TY - GEN
T1 - White emission from CdSe/ZnSe nanoparticles combining with 400, 430 and 460nm InGaN LED
AU - Chung, Wonkeun
AU - Yu, Hong Jeong
AU - Kim, Sung Hyun
PY - 2010
Y1 - 2010
N2 - White light emitting diodes (LEDs) were fabricated combining InGaN LED chip as the excitation source and CdSe/ZnSe as the phosphor. CdSe/ZnSe nanoparticles were synthesized via wet chemical method using CdO, zinc stearate, TOPSe as precursors. 4.5 and 5.3nm diameter CdSe/ZnSe nanoparticles with emission peak at 540 and 620nm, respectively, were obtained. CdSe nanoparticle phosphors were coated onto the 460, 430 and 400nm LED chips to fabricate white LEDs. As the shorter wavelength of LED chip was applied to excitation source, the luminous efficiency of white LED was enhanced. The luminous efficiencies of 400, 430, and 460nm excitation white LEDs were 2.15, 3.96 and 6.57 lm/W, respectively at 20 mA. The corresponding CIE-1931 coordinates were (0.34, 0.30), (0.30, 0.32), and (0.31, 0.29). The color rendering index (CRI) of white LED showed similar values ; 65.1, 65.5, and 66.2.
AB - White light emitting diodes (LEDs) were fabricated combining InGaN LED chip as the excitation source and CdSe/ZnSe as the phosphor. CdSe/ZnSe nanoparticles were synthesized via wet chemical method using CdO, zinc stearate, TOPSe as precursors. 4.5 and 5.3nm diameter CdSe/ZnSe nanoparticles with emission peak at 540 and 620nm, respectively, were obtained. CdSe nanoparticle phosphors were coated onto the 460, 430 and 400nm LED chips to fabricate white LEDs. As the shorter wavelength of LED chip was applied to excitation source, the luminous efficiency of white LED was enhanced. The luminous efficiencies of 400, 430, and 460nm excitation white LEDs were 2.15, 3.96 and 6.57 lm/W, respectively at 20 mA. The corresponding CIE-1931 coordinates were (0.34, 0.30), (0.30, 0.32), and (0.31, 0.29). The color rendering index (CRI) of white LED showed similar values ; 65.1, 65.5, and 66.2.
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U2 - 10.1109/NANO.2010.5697999
DO - 10.1109/NANO.2010.5697999
M3 - Conference contribution
AN - SCOPUS:79951828690
SN - 9781424470334
T3 - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
SP - 962
EP - 965
BT - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
T2 - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
Y2 - 17 August 2010 through 20 August 2010
ER -