| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light-emitting device including a fluorescent material film with a large thickness even when using silicon oxide as a binder, and a method for manufacturing the same, in order to solve the problem that the fluorescent material film using the silicon oxide as the binder has a small thickness and hence is liable to cause absorption saturation, and reabsorption occurs when the fluorescent material is too dense, thus reducing conversion efficiency.SOLUTION: A fluorescent material layer includes a fluorescent material, potassium silicate, sodium silicate, and silica particles or a glass frit. A proportion of potassium silicate to sodium silicate is adjusted to satisfy both of printability in manufacturing and waterproofness after heat treatment.</p> |
