METHOD FOR TREATING SURFACE OF PHOSPHOR, PHOSPHOR, LIGHT-EMITTING DEVICE, AND ILLUMINATION DEVICE
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United States of America Patent
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May 21, 2015
app pub date -
Jun 4, 2013
filing date -
Jun 8, 2012
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Abstract
Provided are a method for treating the surface of a (Sr,Ca)AlSiN3 nitride phosphor that can improve the moisture-resistance reliability thereof without deterioration in optical properties, a phosphor, a light-emitting device, and an illumination device. The surface of a phosphor is treated in an immersion step of immersing a phosphor of which the host crystal has a crystal structure substantially identical with that of (Sr,Ca)AlSiN3 crystal in an aqueous ammonium phosphate-containing solution (Step 1) and a heat-treating step of leaving the phosphor after the immersion step in an environment at a temperature of 250 to 550° C. for 2 to 24 hours (Step 2).
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