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JIE LIU1, ZHAN-CHAO WU1,* , SHAO-PING KUANG1
A white-light-emitting diode (WLED) was fabricated by precoating blue/yellow phosphors onto a near ultraviolet (NUV) LED chip. When the WLED operated under a direct current (DC) of 20 mA at room temperature, the color temperature Tc, the color-rendering index Ra, and the Commission Internationale de I’Eclairage chromaticity coordinate (x, y) are calculated to be 5998 K, 90.3 and (0.3253, 0.2822), respectively. With increasing DC from 10 to 40 mA, both the coordinates x and y of the WLED trend to decrease slightly, and consequently the Ra and the Tc decreases and increases, respectively. Compared with conventional “blue chip + yellow phosphor (YAG)” WLED, the “NUV chip + blue/yellow phosphor” WLED shows higher Ra..
Color-rendering index (Ra), Color temperature (Tc), White-light-emitting diode (WLED).
JIE LIU, ZHAN-CHAO WU, SHAO-PING KUANG, White light from NUV InGaN LED chip precoated with blue/yellow phosphors, Optoelectronics and Advanced Materials - Rapid Communications, 7, 5-6, May-June 2013, pp.343-345 (2013).
Submitted at: Oct. 15, 2012
Accepted at: June 12, 2013
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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