It has been shown experimentally that light sources can be produced from commercial blue LEDs and two narrow-band nanocrystalline phosphors (CsPbBr3 and CdSe/CdZnS) that simultaneously satisfy the following criteria: the emission spectrum maximum corresponds to the peak of human vision sensitivity at night (505 nm); the color coordinates in the CIE 1931 standard are close to the point [0.33; 0.33]; the correlated color temperature CCT ~ 6000 K with the possibility of moving to warmer light with CCT ~ 4500 K; and the full range of possible colors (gamut) exceeds the norms of the HDTV standard, approaching the UHDTV standard. It is noted that for serious progress in the development of lighting sources adapted to human night and twilight vision, metrological standards and corrected units of brightness and luminous intensity must be developed while refusing to use the color rendering index for night and twilight lighting.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 90, No. 1, pp. 61–66, January–February, 2023.https://doi.org/10.47612/0514-7506-2023-90-1-61-66.
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Patsinko, O.I., Ramanenka, A.A., Krukov, V.V. et al. Phosphor Based on CsPbBr3 and CdSe/CdZnS Nanocrystals Adapted to Human Twilight Vision. J Appl Spectrosc 90, 54–59 (2023). https://doi.org/10.1007/s10812-023-01502-0
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DOI: https://doi.org/10.1007/s10812-023-01502-0