期刊
IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY
卷 15, 期 4, 页码 617-620出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDMR.2015.2464375
关键词
Aging test; color rending index; CRI; high-power LED modules; phosphor layer
资金
- Science Park Administration [102A10]
- National Science Council [NSC 101-2622-E-269-020, NSC 101-3113-E-110-002-CC2, MOST 103-2622-E-110-009-CC2, MOST 103-2632-E-269-001]
- Advanced Optoelectronic Technology Center of the National Cheng Kung University
This paper reported the high-temperature performances of glass-based phosphor-converted warm-white light-emitting diodes (PC-WWLEDs). The fabrication and characteristics of low-temperature phosphor (Yellow:Ce:(3+): YAG, Greed:Tb3+:YAG, Red: CaAlClSiN3:Eu2+) doped glass were presented for high color rendering indexes warm-white-light-emitting diodes. As demonstrated, the PC-WLEDs maintained good thermal stability at the high temperature operation; the characterization results of color coordinates (x, y) = (0.32, 0.28) is as follows: quantum yield (QY) = 55%, color rending index (CRI) = 85, and correlated color temperature (CCT) = 3900 K. The results showed that the PC-WLEDs maintained good thermal stability at the high temperature operation. The QY decay, CRI attenuation and chromaticity shift in glass-based high-power PC-WLEDs were also compared with those of silicone-based counterparts thermally aged at 150 degrees C and 250 degrees C. These results indicated that the glass-based PC-WLEDs exhibited better thermal stability than the silicone. The color rendering indexes (CRIs) of glass phosphor hopefully have potential used as a phosphor layer for high-performance and low-cost PC-WLEDs for the next-generation indoor solid-state lighting applications.
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