Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(13), P. 3941 - 3949
Published: Jan. 1, 2024
A series of Cr 3+ -activated near-infrared luminescent materials were successfully prepared by using [Zn 2+ -Ge 4+ ] and [Ga -Ga co-unit substitutions, with the peak luminescence tuned from 713 to 767 nm FWHM extended 92 155 nm.
Language: Английский
Advanced Optical Materials, Journal Year: 2022, Volume and Issue: 11(3)
Published: Dec. 5, 2022
Abstract Development of chromium‐doped luminescent materials is pertinent to many emerging applications, ranging from agriculture, food industry noninvasive health monitoring. The fundamental importance chromium‐activated in the field optics and biomedicine makes rapid development novel relevant applications. Herein, recent advances on luminescence principle photoluminescence (PL) optimization for Cr 3+ ‐activated together with their potential applications are reviewed. different types most recently developed ‐doped design principles systematically summarized. associations between crystal structure near‐infrared (NIR) PL properties, as well performance‐evaluating parameters introduced examples known NIR emitting phosphors, which will be helpful explore future materials. Based control, site engineering, electron–phonon coupling, several efficient strategies optimizing performances including bandwidth, thermal stability, quantum efficiency proposed. Then, fields analysis, night vision, information encryption, optical sensors surveyed. Finally, challenges promising
Language: Английский
Citations
149
Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)
Published: Oct. 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.
Language: Английский
Citations
77
Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(10), P. 4220 - 4226
Published: March 1, 2023
Broadband near-infrared (NIR) phosphors are the critical component of phosphor converted NIR light-emitting diode (LED) light sources. However, there still a lack with excellent external quantum efficiency (EQE) and thermal stability. Here, we report highly efficient broadband Y3Ga3MgSiO12: Cr3+. The optimized yields an internal (IQE) EQE 79.9 33.7%, respectively. integrated emission intensity remains at 84.4% that room temperature when heated to 423 K. A LED lamp was made by combining as-prepared blue InGaN chip, which shows output power 89.8 mW photoelectric conversion 17.1% driven 525 input power. Our research provides promising high for source.
Language: Английский
Citations
57
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(10)
Published: May 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.
Language: Английский
Citations
20
Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 29, 2025
Abstract Achieving ultra‐broadband absorption and enhancing the near‐infrared (NIR) emitting properties of NIR phosphors is a key challenge to realize its multiple applications, such as solar spectrum conversion, spectral analysis, night vision. Here, novel phosphor system MTiTaO 6 : Cr 3+ ( M = Al , Ga Sc ), with an excitation broad 421 nm enhanced emission reported. It widest among known ‐doped phosphors. Structural spectroscopic analysis shows that originates from overlap luminescence centers. Additionally, peak red‐shifted 816 871 increasing ion radius, intensity enhanced, which not only makes spectra more compatible response curve c‐Si cells, but also gives it advantage in spectroscopy applications. Comparison water alcohol demonstrate promising
Language: Английский
Citations
2
Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(24)
Published: Oct. 11, 2023
Abstract Transition metal chromium (Cr) ion‐doped inorganic materials exhibit distinct tunable broadband near‐infrared luminescence, and they have promising applications including nondestructive composition analysis, night vision, biomedicine, plant illumination, afterglow anticounterfeiting. Currently, the most critical issue is to optimize their full width at half maxima, thermal stability, internal/external quantum efficiency. This review systematically summarizes strategies effectively improve photoluminescence performance of near‐infrared‐emitting with transition ions. Key examples design preparation Cr luminescence different modes, a detailed discussion properties luminescent materials, summary generic help explore novel efficient Cr‐doped phosphor are provided. Next, latest developments trends in these presented for variety application scenarios. Finally, future research directions new challenges faced also discussed.
Language: Английский
Citations
42
Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(27), P. 10772 - 10779
Published: June 27, 2023
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs), as a new generation of NIR lighting sources, have wide prospects in the areas food analysis and biological night vision imaging. Nevertheless, phosphors are still limited by short-wave narrowband emissions well low efficiency. Herein, series phosphors, LuCa2ScZrGa2GeO12:Cr3+ (LCSZGG:Cr3+), with broadband been developed first reported. At 456 nm excitation, optimized LCSZGG:0.005Cr3+ phosphor represents an ultra-broadband emission within range 650–1100 nm, peaking near 815 full width at half maximum 166 nm. Furthermore, possesses good internal quantum efficiency 68.75%, its integrated intensity 423 K retains about 64.17% that room temperature. By combining sample blue chip, pc-LED device is fabricated, which has excellent output power 37.88 mW photoelectric conversion 12.44% under 100 mA driving current. The aforementioned results demonstrate these LCSZGG:Cr3+ expected light sources.
Language: Английский
Citations
32
Ceramics International, Journal Year: 2023, Volume and Issue: 49(20), P. 32860 - 32867
Published: Aug. 2, 2023
Language: Английский
Citations
27
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(5)
Published: Jan. 8, 2024
Abstract Near‐infrared (NIR) light sources have gained immense popularity in recent years due to their wide range of applications various fields, including spectroscopy and biomedical imaging. However, the limited emission bandwidth NIR phosphors is a significant bottleneck development. Here, novel strategy reported broaden by awakening dumb site. Na 4 M 3 Ta(PO ) 6 : Cr 3+ ( = Al , Ga In phosphor synthesized, which exhibits greatly broadened from 134 232 nm. Structural spectral analysis reveals that NaO octahedral site has severe t 2g ‐type distortion, making it for . By introducing larger at site, angular distortion decreases normal range, enabling luminescence again. Along with bandwidth, peak also redshifts 802 977 nm, giving advantages applications. Interestingly, awakened shows even better properties than original M/TaO These findings reveal insight into could potentially revolutionize design phosphors.
Language: Английский
Citations
16
Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(8), P. 2814 - 2823
Published: Jan. 1, 2024
The double luminescence centers of the Y 2 Mg Al Si O 12 :Cr 3+ phosphor are accurately analyzed by a site elimination strategy.
Language: Английский
Citations
15