| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 가을 (10/07 ~ 10/08, 대구 EXCO) |
| 권호 |
35권 2호 |
| 발표분야 |
고분자 가공/복합재료 |
| 제목 |
White Color Rendering of High Power LED Based on Red Quantum Dot and Green Phosphor |
| 초록 |
We present a new type of quantum dot (QD)-phosphor-converted white light-emitting diode (WLED) achieved by combining the red light emission from CdSe/CdS/ZnS core-multishell QDs, the green emission from Sr2SiO4:Eu phosphor, and the blue emission of a InGaN LED chip used as the excitation source. The optical properties of the phosphor-QD polymer blends and the emission properties of the resulting WLED device were characterized in terms of temperature increase, photoluminescence, color rendering index, and color temperature. We observed that a 0.2 wt% QD content resulted in a high-power WLED chip with a high color rendering index of 83.2, a luminance of 65.86 lmW-1, and small temperature increase. We also determined that the color temperature of the WLED could be changed to a rate of about 4000 K/wt% for a QD weight ratio of about 1 wt%. QD-phosphor-converted WLEDs have great potential in future illumination applications. |
| 저자 |
우주연, 김경남, 정소희, 심형철, 김용신, 김덕종, 김준동, 한창수
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| 소속 |
한국기계(연) |
| 키워드 |
quantum dot; WLED; color rendering index; color temperature
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| E-Mail |
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