An Advanced Tunable Multimodal Luminescent La4GeO8: Eu2+, Er3+ Phosphor for Multicolor Anticounterfeiting

The development of advanced luminescent materials is of great importance to the anticounterfeiting application and still confronts with lots of challenges. At present, most anticounterfeiting luminescent materials are based on a monotonous photoluminescence model, which is easily faked by substitute...

Full description

Saved in:
Bibliographic Details
Published in:Advanced functional materials 2021-08, Vol.31 (31), p.n/a
Main Authors: Pei, Pengxiang, Wei, Ruiping, Wang, Binbin, Su, Junxia, Zhang, Zhichao, Liu, Weisheng
Format: Article
Language:English
Subjects:
anticounterfeiting
Counterfeit
downconversion
Europium
Materials science
multicolor
multimodal
Phosphors
Photoluminescence
RE‐doped
upconversion
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The development of advanced luminescent materials is of great importance to the anticounterfeiting application and still confronts with lots of challenges. At present, most anticounterfeiting luminescent materials are based on a monotonous photoluminescence model, which is easily faked by substitutes. Therefore, in this work, a multimodal La4GeO8: Eu2+, Er3+ material is reported, which can emit red, purple, baby blue, and green light under the increased excitation wavelength from 250 to 380 nm. Meanwhile, the phosphor also shows green upconversion luminescence under the NIR (980 and 808 nm) laser irradiation. Moreover, the phosphor features excellent stability and humidity resistance against harsh conditions. Based on the integrated feature, a functional anticounterfeiting application is designed. Results demonstrate that the multimodal luminescent feature can be easily detected by using a portable ultraviolet lamp or NIR (808 or 980 nm) laser. The unique characteristic will be complicated to counterfeit and show high‐level security in the field of advanced anticounterfeiting. An advanced Eu2+/Er3+ codoping La4GeO8 phosphor with excellent upconversion (UC) and downconversion performances, which can emit red, purple, baby blue, and green light under the increased excitation wavelength from 250 to 380 nm, shows UC photoluminescence under the irradiation NIR laser (980 and 808 nm). Based on the integrated feature, its excellent optical properties can be used in anticounterfeiting.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202102479