TY - JOUR
T1 - Fabrication of high color rendering index white LED using Cd-free wavelength tunable Zn doped CuInS2 nanocrystals
AU - Chung, Wonkeun
AU - Jung, Hyunchul
AU - Lee, Chang Hun
AU - Kim, Sung Hyun
PY - 2012/10/22
Y1 - 2012/10/22
N2 - Highly luminescent Cd-free Zn doped CuInS2 nanocrystals (ZCIS NCs) were synthesized, and their properties were evaluated using Xray diffraction, Raman, UV, and photoluminescence. The crystal structure of the ZCIS NCs was similar to the zinc blende, and the lattice constant decreased with increasing Zn concentration. By incorporation of Zn, the emission wavelength was tuned from 536 to 637nm with concomitant enhancement of the quantum yield up to 45%. A white light emitting diodes, integrating dual ZCIS NCs (λem = 567, and 617nm) and a 460nm InGaN LED, exhibited a high color rendering index of 84.1 with a warm color temperature of 4256.2K. The CIE-1931 chromaticity coordinates were slightly shifted from (0.3626, 0.3378) at 20mA to (0.3480, 0.3206) at 50mA.
AB - Highly luminescent Cd-free Zn doped CuInS2 nanocrystals (ZCIS NCs) were synthesized, and their properties were evaluated using Xray diffraction, Raman, UV, and photoluminescence. The crystal structure of the ZCIS NCs was similar to the zinc blende, and the lattice constant decreased with increasing Zn concentration. By incorporation of Zn, the emission wavelength was tuned from 536 to 637nm with concomitant enhancement of the quantum yield up to 45%. A white light emitting diodes, integrating dual ZCIS NCs (λem = 567, and 617nm) and a 460nm InGaN LED, exhibited a high color rendering index of 84.1 with a warm color temperature of 4256.2K. The CIE-1931 chromaticity coordinates were slightly shifted from (0.3626, 0.3378) at 20mA to (0.3480, 0.3206) at 50mA.
UR - http://www.scopus.com/inward/record.url?scp=84868249935&partnerID=8YFLogxK
U2 - 10.1364/OE.20.025071
DO - 10.1364/OE.20.025071
M3 - Article
C2 - 23187273
AN - SCOPUS:84868249935
SN - 1094-4087
VL - 20
SP - 25071
EP - 25076
JO - Optics Express
JF - Optics Express
IS - 22
ER -