Journal
OPTICS EXPRESS
Volume 20, Issue 22, Pages 25071-25076Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.025071
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A1A2007908]
- Human Resources Development the Korea Institute of Energy Technology Evaluation and Planning [20114010203050]
- Korean government Ministry of Knowledge Economy
- National Research Foundation of Korea [2012R1A1A2007908, 과C6A1901] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 (lambda(em) = 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. (C) 2012 Optical Society of America
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