Infrared interceded YF3: Er3+/Yb3+ upconversion phosphor for crime scene and anti-counterfeiting applications

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Kumar, A (Autor) Outra; Tiwari, SP (Autor) Outra; Swart, HC (Autor) Outra; Joaquim C G E Esteves da Silva (Autor) FCUP

Revista

Título: Optical Materials

Vol. 92

Páginas: 347-351

ISSN: 0925-3467

Editora: Elsevier

Indexação

ISI Web of Knowledge - 21 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-00Q-GKZ

DOI: 10.1016/j.optmat.2019.04.050

Abstract (EN): The co-precipitation synthesis assisted YF3: Er3+/Yb3+ upconversion nanoparticles were examined as a function of pump power which showed a tuneable emission efficiency through 976 nm diode laser excitation. Different emission bands in the visible range corresponding to the F-4(7/2) -> I-4(15/2) (490 nm), H-2(11/2) -> I-4(15/2) (522 nm), S-4(3/ 2) -> I-4(15/2) (548 nm) and F-4(9/2) -> I-4(15/2) (659 nm) transitions were observed. The sample crystal structure, particle morphology and optical properties were characterized. The applications of the present sample in latent fingermarks detection and security ink demonstration were successfully examined through the optimized annealing temperature and pump power of excitation. This demonstration claimed the highly utilization of the YF3:Er3+/Yb3+ upconversion nanoparticles for possible crime scene and anti-counterfeiting practitioners.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5