Dynamic multicolor emissions of multimodal phosphors by Mn2+ trace doping in self-activated CaGa4O7

荧光粉 机械容积 发光 光致发光 兴奋剂 掺杂剂 纳米技术 阴极发光 材料科学 光电子学
作者
Yiqian Tang,Yiyu Cai,Kunpeng Dou,Jianqing Chang,Li Wei,Shanshan Wang,Mingzi Sun,Bolong Huang,Xiaofeng Liu,Jianrong Qiu,Lei Zhou,Mingmei Wu,Juncheng Zhang
出处
期刊:Nature Communications [Nature Portfolio]
卷期号:15 (1) 被引量:52
标识
DOI:10.1038/s41467-024-47431-0
摘要

Abstract The manipulation of excitation modes and resultant emission colors in luminescent materials holds pivotal importance for encrypting information in anti-counterfeiting applications. Despite considerable achievements in multimodal and multicolor luminescent materials, existing options generally suffer from static monocolor emission under fixed external stimulation, rendering them vulnerability to replication. Achieving dynamic multimodal luminescence within a single material presents a promising yet challenging solution. Here, we report the development of a phosphor exhibiting dynamic multicolor photoluminescence (PL) and photo-thermo-mechanically responsive multimodal emissions through the incorporation of trace Mn 2+ ions into a self-activated CaGa 4 O 7 host. The resulting phosphor offers adjustable emission-color changing rates, controllable via re-excitation intervals and photoexcitation powers. Additionally, it demonstrates temperature-induced color reversal and anti-thermal-quenched emission, alongside reproducible elastic mechanoluminescence (ML) characterized by high mechanical durability. Theoretical calculations elucidate electron transfer pathways dominated by intrinsic interstitial defects and vacancies for dynamic multicolor emission. Mn 2+ dopants serve a dual role in stabilizing nearby defects and introducing additional defect levels, enabling flexible multi-responsive luminescence. This developed phosphor facilitates evolutionary color/pattern displays in both temporal and spatial dimensions using readily available tools, offering significant promise for dynamic anticounterfeiting displays and multimode sensing applications.
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