ItemArticle

CaSi2O5:Sm3+ Orange -Red Emitting Phosphors for Latent Fingerprint Detection Application

Title
CaSi2O5:Sm3+ Orange -Red Emitting Phosphors for Latent Fingerprint Detection Application
Creator
Pathak, Pranjal; Saji, Janita; Verma, Durga; Sharma, Brijlata; Mishra, Anup; Dubey, Vikas
Description
Orange-red emitting CaSi2O5:xSm3+ (x = 0.1, 0.2, 0.5, 1, 1.5, 2, and 2.5mol% of Sm3+) phosphors were synthesized by a high-temperature solid-state reaction. In this study, the crystal structure, phase purity, functional group presence, and their bending and stretching vibrations, photoluminescence (PL) spectra, thermoluminescence (TL) spectra, and colour purity was systematically investigated. The phosphor exhibits a strong excitation with the charge transfer band (CTB) of O2? and Sm3+ at 263nm. Under 263nm excitation, the CaSi2O5:Sm3+ phosphor shows characteristic peaks at 595nm and 629nm, which are attributed to the characteristic 4G5/2?6H7/2 and 4G5/2?6H9/2 transitions of the Sm3+ ions, respectively. The doping concentration x = 2mol% is found to be the optimal doping concentration. The CIE coordinates of the optimal concentration phosphor CaSi2O5:2Sm3+ are found to be (0.589, 0.41) in the orange-red region with a colour purity percentage of 96.93%. Judd-Ofelt analysis was also carried out with the photoluminescence emission spectrum, in order to investigate the transition dynamics. Fingerprints were developed on non-porous glass and aluminium foil substrates. The experimental results display that the CaSi2O5:xSm3+ phosphors have a huge potential for practical applications. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
Source
Journal of Fluorescence;Volume;36;Issue;1;pp.203-222
Date
01-01-2026
Publisher
Springer
Coverage
Pathak P., Department of Physics, North-Eastern Hill University Shillong, Meghalaya, 793022, India; Saji J., Department of Sciences and Humanities, School of Engineering and Technology, CHRIST University, Bengaluru, 560074, India; Verma D., Department of Physics, Govt. V.Y.T.PG. Auto. College Durg, Chhattisgarh, 491001, India; Sharma B., Department of Physics, Govt. V.Y.T.PG. Auto. College Durg, Chhattisgarh, 491001, India; Mishra A., Department of Electrical and Electronics Engineering, Bhilai Institute of Technology Durg, Chhattisgarh, 491001, India; Dubey V., Department of Physics, North-Eastern Hill University Shillong, Meghalaya, 793022, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 10530509; CODEN: JOFLE
Format
online
Language
English
Type
Article

Citation

Pathak, Pranjal; Saji, Janita; Verma, Durga; Sharma, Brijlata; Mishra, Anup; Dubey, Vikas, “CaSi2O5:Sm3+ Orange -Red Emitting Phosphors for Latent Fingerprint Detection Application,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/21909.

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