English

Changchun Institute of Optics and Mechanics has developed blue-green fluorescent transparent ceramics for laser lighting, laying a key fluorescence material foundation for full color laser lighting

70
2023-09-26 14:05:28
See translation

The project of the National Natural Science Foundation of China (Jilin Province) "Multicolor Transparent Silicate Garnet Fluorescent Ceramics for Laser Lighting" presided over by Zhang Jiahua, a researcher in the State Key Laboratory of Luminescence and Applications of Changchun Institute of Optics and Fine Mechanics, has made breakthrough progress, developed green fluorescent transparent ceramics, filled the international gap, and laid a foundation for key fluorescent materials for full-color laser lighting.

The research results are titled "Cyan green mitting Ca3Sc2Si3O12: Ce3+transparent ceramic: a promising color converter for high brightness laser lighting" and published in the top international ceramic journal "Journal of Advanced Ceramics" (2023, 12 (9): 1731-1741)

Laser driven fluorescent transparent ceramics are the preferred solution for obtaining high brightness laser lighting sources, which have urgent needs in automobiles, film and television, and search and rescue lighting. At present, the available fluorescent transparent ceramics for laser illumination are limited to two types of aluminate garnet, yellow YAG: Ce and green LuAG: Ce, which cause incomplete color of the light source and poor color restoration. The lack of cyan is the root cause of these problems, known as the "cyan cavity".

To address the above issues, the project team selected high-efficiency green fluorescent Ca3Sc2Si3O12: Ce3+(CSS: Ce) silicate garnet for ceramic research. In response to the bottleneck of ceramic densification caused by low silicon ion diffusion coefficient, a two-step sintering strategy based on sintering kinetics was proposed, and high-quality green fluorescent transparent ceramics were successfully obtained. Ceramics are suitable for blue light excitation, with a transmittance of 71% at the emission wavelength, an internal quantum efficiency of 91%, a fluorescence quenching temperature of 838 K, and an anti irradiation density of 45.6 W/mm2. At this excitation density, the forward lumen efficiency is 162 lm/W.

The above excellent performance can be comparable to the current commercial YAG: Ce and LuAG: Ce fluorescent transparent ceramics, fully indicating that CSS: Ce silicate garnet fluorescent transparent ceramics are ideal blue-green fluorescence conversion materials for laser lighting, and will play an irreplaceable role in filling "blue-green voids" to achieve full color laser lighting, with broad application prospects.

(a) CSS: Emission spectra of Ce green fluorescent transparent ceramics, transmission spectra, and images under sunlight and blue light; (b) Under the excitation of high-density blue laser, the stable output of lumen flux over time, high brightness blue-green fluorescence images, and temperature distribution maps of ceramic chips, with a maximum temperature of 239 ℃, demonstrate excellent heat resistance.

Source: Sohu

Related Recommendations
  • Laser blasting promises to solve global plastic problem

    Recently, researchers announced the development of a way to use laser blasting to break down plastic and other material molecules into their smallest parts for future reuse.This method involves placing these materials on a two-dimensional material called transition metal dichalcogenides and then irradiating them with light.This discovery has the potential to improve the way we handle plastics that...

    2024-07-16
    See translation
  • Trumpf Laser releases latest fiscal year data

    Recently, German laser giant Trumpf released data for the fiscal year 2023/24. The latest financial report shows that the group's sales decreased by 4% and order volume decreased by 10% in the fiscal year 2023/24.Despite these setbacks, Germany has become the company's strongest single market for the first time in many years, highlighting a shift in market dynamics.At the end of this fiscal year, ...

    2024-07-19
    See translation
  • Laser Wire Solutions and HumanTek Jointly Enter the Korean Laser Wire Stripping Market

    Recently, Laser Wire Solutions officially welcomed its important distribution partner in South Korea - HumanTek. This cooperation marks the official establishment of HumanTek as a branch of Laser Wire Solutions in Korea, and both parties will work together to provide excellent services for the Korean laser wire stripping market.HumanTek, with its deep foundation in the Korean market and strong pro...

    2024-07-03
    See translation
  • Swedish KTH develops 3D printed quartz glass micro optical devices on optical fibers

    In what has been described as the "first communication", Swedish researchers conducted 3D printed quartz glass micro optical devices on the tip of optical fibers. They said that this progress could lead to faster Internet and better connectivity, as well as innovations such as smaller sensors and imaging systems.Scientists from the KTH Royal Institute of Technology in Stockholm have stated that co...

    2024-05-23
    See translation
  • University of California, Los Angeles Joins the American High Power Laser Facility Alliance

    The University of California, Los Angeles is joining LaserNetUS, a high-power laser facility alliance established by the Department of Energy, aimed at advancing laser plasma science.Unique facilities are located in universities and national laboratories across the United States and Canada, providing a wide range of opportunities for researchers and students.The Phoenix Laser Laboratory at the Uni...

    2023-09-15
    See translation