Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(32), С. 12451 - 12457
Опубликована: Янв. 1, 2024
A new type of efficiency and low thermal quenched BGAGG: 0.07Cr 3+ far-red phosphor was synthesized used to prepare pc-LED for plant lighting. Its positive effects were demonstrated in cultivation experiments bok choy Micro-Tom.
Язык: Английский
Nature Photonics, Год журнала: 2024, Номер 18(6), С. 562 - 568
Опубликована: Март 1, 2024
Язык: Английский
Процитировано
93
Light Science & Applications, Год журнала: 2023, Номер 12(1)
Опубликована: Окт. 7, 2023
Achievement of high photoluminescence quantum efficiency and thermal stability is challenging for near-infrared (NIR)-emitting phosphors. Here, we designed a "kill two birds with one stone" strategy to simultaneously improve the NIR-emitting Ca3Y2-2x(ZnZr)xGe3O12:Cr garnet system by chemical unit cosubstitution, revealed universal structure-property relationship luminescence optimization mechanism. The cosubstitution [Zn2+-Zr4+] [Y3+-Y3+] played critical role as reductant promote valence transformation from Cr4+ Cr3+, resulting reconstruction octahedral sites Cr3+. introduction also contributed rigid crystal structure. These aspects together realized internal 96% excellent 89%@423 K. Moreover, information encryption "burning after reading" was achieved based on different resistance phosphors acid. developed phosphor-converted light-emitting diode demonstrated promising applications in bio-tissue imaging night vision. This work provides new perspective developing high-performance phosphor materials.
Язык: Английский
Процитировано
82
Advanced Optical Materials, Год журнала: 2023, Номер 11(7)
Опубликована: Янв. 19, 2023
Abstract Broadband near‐infrared (NIR) phosphors have recently received considerable attention in spectroscopy technology fields, but designing inexpensive, emission peaks centered above 800 nm, and multimodal broadband NIR luminescence material still remains a great challenge. Here, by selecting stannate compound Mg 2 SnO 4 (MSO) as the host, kind of phosphor MSO:Cr 3+ with multimode properties is reported. The designed exhibits an peaking at nm full‐width half maximum 180 (≈2730 cm −1 ). site occupation Cr MSO unraveled density functional theory calculation. constructed light‐emitting device based on displays high output power 187.19 mW@100 mA remarkable photoelectric efficiency 13.67%, its multifunctional applications information encryption, non‐destructive detection, so are also demonstrated. Additionally, through defect reconstruction, presents superior persistent (PersL) PersL duration time longer than 50 h. This work provides feasible strategy to develop intelligent optical integrated low‐cost compounds host toward versatile such detection bioimaging.
Язык: Английский
Процитировано
50
Materials Horizons, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
A record-breaking anti-thermal quenching of broadband NIR emission (198%@543 K) is achieved in a Cr 3+ -activated garnet phosphor via excited-state population optimization.
Язык: Английский
Процитировано
32
Laser & Photonics Review, Год журнала: 2024, Номер 18(10)
Опубликована: Май 3, 2024
Abstract Even though there have been significant advancements in the development of Cr 3+ ‐activated near‐infrared (NIR) phosphors, challenge still remains to develop highly efficient and thermally stable NIR phosphors. Here, Ca 4‐x Zn x HfGe 3 O 12 :0.03Cr solid solution phosphors with 834–806 nm emission are constructed by substituting 2+ for , thereby facilitating formation [ZnO 6 ] luminescence site. The coexistence [HfO [Zn/CaO centers is confirmed through DFT calculation, time‐resolved photoluminescence (TRPL) spectroscopy, low‐temperature‐photoluminescence (77 K) spectroscopy. effectively resolves issue lattice mismatch between . Furthermore, simultaneous enhancement intensity thermal stability realized a synergistic combination distortion rigidity enhancement. By optimizing substitution concentration internal quantum efficiency (IQE) 92% an external (EQE) 29% finally achieved. Meanwhile, also enhanced from 59%@400 K (x = 0) 81%@400 0.8). developed phosphor‐converted light‐emitting diodes (pc‐LEDs) exhibit promising prospects fields security, biomedicine, non‐destructive testing rapid identification.
Язык: Английский
Процитировано
22
Chemical Engineering Journal, Год журнала: 2024, Номер 499, С. 156274 - 156274
Опубликована: Сен. 30, 2024
Язык: Английский
Процитировано
19
Small, Год журнала: 2025, Номер unknown
Опубликована: Фев. 4, 2025
Abstract The pursuit of broadband near‐infrared (NIR) phosphors for next‐generation smart NIR light sources has garnered extensive interest. However, developing efficiently excitable by blue to produce thermally stable and highly efficient emission surpassing 830 nm remains a formidable challenge. Herein, novel CaGd 2 Ga 4 SiO 12 garnet is reported, designed through structure reconstruction approach host Cr 3+ ions high‐performance phosphor. By strategically introducing Jahn–Teller distortion at the octahedral sites via chemical pressure, endowed with super‐broadband spanning 600–1300 centered 837 nm. full‐width half maximum (FWHM) varies from 187 223 across doping concentrations, highest internal quantum efficiency (IQE) 99.01%. Remarkable luminescence thermal stability (90.37%@423 K) bolstered weak electron‐phonon coupling (EPC) effect trap‐mediated energy compensation, result heterovalent ion substitutions in dodecahedral tetrahedral sites. Furthermore, prototype phosphor‐converted light‐emitting diode (pc‐LED) fabricated, delivering substantial output power 287.7 mW 1100 mA conversion (PCE) 24.4% 30 mA, enabling impressive performance versatile applications, including component analysis, non‐destructive testing, imaging, night vision.
Язык: Английский
Процитировано
12
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Фев. 21, 2025
Abstract Developing tunable broadband near‐infrared (NIR) fluorescent materials with outstanding luminescence properties and superior thermal robustness remains a significant challenge for next‐generation intelligent NIR light sources. Herein, high‐performance large‐scale NIR‐emitting garnet‐type phosphor, SrLu 2 Al 3 ScSiO 12 :Cr 3+ (SLASSO:Cr ), is presented. Upon 450 nm blue excitation, SLASSO:1%Cr phosphor yields emission full width at half maximum of 108 prominent sharp peak 694 superimposed on radiation, which attributed to the co‐occupation Cr ions dominant [AlO 6 ] octahedral site (Cr1 site) subordinate [ScO (Cr2 site). Remarkably, as ⁺ content increases, red‐shift in wavelength spanning from 785 bandwidth broadening 89 152 are observed, stems weakening crystal field strength energy redistribution within Cr1 Cr2 centers regulated by formation local ‐Cr ion pairs. Notably, optimal sample boasts an excellent internal quantum efficiency 89.4% exceptional stability (97.6%@423 K). Additionally, fabricated phosphor‐converted light‐emitting diode devices demonstrate promising multi‐functional applications, including plant cultivation, night vision, bioimaging non‐destructive detection.
Язык: Английский
Процитировано
3
Advanced Optical Materials, Год журнала: 2023, Номер 11(23)
Опубликована: Июль 26, 2023
Abstract Applications in near‐infrared (NIR) have been explored significantly many fields, including bioimaging, night vision, plant growth, and chemical analysis. Different emission profiles are required within the same industry. Developing luminescent materials with different tuning methods is reliable for controlling NIR regions (NIR‐I, 700–1000 nm; NIR‐II, 1000–1700 nm). Spinel phosphors promising candidates due to their ability modulate crystal field. Understanding parameters that influence degree of inversion spinel compounds crucial harness variability structure. Cr 3+ Ni 2+ ideal activators NIR‐I NIR‐II emissions, respectively. However, there a need emit region when excited by visible light. Although energy transfer method combining two considered, this review focuses on types structures, discussing common strategies tune host The goal achieve desired shift broadness entire spectrum, highlighting importance spectrum practical applications.
Язык: Английский
Процитировано
43
Rare Metals, Год журнала: 2023, Номер 42(11), С. 3787 - 3796
Опубликована: Окт. 3, 2023
Язык: Английский
Процитировано
35