Development of red-emitting Ba2LaSbO6:Mn4+ phosphors for latent fingerprint detection. Issue 14 (15th July 2021)

• Record Type: Journal Article
• Authors: Park, Jin Young; Jang, Ki Wan; Yang, Hyun Kyoung
• Is Part Of: Ceramics international. Volume 47:Issue 14(2021)
• Page Start: 19496
• Page End: 19504
• Publication Date: 2021-07-15
• Subjects: Ba2LaSbO6 -- Mn4+ -- Latent fingerprint -- Red phosphor -- Sol-gel; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.03.287
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Latent fingerprints provide crucial affirmations of identity in forensic science. However, they are microscopic. In this study, novel fluorescence materials, Ba2 LaSbO6 :Mn 4+ (BLSO:Mn 4+ ) phosphors, were developed by a sol–gel method for the fluorescence imaging of latent fingerprints. The structural properties of the phosphors were investigated by powder X-ray diffraction (XRD) and its Rietveld refinement analyses, and transmission electron microscopy and scanning electron microscopy techniques. The photoluminescence properties of the BLSO:Mn 4+ phosphors were evaluated comprehensively by recording the emission, excitation, and decay curves. The BLSO:Mn 4+ phosphors provide a high-intensity red emission at 677 nm under 350 nm excitation caused by the 2 Eg → 4 A2g transition of Mn 4+ . The optimum concentration of Mn 4+ in the BLSO host was determined to be ~0.2 mol%. The calculated Commission International de L'Eclairage (CIE) chromaticity coordinates (0.716, 0.283) of the emission from the BLSO:Mn 4+ phosphor are located in the pure red region of the CIE 1931 diagram. The red-emitting BLSO:0.2Mn 4+ phosphor was used as a fluorescence imaging powder for visualizing latent fingerprints on various substrates with high resolution, high contrast, and high efficiency, as well as good selectivity.