Giant Pressure‐Induced Spectral Shift in Cyan‐Emitting Eu²⁺‐Activated Sr₈Si₄O₁₂Cl₈ Microspheres for Ultrasensitive Visual Manometry

Abstract

To address the unsatisfactory pressure sensitivity of luminescent manometers, Eu2+‐activated supersensitive microspheres operating in the visible range are developed. A series of Eu2+‐doped Sr8Si4O12Cl8 materials are synthesized as microspheres, and their structural and spectroscopic properties are studied theoretically and experimentally. Excited at 350 nm, the samples emit a bright cyan luminescence at ambient conditions that, upon pressure, changes to green emission and finally to yellow light above 7 GPa. Most importantly, a huge red‐shift of the emission band from 497.3 to 568.8 nm is observed as the pressure increases, leading to an ultrahigh‐pressure sensitivity of 9.69 nm/GPa, which is the highest sensitivity ever reported. The designed microspheres with polychromatic emissions and high‐pressure sensitivity are suitable for visual optical pressure sensing, and the applied strategy provides some important guidelines for the development of new optical manometers, allowing pressure monitoring with unprecedented accuracy.

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D‐Printed Polymers

“…Advances in luminescent materials have greatly enhanced the development of science and technology. [1][2][3] Depending on the source of excitation, for example, electromagnetic radiation, stress (mechanical force), electric current or field, temperature, or magnetic field, different types of luminescence can be observed, such as photoluminescence (PL), [4,5] mechanoluminescence (ML), [6,7] electroluminescence (EL), [8,9] thermoluminescence (TL), [10] and magnetic-induced luminescence (MIL), [11] respectively. Fabricating multimode materials, with luminescence in response to various types of stimuli, multiplies vitality for applications.…”

Multicolor tunable Bi3+,Sm3+ co-doped Sr2GdGaO5 phosphor and its application in optical thermometry

“…18 To enable the application of phosphors in optical thermometry, various strategies have been developed involving the doping of two or more luminescent centers. 19–22 One widely adopted approach is the doping of luminescent materials with combinations of two ions, such as Bi 3+ /Mn 4+ , Bi 3+ /Mn 2+ , Bi 3+ /Eu 3+ , Pr 3+ /Dy 3+ , Tb 3+ /Eu 3+ , Eu 3+ /Mn 4+ , or Er 3+ /Yb 3+ . 23–29 These strategies allow for simultaneous optical temperature thermometry and color tunability.…”

Molten Salt Synthesis and Upconversion of Cubic ZrO2 Submicron Phosphors for Temperature Sensor and Anticounterfeit Applications

“…To overcome this limitation, several works have reported on many divalent and trivalent cationic species such as Mg 2+ , Ca 2+ , Eu 3+ , Er 3+ , and Y 3+ incorporated into zirconia to stabilize the cubic and tetragonal phases at room temperature. , Through rare earth doping, the materials also would acquire photoluminescent properties, such as ZrO 2 :Eu 3+ , ZrO 2 :Eu 3+ /Tb 3+ /Tm 3+ , ZrO 2 :Yb/Er, and ZrO 2 :Yb/Ho . Based on their luminescence, these materials can be used in various fields, such as white-light-emitting diode (LED), photocatalysis, pressure sensing, temperature sensing, etc.…”

“…13,14 Through rare earth doping, the materials also would acquire photoluminescent properties, such as ZrO 2 :Eu 3+ , 11 ZrO 2 :Eu 3+ /Tb 3+ /Tm 3+ , 15 ZrO 2 :Yb/Er, 16 and ZrO 2 :Yb/Ho. 17 Based on their luminescence, these materials can be used in various fields, such as white-light-emitting diode (LED), 18 photocatalysis, 19 pressure sensing, 20 temperature sensing, 21 etc.…”