Highly efficient and thermally stable broadband green-emitting BaY2Sc2Al2SiO12:Ce3+ phosphors enabling warm-white LEDs with high luminous efficacy and high color rendering index
IF 5.7 2区 材料科学Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
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引用次数: 0
Abstract
Exploring high-efficiency broadband green phosphors that match the eye's natural perception to produce light-emitting diodes (LEDs) with vivid color reproduction and exceptional saturated colors is highly desired. Herein, bright green luminescence is revealed in an all-inorganic single-phase Ce3+-activated broadband garnet-type BaY2Sc2Al2SiO12 (BYSASO:Ce3+) phosphor. Under 439 nm InGaN-based blue LED chip irradiation, the representative BYSASO:3%Ce3+ sample shows a suitable green emission with the maximum emission peak position located at 532 nm and an impressive full width at half-maximum (FWHM) of 125 nm, which can cover more cyan gap without sacrificing the green components. High internal quantum efficiency (IQE = 80.1%), outstanding thermal resistance behavior (73.9%@423 K) and color stability, and appropriate CIE color coordinates of (0.3700, 0.5394) make this excellent optical material suitable for industrial application. Finally, a prototype warm white LED device is obtained with the proposed green-emitting BYSASO:3%Ce3+ phosphor and a commercial red-emitting (Ca,Sr)AlSiN3:Eu2+ phosphor upon blue chip excitation, exhibiting extraordinary optical properties with a satisfactory Ra of 93.3 and comfortable CCT of 3958 K, as well as an excellent luminous efficacy of 105.3 lm W−1. The results indicate that the green-emitting BYSASO:Ce3+ garnet phosphor has remarkable potential to serve as a conversion material for high-quality illumination.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors