Potential application of Eu3+ ion-activated Ca2InTaO6 red phosphor with high thermal stability in WLEDs

The high-temperature solid-phase method synthesized a series of red phosphors Ca2InTaO6: xEu3+. Their most substantial emission peak is at 612 ​nm, FWHM ​= ​8 ​nm, and they can be excited under blue light. Has very excellent thermal stability, still has 77.7% of normal emission intensity at 150 ​°C, and the luminous intensity decreases very slowly between 80 ​°C–150 ​°C. In the high temperature durability test at 120 ​°C and 150 ​°C, the sample can still maintain good luminous intensity for a long time. The WLED was fabricated using fabricated samples in combination with commercial green and blue phosphors; it has Ra ​= ​90.1 and R9 ​= ​83.4. All expected test results prove that this sample is suitable for modern LED lighting.