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초록· 키워드
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Red quantum-dot (QD) walls and films were applied to conventional 6-inch white LED (light-emitting diode) lightings, consisting of blue LED chips and yellow phosphors, to improve the color rendering index (CRI). The emission spectra, the CRI, the illuminance, and the luminance properties of six different configurations were investigated. The vertical QD wall surrounding the LED chips and defining the emission area played an important role in improving the R9 CRI for strong, saturated red while the QD film laminated on either the bottom or the top surface of the diffuser plate formed a vertical cavity, enhanced the color conversion efficiency, and increased the average CRI Ra and Re. This study clearly suggests that appropriate QD configuration can be used to increase the CRI of conventional white LED lightings at nearly no expense to the luminous efficiency.
목차
Ⅰ. INTRODUCTION
Ⅱ. EXPERIMENT
Ⅲ. RESULTS AND DISCUSSION
Ⅳ. CONCLUSIONS
REFERENCES
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