LED solid-state lighting devices with high efficiency, energy saving, environmental protection, etc., after 10 years of development has basically replaced the traditional incandescent, fluorescent and become a new generation of lighting. Phosphor with wavelength conversion function, in determining the white LED performance such as color rendering index, color temperature, efficiency plays an important role, is one of the key materials of LED lighting devices, research and development of high efficiency and good thermal stability of the phosphor has been Is the goal pursued by people.

figure 1. Corresponding journal cover

A new type of Ba9Lu2Si6O24: Ce3 + silicate cyan phosphor has been developed by the team of optoelectronic functional materials and devices at the Institute of Advanced Manufacturing Technology, Institute of Materials Science and Engineering, Chinese Academy of Sciences. At 160 ℃, its fluorescence quantum efficiency can be maintained at room temperature 94%, showing good thermal stability. The study won a national invention patent, the relevant results published in Advanced Optical Materials.

The group around Ba9Lu2Si6O24 material, the use of Tb3 + -Tb3 + quantum cutting and resonance energy transfer effect, a luminous efficiency of up to 144% of the green phosphor to achieve the visible light quantum tailoring; the first observed Eu2 + abnormal red emission, the use of low temperature The spectral means traced back to the source of red light; on this basis, a single white light was obtained by co-doping Ce3 + / Eu2 + / Mn2 +. Obtained a national invention patent, the relevant basic research results published in The Journal of Physical Chemistry C, Materials Research Bulletin.

Recently, the team through theoretical and experimental combination of Ba9Lu2Si6O24-based cyan phosphors in the regulation of the light-emitting properties of a systematic study. Through the process optimization, the quantum efficiency of fluorescence increased to 90%, 85% / 85% RH aging conditions more than 1600 hours of light is less than 10%. Only by using the cyan phosphor and the red powder, the white color of the color rendering index of 90 or more can be obtained on the NUV chip. Based on the calculation and understanding of the Ba9Lu2Si6O24 first-principles electronic structure and the combination of spectroscopic experimental characterization methods, the team proposed a method for calculating the bandgap of a wide bandgap inorganic non-metallic material matrix and revealed the thermal stability mechanism of the material luminescence, except Thermal and phonon interactions can cause luminescence quenching, the heat-induced reduction of material absorption is another cause of thermal quenching of luminescent materials. The results are published in the Journal of Materials Chemistry C.

In addition, the team increased the internal quantum efficiency of Gd3Al2Ga3O12: Ce3 + yellow afterglow phosphor to 82%, which provided a potentially valuable rare earth luminescent material for solving the problem of AC LED strobe. Relevant content Apply for 2 national invention patents, some of the research results published in Chemical Communications.

Research by the National Natural Science Foundation of Zhejiang Province, public technology fund, Ningbo Natural Science Fund.


Direct Driven Screw Air Compreessor

Direct driven screw air compressors have the advantages of reducing no wearing parts; having higher transmission efficiency. Peak efficiency low-pressure toothed shape, optimal flow design, large rotor, low rotate speed, high reliability for the compressors provide strong heart and synchronize efficiency and energy saving. Mute design, optimal sound-absorption structure, preset large volume front air filtration, smooth flow which all reduce noise and airflow loss to the lowest level in the industry. Direct driven screw air compressors are available from 7.5KW to 280KW with discharge pressure ranging from 8bar to 13bar. For more details, please don`t hesitate to contact us.

Direct Driven Screw Air Compreessor,Small Screw Rotary Air Compreessor,Energy Saving Driven Screw Air Compressor

Quzhou Able Machinery Equipment CO., LTD. , https://www.able-machine.com