Intense green elastico-mechanoluminescence from KZn(PO3)3:Tb3+

Abstract

Mechanoluminescent (ML) materials have important applications in the field of mechanical detection. To accelerate the application of ML materials, the expansion of ML materials is essential. Herein, a green ML phosphor KZn(PO3)3:Tb3+ was prepared via a high temperature solid state reaction method. Tb3+ ions occupy the Zn2+ sites, and the defects are generated due to charge compensation, which can serve as the trap center for capturing carriers and are verified by thermoluminescence (TL). The flexible structure framework of KZn(PO3)3 not only provides enough space for defects in the lattice, but also generates great strain energy when applied with forces. KZn(PO3)3:Tb3+ shows a sensitive reaction to different mechanical forces, which indicates it a potential ML material for use in intelligent sensors.

LiTaO3:Bi3+,Tb3+,Ga3+,Ge4+: A Smart Perovskite with High Charge Carrier Storage Capacity for X‐Ray Imaging, Stress Sensing, and Non‐Real‐Time Recording

“…There is an ongoing research to develop more intense and stable ML materials. During the past two decades, different inorganic compounds, like LiNbO 3 , [ 6 ] Li 1‐x Na x NbO 3 , [7] AZnOS (A = Ca, Sr, Ba), [ 8 ] (Ca 1‐x Sr x ) 8 Mg 3 Al 2 Si 7 O 28 , [ 9 ] LiGa 5 O 8 , [ 10 ] KZn(PO 3 ) 3 , [ 11 ] NaCa 2 GeO 4 F, [ 12 ] MgF 2 , [ 13 ] or RE 2 O 2 S:Ln 3+ (RE = Y, Lu, La, Gd) [ 14 ] were explored. Compared with traditional phosphors, the numbers of compounds that can show repeatable ML are still very limited.…”

Intense Mechanoluminescence in Undoped LiGa5O8 with Persistent and Recoverable Behaviors

“…According to general ML mechanisms, high energy transfer rate between the localized energy levels (LELs) and the trap levels is one of the most critical factors to achieve efficient ML in undoped materials. [ 23–25 ] LiGa 5 O 8 has an inverse spinel structure with the space group of Fd3m , which tends to form intrinsic defects during high temperature synthesis. [ 26–28 ] Such a structural characteristic is favorable to form rich trap levels and LELs in LiGa 5 O 8 , providing the possibility to produce efficient ML.…”

“…[1,2] ML materials can be directly driven by the ubiqui-ML in undoped materials. [23][24][25] LiGa 5 O 8 has an inverse spinel structure with the space group of Fd3m, which tends to form intrinsic defects during high temperature synthesis. [26][27][28] Such a structural characteristic is favorable to form rich trap levels and LELs in LiGa 5 O 8 , providing the possibility to produce efficient ML.…”

Discovering and Dissecting Mechanically Excited Luminescence of Mn2+ Activators via Matrix Microstructure Evolution

“…Therefore, the discovery-based approach mainly adopts two schemes, namely screening persistent phosphors with non-centrosymmetric structures and doping luminescent activators in piezoelectric matrices. [38][39][40][41][42][43] However, these two schemes are still far from the inverse designbased approach to obtain the required performance of ML materials. Moreover, the former one is limited by the available candidates of persistent phosphors with piezoelectricity while the latter one regularly suffers from the luminescence quenching of activators in piezoelectric.…”

“…[26][27][28][29][30][31][32][33][34][35][36] Currently, the mechanisms of ML are still under intensive exploration due to the sophisticated factors involved in the process. [17,32,38,[42][43][44][45][46][47][48] The insufficient apprehending of ML mechanisms inevitably makes it difficult to guide the ondemand design of efficient ML materials. Therefore, in order to achieve the rational design and wide application of efficient ML materials, at the current stage, it is of pivotal significance to construct ML material platforms to achieve the systematical understanding of ML mechanisms.…”