TY - JOUR
T1 - White-light emission from near UV InGaN-GaN LED chip precoated with blue/green/red phosphors
AU - Sheu, J. K.
AU - Chang, S. J.
AU - Kuo, C. H.
AU - Su, Y. K.
AU - Wu, L. W.
AU - Lin, Y. C.
AU - Lai, W. C.
AU - Tsai, J. M.
AU - Chi, G. C.
AU - Wu, R. K.
N1 - Funding Information:
Manuscript received May 15, 2002; revised September 18, 2002. This work was supported by the National Science Council under Grant NSC 90-2215-E-008-043 and Grant NSC 90-2112-M-008-046. J. K. Sheu and G. C. Chi are with the Optical Science Center, National Central University, Chung-Li 320, Taiwan, R.O.C. S. J. Chang, C. H. Kuo, Y. K. Su, L. W. Wu, Y. C. Lin, and W. C. Lai are with the Department of Electrical Engineering, Institute of Microelectronics, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. (e-mail: [email protected]). J. M. Tsai is with the South Epitaxy Corporation, Hsin-shi 744, Tainan County, Taiwan, R.O.C. R. K. Wu is with the Nantex Industry Corporation, Lin-Yuan 832, Kaohsiung County, Taiwan. Digital Object Identifier 10.1109/LPT.2002.805852 Fig. 1. EL spectra of phosphor converted blue, green, and red LEDs with a dc 20-mA injection current.
PY - 2003/1
Y1 - 2003/1
N2 - Phosphor-converted light-emitting diodes (LEDs) were fabricated by precoating blue/green/red phosphors onto near ultraviolate (n-UV) LED chips prior to package into LED lamps. With a 20-mA injection current, it was found that the color temperature Tc was around 5900 K and the color-rendering index Ra was around 75 for the "n-UV+blue/green/red" white LED lamps. It was also found that no changes in color temperature Tc color-rendering index Ra could be observed when we increased the injection from 20 to 60 mA. These results indicate that such "n-UV+blue/green/red" white LEDs are much more optically stable than the conventional "blue+yellow" LEDs.
AB - Phosphor-converted light-emitting diodes (LEDs) were fabricated by precoating blue/green/red phosphors onto near ultraviolate (n-UV) LED chips prior to package into LED lamps. With a 20-mA injection current, it was found that the color temperature Tc was around 5900 K and the color-rendering index Ra was around 75 for the "n-UV+blue/green/red" white LED lamps. It was also found that no changes in color temperature Tc color-rendering index Ra could be observed when we increased the injection from 20 to 60 mA. These results indicate that such "n-UV+blue/green/red" white LEDs are much more optically stable than the conventional "blue+yellow" LEDs.
UR - https://www.scopus.com/pages/publications/0037248675
UR - https://www.scopus.com/pages/publications/0037248675#tab=citedBy
U2 - 10.1109/LPT.2002.805852
DO - 10.1109/LPT.2002.805852
M3 - Article
AN - SCOPUS:0037248675
SN - 1041-1135
VL - 15
SP - 18
EP - 20
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 1
ER -