Deep-red to NIR mechanoluminescence in centrosymmetric perovskite MgGeO3: Mn2+ for potential dynamic signature anti-counterfeiting

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 453, P. 139671 - 139671

Published: Oct. 8, 2022

Language: Английский

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Designing LiTaO3:Ln3+,Eu3+ (Ln = Tb or Pr) perovskite dosimeter with excellent charge carrier storage capacity and stability for anti-counterfeiting and flexible X-ray imaging

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 141685 - 141685

Published: Feb. 2, 2023

Language: Английский

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Charge carrier trapping management in Bi3+ and lanthanides doped Li(Sc,Lu)GeO4 for x-ray imaging, anti-counterfeiting, and force recording

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(1)

Published: Feb. 21, 2024

Discovering energy storage materials with rationally controlled trapping and de-trapping of electrons holes upon x-rays, UV-light, or mechanical force stimulation is challenging. Such enable promising applications in various fields, for instance multimode anti-counterfeiting, x-ray imaging, non-real-time recording. In this work, photoluminescence spectroscopy, the refined chemical shift model, thermoluminescence studies will be combined to establish vacuum referred binding (VRBE) diagrams LiSc1−xLuxGeO4 family compounds containing level locations Bi2+, Bi3+, lanthanides. The established VRBE are used develop Bi3+ lanthanides doped phosphors understand processes charge carriers physical excitation means. intensity irradiated LiSc0.25Lu0.75GeO4:0.001Bi3+,0.001Eu3+ about two times higher than that state-of-the-art phosphor BaFBr(I):Eu2+. Particularly, a induced carrier phenomenon appears Eu3+ co-doped LiSc1−xLuxGeO4. Proof-of-concept recording, imaging demonstrated. This work not only deepens our understanding capturing sources, but can also trigger scientists discover new by exploiting VRBEs bismuth lanthanide levels.

Language: Английский

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Microstrain‐Stimulated Elastico‐Mechanoluminescence with Dual‐Mode Stress Sensing

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)

Published: April 10, 2024

Abstract Elastico‐mechanoluminescence technology has shown significant application prospects in stress sensing, artificial skin, remote interaction, and other research areas. Its progress mainly lies realizing visualization 2D or even 3D stress‐sensing effects using a passive sensing mode. However, the widespread promotion of mechanoluminescence (ML) is hindered by issues such as high strain thresholds single mode based on luminous intensity. In this study, highly efficient green‐emitting ML with dual‐mode characteristics driven microscale developed LiTaO 3 :Tb 3+ . addition to single‐mode intensity, self‐defined parameter ( Q ) also introduced factor for velocity. Impressively, fabricated film capable generating discernible signals when supplied strains low 500 µst. This current minimum value that can drive ML. study offers an ideal photonic platform exploring potential applications rare‐earth‐doped elastico‐ML materials interaction devices, high‐precision sensors, single‐molecule biological imaging.

Language: Английский

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Novel spectral band: ultraviolet A mechanoluminescence from Bi³⁺-doped LiYGeO₄

Journal of Materials Chemistry C, Journal Year: 2022, Volume and Issue: 10(44), P. 16670 - 16678

Published: Jan. 1, 2022

Mechanoluminescence peaked at 355 nm (Bi 3+ : 3 P 1 → S 0 ) was observed in an orthorhombic phase compound of LiYGeO 4 :Bi , which has widened the mechanoluminescence spectral wavelength into UV range.

Language: Английский

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Cation-defect-induced self-reduction towards efficient mechanoluminescence in Mn²⁺-activated perovskites

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(9), P. 3476 - 3487

Published: Jan. 1, 2023

A deep-red to NIR ML phosphor of MgGeO 3 : Mn 2+ is reported, and defect believed influence the properties by comparing phosphor’s luminescent before after 4+ –Mn self-reduction.

Language: Английский

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Multimode‐Responsive Luminescence Smart Platform by Single‐Sm³⁺‐Doped Phosphors

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(12)

Published: March 22, 2023

Abstract Multimode‐responsive luminescence materials play pivotal roles both in understanding the fundamental photophysical processes and fabricating smart devices. To obtain inorganic phosphor‐based multi‐responsive materials, however, triple or even quadruple doping ions a series of hosts with different compositions are frequently used. In this work, single‐rare‐earth‐doped phosphor, Sr 2 YGaO 5 :Sm 3+ , is first reported. This single‐Sm ‐doped phosphor exhibits unique excitation‐wavelength, ultraviolet/X‐ray charging, thermal stimulated luminescence‐color‐changeable features. Further studies confirm that multimode‐responsive attributed to superior optical integration host (Sr ) dopant (Sm emissions under specific stimulation conditions. Importantly, study provides novel concept for designing multifunctional which would be conducive development platforms.

Language: Английский

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Self-recoverable NIR mechanoluminescence from Cr3+ doped perovskite type aluminate

Advanced Powder Materials, Journal Year: 2023, Volume and Issue: 3(2), P. 100165 - 100165

Published: Nov. 8, 2023

Mechanoluminescent (ML) materials, which have the ability to convert mechanical energy optical energy, found huge promising applications such as in stress imaging and anti-counterfeiting. However, main reported ML phosphors are based on trap-related ones, thus hindering practical due requirement of complex light pre-irradiation process. Here, a self-recoverable near infrared (NIR) material LaAl1-xO3: xCr3+ (x = 0.2 %, 0.4 0.6 0.8 1.0 % 1.2 %) has been developed. Based preheating method corresponding performance analysis, influences residual carriers eliminated detailed dynamic luminescence process analysis is realized. Systematic experiments conducted reveal origin emissions, demonstrating that dictated more by non-centrosymmetric piezoelectric crystal characteristic. In general, this work provided significant references for exploring efficient NIR may provide potential anti-counterfeiting bio-stress sensing.

Language: Английский

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Moderate Trap Engineering for Enhanced Thermal Stability and High Efficiency in a Bi³⁺-Doped Phosphor

Chemistry of Materials, Journal Year: 2023, Volume and Issue: 35(17), P. 7125 - 7132

Published: Aug. 29, 2023

Trap engineering is widely applied to contend with thermal quenching of phosphors. However, the incidental detriment luminescent efficiency has long been neglected. Herein, we propose a paradigm for achieving high-performing Bi3+-doped phosphor moderate trap engineering. Through introducing appropriate traps in neutral atmosphere and proper doping concentration, have successfully created novel Ba2GdAlO5:Bi3+ yellow that exhibits exceptional stability (104.1%@423 K) high internal quantum yield (82.78%), which top performance among The oxygen vacancy Bi2+ were identified as responsible through X-ray photoelectron spectroscopy, while their depth was measured be 0.9 eV by using thermoluminescence. Notably, exhibited photochromism upon near-ultraviolet (n-UV) excitation could bleached heat treatment. These observations highlight its potential various applications. Finally, two white lighting devices color rendering index exceeding 90 prepared n-UV LED chips applying one This study not only provides high-performance suitable high-quality (WLED) but also proposes methodology designing phosphors stability..

Language: Английский

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Liquid Nitrogen Temperature Mechanoluminescence and Persistent Luminescence

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(46)

Published: Aug. 3, 2023

Abstract As novel stress‐sensing materials, the reported mechanoluminescence (ML) phosphors work only at or above room temperature. Herein, ML response to low temperatures (77 K) is extended by employing ultra‐shallow traps. Strong stimulated handwriting force followed persistent luminescence observed in BaSi 2 O N :Eu 2+ (BSON) 77 K. The UV pre‐irradiated BSON can still keep characteristics of with 45% intensity after 300 min. Abundant traps depth ≈0.19 eV are found and revealed be responsible for low‐temperature luminescence. Manipulation realized doping Ge, Er, Ce ions BSON, leading significant enhancement Together ML, also exhibit memory ability replicate pre‐applied pattern simply afterglow. finding advances state‐of‐the‐art sensing under temperature conditions.

Language: Английский

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