| 학회 | 한국재료학회 |
| 학술대회 | 2004년 가을 (11/05 ~ 11/05, 인하대학교) |
| 권호 | 10권 2호 |
| 발표분야 | Display |
| 제목 | LED용 Ba3MgSi2O8:Eu 청색 형광체의 발광특성 |
| 초록 | The white light-emitting diodes (LEDs) composed of InGaN blue LED and a yellow YAG:Ce phosphor have been investigated extensively due to their applications, such as back-lighting for liquid crystal displays and incandescent lamps. These applications are particularly useful for saving electric power owing to the lower energy consumption of LEDs. In addition, there have been some detailed studies on the integration of the blue InGaN LED and the yellow YAG phosphor, as this creates white light from a combination of a blue LED emission (460 nm) and a broadband yellow YAG phosphor. Besides above-mentioned method, there are another approaches to generating white light from LEDs. White light emitting diodes (LEDs) can be fabricated by optical excitation of phosphor in the ultraviolet (UV) wavelength range. Kaufmann et al., reported a white LED using a UV AlGaInN LED pump source and broad band red, green and blue emitting phosphors with individual luminescence peak near 610, 550 and 460 nm, respectively. The LED pump source emitted at 380 – 410 nm, that is, near the boundary between the visible and UV spectrum. The phosphor blend consisted of three phosphors emitting in the red, green and blue part of the spectrum. All components of the UV-pumped phosphor system must have high UV absorption, high quantum efficiency, and also, good photo- and temperature stability. New phosphors must be identified in the red, green and especially in the blue wavelength regimes, which satisfy these requirements. In the present work, we have synthesized an Eu2+-activated Ba3MgSi2O8 blue phosphor and investigated in an attempt to develop blue phosphor for UV LED through the integration of the InGaN blue LED chip (λem=405 nm) and the Ba3MgSi2O8:Eu phosphor into a single package. |
| 저자 | 최경재1, 박정규1, 김경남1, 김창해1, 김호건2 |
| 소속 | 1한국화학(연), 2한양대 |
| 키워드 | Phosphor; LED(Light Emitting Diodes); UV Blue LED Lamp |
