@article{Jiang2026, 
author = {Mengrou Jiang and Na Qi and Yufeng Mao and Ji Zhou and Lianshe Fu and Shikao Shi},
title = {Realizing intense deep-far-red broadband emission derived from mica ceramics through isomorphic cation substitution/doping for plant cultivation lighting and latent fingerprint identification},
year = {2026},
journal = {Journal of Advanced Ceramics},
volume = {15},
number = {3},
pages = {9221254},
keywords = {mica ceramics, luminescence, transition metal Mn2+, rare earth Eu2+, isomorphic cation substitution/doping},
url = {https://www.sciopen.com/article/10.26599/JAC.2026.9221254},
doi = {10.26599/JAC.2026.9221254},
abstract = {The exploration of transition metal Mn2+-activated luminescent materials is gaining increasing interests due to their diverse uses. Herein, Mn2+-incorporated fluorphlogopite (FP; KMg3AlSi3O10F2) mica ceramics were successfully prepared by a high-temperature solid-state reaction process, in which Mn2+ occupied the Mg2+ site through isomorphic substitution. The FP itself and derived Mn-mica (KMg2.5Mn0.5AlSi3O10F2) possess negligible luminescence under ultraviolet (UV) excitation. However, the doping of rare earth Eu2+ into Mn-mica generates an evident deep-far-red broadband emission at approximately 620–860 nm, peaking at 720 nm when excited with 240–360 nm, which is ascribed to the intrinsic 4T1 → 6A1 transition of Mn2+, and the maximum spectral enhancement reaches approximately 22-fold when excited with 320 nm. The more dramatic result is that the complete substitution of Na+ for K+ in Mn-mica (NaMg2.5Mn0.5AlSi3O10F2) not only results in an enlarged excitation range toward the near-UV region but also greatly enhances the deep-far-red emission (more than 12-fold) under 365 nm excitation. After optimization, the luminescence internal quantum yield (QY) is 87.4%, and the emission intensity at 423 K retains 78% of that at ambient temperature, indicating that the modified mica ceramics have superior luminescence and thermal stability through the cooperative effects of isomorphic cation substitution and doping, which is applicable for plant cultivation lighting and latent fingerprint identification.}
}