期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 116, 期 51, 页码 26850-26856出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp307192y
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资金
- Ministry of Education, Science Technology (MEST)
- National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation
- Materials and Components Research and Development
- Ministry of Knowledge Economy (MKE, Korea)
- Korea Evaluation Institute of Industrial Technology (KEIT) [10038981] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A red-emitting phosphor, CaY1-xEuxAl3O7 (CYA:Eu3+), was prepared by conventional solid-state reaction, and its structural properties were investigated by means of Rietveld refinement method and maximum entropy method using an X-ray source. XRD patterns confirm the tetragonal phase of CYA:Eu3+ phosphors. The photoluminescence properties of the samples were investigated for application to white light-emitting diodes (WLEDs). The emission spectrum is dominated by a red peak located at 616 nm due to the D-5(0) -> F-7(2) electric dipole transition of Eu3+ ions. Concentration quenching occurs when the Eu3+ concentration is about 0.35 and the critical transfer distance of the phosphor is also calculated. A white LED fabricated with blue, green, and CYA:Eu3+ red phosphor incorporated with an encapsulant in ultraviolet LEDs (lambda(max) = 396 nm) is discussed.
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