Опубликована: Янв. 1, 2025
Язык: Английский
Journal of Advanced Ceramics, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Янв. 21, 2025
Abstract The urgent demand for color conversion composites in laser‐driven projection display technology has highlighted fluorescent phosphor‐in‐glass films (PiGF) as a promising material. newly designed borogermanate glass matrix is proven to be versatile platform incorporating various commercial phosphors create multicolor PiGFs. Notably, the controlled interfacial interaction leads exceptional luminescent performance, particularly achieving unprecedented quantum efficiency rare earth ions activated (oxy)nitrides, which are of critical importance. By conducting comparative analyses static and rotating excitation modes, combined effects thermal quenching intensity on luminescence saturation under high‐power blue laser irradiation explored. developed phosphor wheel, featuring an intricate pattern structure, delivers high‐brightness high‐quality white light with luminous flux (LF) 1665 lm @26.8W mm −2 , efficacy (LE) 84.4 W −1 rendering index (CRI) 92. Introducing four‐color “polygon scheme” significantly expands gamut displays 114% NTSC, thereby enhancing visual experience superior reproduction.
Язык: Английский
Процитировано
1
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Фев. 16, 2025
Abstract For laser‐driven white light sources, phosphor‐in‐glass films (PiGFs), typically sintered onto substrates with high‐thermal conductivity, are developed and emerged as the leading materials. However, compared to other all‐inorganic color converters, such single crystals, transparent ceramics, PiGF suffers from a low saturation threshold, poor thermal stability limited irradiation durability, which restricts its practical applications. To overcome these limitations, in this study, series of h‐BN‐YAG:Ce 3+ is on opaque Al 2 O 3 /transparent (B‐Y PiGF@o/t‐Al ) by directly incorporating high‐thermal‐conductivity fillers into PiGF. The selective incorporation h‐BN establishes local heat conduction network, significantly increasing threshold luminous flux. Through optimization, maximum flux 6015.46 ± 14.46 lm 16.15 0.48 W mm −2 achieved reflective excitation mode, outperforming previous high‐performance PiGFs. addition both enhanced dissipation improved uniformity output transmissive addressing “yellow ring” effect commonly seen lighting. application potential composite has been proven ranging automotive headlights medical lighting, offering path toward brightness, more efficient, operational‐stable next‐generation lighting technologies.
Язык: Английский
Процитировано
1
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Окт. 11, 2024
Abstract Achieving single‐phase full‐spectrum white light (SFWL) phosphors is a central goal in the optical field because they simplify white‐LEDs assembly and avoid long‐term color instability. Despite many approaches are developed, current SFWL still suffer from chromaticity drift due to inconsistent thermal quenching of multiple emitting centers. Herein, an absolutely structural disorder strategy established develop single‐emitting center‐based phosphor. Precisely controlling flux added induces translation ordered Y 0.75 Ta 0.25 O 1.75 :Bi 3+ disordered 0.785 0.215 1.715 , as directly identified by STEM‐HAADF analyses. Structural enables produce with FWHM 6194 cm −1 (175 nm) employing single activator site, 1352 increase compared cyan‐emitting despite Bi occupies two lattice positions. This SFWL, coupled minimal expansion unit cell inapparent spectral overlap excitation emission bands, ensure zero‐chromaticity shift elevated temperature. A prototype using luminescent layer generates warm without perceptible CIE coordinates under various currents or after extremely continuous operation. work highlights potential designing exceptional stability.
Язык: Английский
Процитировано
6
Laser & Photonics Review, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 15, 2024
Abstract In situ growth of CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (PeQDs) in inorganic glass can address their stability issue for wide‐color‐gamut full‐color backlit displays. However, most the reported precipitated are limited by low absorption and external efficiency (EQE). This work demonstrates that CaO additive adjust polymerization borosilicate network, promote precipitation whole‐family PeQDs with a record above 75%. As result, as‐prepared green red @glass Br , 1 I 2 ) exhibit high EQEs 75% 67%, pass harsh tests after immersing water, irradiating intensive blue light experiencing 85 °C/85%RH aging over 1000 h owing to effective protection from environment help robust matrix. proof concept, white module is fabricated coupling single‐layer yellow enhanced film (PQDF) guide panel, designed prototype display device wide color gamut 115% NTSC 1953 exhibits more realistic vivid images. will pave way realization commercial application ultra‐stable QD‐backlight
Язык: Английский
Процитировано
6
Ceramics International, Год журнала: 2024, Номер 50(12), С. 21074 - 21082
Опубликована: Март 17, 2024
Язык: Английский
Процитировано
5
Ceramics International, Год журнала: 2023, Номер 50(7), С. 10609 - 10617
Опубликована: Дек. 29, 2023
Язык: Английский
Процитировано
10
Ceramics International, Год журнала: 2024, Номер 50(15), С. 26624 - 26633
Опубликована: Апрель 28, 2024
Язык: Английский
Процитировано
3
Advanced Optical Materials, Год журнала: 2024, Номер 12(35)
Опубликована: Авг. 26, 2024
Abstract Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce ) ceramic phosphor (CP) is the predominant color convert utilized in laser‐diode (LD) driven lighting. How to obtain a high‐efficiency CP challenge. A strategy depress lattice defects by Ba 2+ ‐Si 4+ replacement for ‐Al pair proposed. On basis of charge equilibrium, heavy element also can enhance thermal stability CPs. The luminous intensity at 200 °C improved from 83% 97% that room temperature, and then efficiency reaches 262 lm W −1 blue lasers white light. flux LD flashlight using increases 30% compared with commercial flashlight. These results demonstrate effective optimizing YAG:Ce performance. luminescence saturation coupled optics heat investigated.
Язык: Английский
Процитировано
3
Опубликована: Янв. 1, 2025
Due to their ease of fabrication and extremely high stability, Al2O3-based YAG:Ce PiG composite films have been widely recognized as ideal color converters in laser illumination. However, due the limitation thermal conductivity Al2O3, pump utilization rate is low efficient white light output difficult obtain on film. Here, we present a illumination component using porous stainless steel loaded YAG:Ce/glass (PGiPSS), which sintered at 800°C. Owing acceptable ability accommodate numerous luminescent particles pores, PGiPSS exhibits quantum efficiency quenching characteristics. Impressively, when irradiated by 450 nm diode with maximum excitation power density 24.10 W/mm2, prepared produced correlated temperature (CCT) 6629 K luminous 232 lm/W. These results prove that suitable for high-power, high-brightness
Язык: Английский
Процитировано
0