| 초록 |
We report the enhanced photoluminescence (PL) of the nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr2SiO4:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core–multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. As the results, we found that the layered structure was more effective than the mixed one in the respects of PL intensity, PL decay and thermal loss. When this layered nanocomposite (QDs on phosphor) was used to make white light emitting diode (LED), the brightness was increased by 37 %, and the color rendering index (CRI) value was raised to 88.4 compared to the mixed case of 80.4. |
