Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Ceramics International, Journal Year: 2025, Volume and Issue: unknown
Published: May 1, 2025
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(46), P. 63831 - 63839
Published: Nov. 12, 2024
Near-infrared (NIR) light allows fast and nondestructive detection with deep penetration into biological tissues is widely used in food inspection, biomedical imaging, night vision security, other fields. Cr3+-doped NIR first region (NIR-I) phosphors have many interesting features that attracted a lot of attention recently. However, practical issues, such as low photoluminescence quantum efficiency poor thermal stability, need to be addressed. We synthesized Lu2SrAl4SiO12 garnet-type using high-temperature solid-state reaction method. Under blue-light (@ 430 nm) excitation, the exhibited broadband NIR-I emission range 600–1000 nm, an peak at 710 nm. This system unique, had multipeak sharp-line superposition Cr3+ ions were situated relatively strong crystal field environment, opposed weak environment for matrix. The optimal doping content was 2 mol %, its internal ∼76.8%. Surprisingly, this phosphor showed antithermal quenching effect, integrated luminescence intensity measured 573 K 206.3% 303 K. found caused by extremely expansion coefficient rigid structure matrix temperature range, well weakening electron–phonon coupling increasing temperature. optimized packaged blue chip phosphor-converted light-emitting diode device. source device output power 119.02 mW electro-optical conversion 11.02% under driving current 300 mA. application potential demonstrated high-resolution imaging.
Language: Английский
Citations
3
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: May 5, 2025
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs), a widely used NIR light source, are typically prepared by sealing the phosphor powder and an LED chip with epoxy resin. One issue that pc-LEDs frequently encounter is aging deterioration of resin over time, which leads to self-absorption sharp decline in emission efficiency. Here, we report synthesis chemically stable luminescent material composed Cr3+-doped Ba2NaNb5O15 nanocrystals measuring 10-15 nm, Cr3+ ions located octahedral centers nanocrystals. Under 460 nm excitation, transparent glass-ceramic exhibited broadband range 600-1400 originated from electronic transition excited state 4T2 ground 4A2. The peak was at ∼810 FWHM ∼230 internal quantum efficiency reached ∼0.81%. We constructed pc-LED device using optimized NIR-emitting glass-ceramics commercially available blue chip, demonstrating its promising application night-vision lighting. Our study provides basis for preparation glass-ceramic-based devices as improved alternative solid-state illumination.
Language: Английский
Citations
0
Open Ceramics, Journal Year: 2024, Volume and Issue: 19, P. 100642 - 100642
Published: July 14, 2024
Filling the cyan gap is key element in achieving full-spectrum illumination using violet chip to excite red, green and blue phosphors. However, designing phosphors suitable for light excitation with excellent performance remains challenging. Herein, a novel phosphor Ba9Lu2-x-nSi6O24:xCe (n-BLS:Ce) multiple crystal sites of Ba2+ Lu3+ Ce3+ ions was designed prepared via crystal-site engineering. The at emit ultraviolet 385 nm under 325 excitation, 485 395 excitation. favorable occupation could be realized by introducing Lu vacancies. Significantly, emission intensity Ba9Lu1.4Si6O24:0.3Ce (n0.3-BLS:Ce) vacancies effectively improved 47 % compared Ba9Lu1.7Si6O24:0.3Ce (n0-BLS:Ce) without And 150 °C retains 96 that room temperature. color rendering index increases from 87.9 94.5 after supplementing w-LEDs devices combining commercial green, chip, indicating its potential practical application lighting. This work also provides new ideas design development efficient high-quality light-emitting materials.
Language: Английский
Citations
1
Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Citations
1
Published: Jan. 1, 2024
Filling the cyan gap is key element in achieving full-spectrum illumination using violet chip to excite red, green and blue phosphors. However, designing phosphors suitable for light excitation with excellent performance remains challenging. Herein, a novel phosphor Ba9Lu2-x-nSi6O24:xCe (n-BLS:Ce) multiple crystal sites of Ba2+ Lu3+ Ce3+ ions was designed prepared via crystal-site engineering. The at emit ultraviolet 385 nm under 325 excitation, 485 395 excitation. favorable occupation could be realized by introducing Lu vacancies. Significantly, emission intensity Ba9Lu1.4Si6O24:0.3Ce (n0.3-BLS:Ce) vacancies effectively improved 47% compared Ba9Lu1.7Si6O24:0.3Ce (n0-BLS:Ce) without And 150 °C retains 96% that room temperature. color rendering index increases from 87.9 94.5 after supplementing w-LEDs devices combining commercial green, chip, indicating its potential practical application lighting. This work also provides new ideas design development efficient high-quality light-emitting materials.
Language: Английский
Citations
0
Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 1, 2024
Language: Английский
Citations
0
Journal of the European Ceramic Society, Journal Year: 2024, Volume and Issue: unknown, P. 117093 - 117093
Published: Nov. 1, 2024
Language: Английский
Citations
0
Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Citations
0