Abstract
Silicate glasses with CdS and CdSe quantum dots (QDs) were synthesized for application as an inorganic color converter for a 450‐nm blue light‐emitting diode (LED). CdO and ZnS (or ZnSe) were added, and heat treatment conditions were changed to control QD formation within the silicate matrix. Absorption spectra and high‐resolution transmission electron microscopy confirmed the QD formation. Variations in absorption and photoluminescence (PL) spectra were observed with CdSe QD‐embedded glasses when heat treatment conditions varied, whereas glasses with CdS QDs did not show noticeable variation. QD‐embedded glasses were then mounted on top of a 450‐nm LED chip to make a color‐converted LED, and their electroluminescence and PL spectra as well as CIE color coordinates were investigated. The practical potential of QD‐embedded glasses as an inorganic color converter has been observed, and their spectral properties were discussed.
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