant ultraviolet absorbent is ground from ultraviolet absorbing plant into organic solvent under dry-vacuum condition. This new type of ultraviolet absorbent has brown colour in solid form, but when it mixes with alcohol and water, its colour changes to light yellow in liquid form. This paper focuses mainly on using ultraviolet/visible spectrometer to examine its spectral properties under ultraviolet light. The result shows that this absorbent has a relative transmittance below 0.2% in the UVC and UVB zones, while in the UVA zone around 375 nm, the value raises up only to 2.1%. This concludes that the natural plant ultraviolet absorbent has a high absorbing ability under ultraviolet light and can withstand ultraviolet light with long wavelength.
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Ultraviolet light
Ultraviolet a
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Ultraviolet
Ultraviolet light
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