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We report high power (>3 mW) mid-infrared superluminescent emission around 2100 cm−1 from Quantum Cascade devices. The superluminescent emission shows a Gaussian shape spectrum with FWHM of 80 cm−1.
A yellow-emitting phosphor, CaO:Ce 3+ ,Na + is synthesized by solid-state reaction. The photoluminescence spectra, fluorescence decay curves and the temperature-dependent luminescence are investigated. The results show that CaO:Ce 3+ ,Na + can be excited by blue light, which matched well with the emission wavelengths of blue InGaN LED chips. When excited at 474nm, in...
A series of Eu 2+ and Mn 2+ coactivated Ca 3 Al 2 (SiO 4 ) 3−δ Cl 4δ phosphors have been synthesized by solid state reactions and their luminescence properties have been investigated by means of powder diffuse reflection, photoluminescence excitation and emission spectra, and lifetimes. The phosphor Ca 3 Al 2 (SiO ...
The efficiency and reliability of solid-state lighting devices strongly depends on successful thermal management. High-brightness light emitting diodes (LEDs), as a strong candidate for the next generation, general illumination applications, were developed by improving luminous efficiency and integrating multi-chips within limited areas. This resulted in the thermal management challenge that is able...
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