Sensitive mechanoluminescence from Eu2+, Tm3+ co-doped Sr3Al2O5Cl2 phosphors

Principles, properties, and sensing applications of mechanoluminescence materials

“…Meng et al took Sr 3 Al 2 O 5 Cl 2 : Eu 2+ as the research model to regulate the trap concentration and depth of the sample by controlling the doping concentration of Tm 3+ . 90 The ML spectra of Sr 2.935 Al 2 O 5 Cl 2 : 0.015Eu 2+ , 0.05Tm 3+ samples are similar to their afterglow emission spectra, both of which peak around 610 nm in Fig. 10(a).…”

Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

“…In short, the water‐splitting problem of S 3 A 2 O 6 can be addressed. Sr 3 Al 2 O 5 Cl 2 :Ln 3+/2+[ 9 , 88 ] …”

“…2) Sr 3 Al 2 O 5 Cl 2 :Ln 3+/2+ [9,88] Tang et al reported that Sr 3 Al 2 O 5 Cl 2 :Eu 2+ has a peak in the orange broadband PL at 620 nm. [29] Wang and co-workers induced deep traps by codoping 3% Tm 3+ and 1.5% Eu 2+ , which resulted in a much longer afterglow time (≈220 min).…”

“…[29] Wang and co-workers induced deep traps by codoping 3% Tm 3+ and 1.5% Eu 2+ , which resulted in a much longer afterglow time (≈220 min). [30] Fu and co-workers found that the ML properties are optimized when codoped with 1.5% Eu 2+ and 5% Tm 3+ , and a suitable Tm 3+ concentration (5%) provided deep traps for achieving stable ML performance for a long time even under a load of 10-800 N. [88] Nonpiezoelectric (highly symmetric crystals) broad-spectrum ML was observed for Sr 3 Al 2 O 5 Cl 2 :Ln (Ln = Eu 2+ , Tb 3+ , Ce 3+ ) with a spectrum covering blue to orange-red light (Figure 26a-i), and this ML has a unique temperature-modulated self-recovery activity (up to 40% recovery after 30 h at room temperature, 125 °C for 5 min) and good thermal stability. [9] In addition, the ML of this material is highly dependent on the substrate material.…”

Trap-regulated highly efficient mechanoluminescence and persistent mechanoluminescence of Ca2MgSi2O7:Eu2+

“…[11][12][13][14] With their unique ability to directly convert mechanical energy into light energy, mechanoluminescent materials show widespread applications in stress sensors, smart displays, advanced anti-counterfeiting, crack detectors, and intelligent wearable devices. [15][16][17][18][19][20][21][22][23][24][25][26] During recent years, increasing numbers of mechanoluminescent materials with excellent performance have been developed, such as ZnS:Cu, ZnS:Mn 2+ , 27 CaZnOS:Mn 2+ , 28 and SrAl 2 O 4 :Eu 2+ . 29 These mechanoluminescent materials can be used for mechanical sensing to achieve mechanical-distribution imaging and nondestructive stress detection in various fields.…”