Realizing intense deep-far-red broadband emission derived from mica ceramics through isomorphic cation substitution/doping for plant cultivation lighting and latent fingerprint identification

作者：Mengrou Jiang, Na Qi, Yufeng Mao, Ji Zhou, Lianshe Fu, Shikao Shi · 发表于：Journal of Advanced Ceramics · 年份：2026 · DOI：10.26599/jac.2026.9221254 · 被引用次数：3 · 研究领域：Luminescence Properties of Advanced Materials、Carbon and Quantum Dots Applications、Advanced Photocatalysis Techniques

The exploration of transition metal Mn 2+ activated luminescent materials is gaining increasing interests due to their diverse uses. Herein, the Mn 2+ -incorporated fluorphlogopite (KMg 3 AlSi 3 O 10 F 2 ) mica ceramics were successfully prepared by a high-temperature solid state reaction process, in which Mn 2+ occupied Mg 2+ site through the isomorphic substitution. The fluorphlogopite itself and derived Mn-mica (KMg 2.5 Mn 0.5 AlSi 3 O 10 F 2 ) possess negligible luminescence under ultraviolet (UV) excitation. However, the doping of rare earth Eu 2+ into Mn-mica generates an evident deep-far-red broadband emission around 620–860 nm peaking at 720 nm as excited with 240~360 nm, which is ascribed to the intrinsic 4 T 1 → 6 A 1 transition of Mn 2+ , and the maximum spectral enhancement reaches about 22-fold as excited with 320 nm. The more dramatic thing is that Na + complete substitution for K + in Mn-mica (NaMg 2.5 Mn 0.5 AlSi 3 O 10 F 2 ), not only results in the enlarged excitation range towards near-UV region, but also extremely enhances the deep-far-red emission (more than 12-fold) under 365 nm excitation. After optimization, the luminescence internal quantum yield is 87.4% and the emission intensity at 423 K retains 78% of that at ambient temperature, manifesting the modified mica ceramics with superior luminescence and thermal stability through the cooperative effects of isomorphic cation substitution and doping, which is applicable for plant cultivation ...