OSA's Digital Library

Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 9 — Sep. 1, 2013
  • pp: 1468–1473

Fabrication of warm, high CRI white LED using non-cadmium quantum dots

Woo-Seuk Song, Sun-Hyoung Lee, and Heesun Yang  »View Author Affiliations

Optical Materials Express, Vol. 3, Issue 9, pp. 1468-1473 (2013)

View Full Text Article

Enhanced HTML    Acrobat PDF (1337 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We reported on the synthesis of two bright non-cadmium quantum dots (QDs) of green (512 nm)-emitting InP/ZnS and orange (583 nm)-emitting CuInS2 (CIS)/ZnS core/shell and their application for the fabrication of solid-state lighting device. The spectral overlap between absorptions from both QDs and emission from InGaN-based blue light-emitting diode (LED) chip was excellent. Thus, the efficient down-conversion of blue-to-QD emission for the generation of white light was accomplished by sequentially dispensing InP/ZnS QDs on top of CIS/ZnS ones within epoxy resin. The white QD-LED generated a high-quality white light with a high color rendering index of 90 and a warm color temperature of 3803K under a drive current of 20 mA. Drive current-dependent variations of its primary electroluminescent properties were investigated in details.

© 2013 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(250.5230) Optoelectronics : Photoluminescence
(160.4236) Materials : Nanomaterials

ToC Category:
Fluorescent and Luminescent Materials

Original Manuscript: July 26, 2013
Revised Manuscript: August 20, 2013
Manuscript Accepted: August 20, 2013
Published: August 26, 2013

Woo-Seuk Song, Sun-Hyoung Lee, and Heesun Yang, "Fabrication of warm, high CRI white LED using non-cadmium quantum dots," Opt. Mater. Express 3, 1468-1473 (2013)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. D. F. Feezell, J. S. Speck, S. P. DenBaars, and S. Nakamura, “Semipolar (2021) InGaN/GaN light-emitting diodes for high-efficiency solid-state lighting,” J. Disp. Technol.9(4), 190–198 (2013). [CrossRef]
  2. R. A. Arif, Y. K. Ee, and N. Tansu, “Polarization engineering via staggered InGaN quantum wells for radiative efficiency enhancement of light emitting diodes,” Appl. Phys. Lett.91(9), 091110 (2007). [CrossRef]
  3. S. Choi, M. H. Ji, J. Kim, H. J. Kim, M. M. Satter, P. D. Yoder, J. H. Ryou, R. D. Dupuis, A. M. Fischer, and F. A. Ponce, “Efficiency droop due to electron spill-over and limited hole injection in III−nitride visible light-emitting diodes employing lattice-matched InAlN electron blocking layers,” Appl. Phys. Lett.101(16), 161110 (2012).
  4. G. Liu, J. Zhang, C. K. Tan, and N. Tansu, “Efficiency-droop suppression by using large-bandgap AlGaInN thin barrier layers in InGaN quantum-well light-emitting diodes,” IEEE Photonics J.5(2), 2201011 (2013). [CrossRef]
  5. Y. K. Ee, P. Kumnorkaew, R. A. Arif, H. Tong, H. Zhao, J. F. Gilchrist, and N. Tansu, “Optimization of light extraction efficiency of III−nitride LEDs with self-assembled colloidal-based microlenses,” IEEE J. Sel. Top. Quantum Electron.15(4), 1218–1225 (2009). [CrossRef]
  6. P. Zhu, G. Liu, J. Zhang, and N. Tansu, “FDTD analysis on extraction efficiency of GaN light-emitting diodes with microsphere arrays,” J. Disp. Technol.9(5), 317–323 (2013). [CrossRef]
  7. J. Jewell, D. Simeonov, S. C. Huang, Y. L. Hu, S. Nakamura, J. Speck, and C. Weisbuch, “Double embedded photonic crystals for extraction of guided light in light-emitting diodes,” Appl. Phys. Lett.100(17), 171105 (2012). [CrossRef]
  8. E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater.22(28), 3076–3080 (2010). [CrossRef] [PubMed]
  9. X. Wang, W. Li, and K. Sun, “Stable efficient CdSe/CdS/ZnS core/multi-shell nanophosphors fabricated through a phosphine-free route for white light-emitting-diodes with high color rendering properties,” J. Mater. Chem.21(24), 8558–8565 (2011). [CrossRef]
  10. S. Chandramohan, B. D. Ryu, H. K. Kim, C. H. Hong, and E. K. Suh, “Trap-state-assisted white light emission from a CdSe nanocrystal integrated hybrid light-emitting diode,” Opt. Lett.36(6), 802–804 (2011). [CrossRef] [PubMed]
  11. S. Jun, J. Lee, and E. Jang, “Highly luminescent and photostable quantum dot-silica monolith and its application to light-emitting diodes,” ACS Nano7(2), 1472–1477 (2013). [CrossRef] [PubMed]
  12. K. Kim, S. Jeong, J. Y. Woo, and C. S. Han, “Successive and large-scale synthesis of InP/ZnS quantum dots in a hybrid reactor and their application to white LEDs,” Nanotechnology23(6), 065602 (2012). [CrossRef] [PubMed]
  13. J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-coated InP/ZnS nanocrystals as converter material in white LEDs,” Adv. Mater.20(21), 4068–4073 (2008). [CrossRef]
  14. S. Kim, T. Kim, M. Kang, S. K. Kwak, T. W. Yoo, L. S. Park, I. Yang, S. Hwang, J. E. Lee, S. K. Kim, and S. W. Kim, “Highly luminescent InP/GaP/ZnS nanocrystals and their application to white light-emitting diodes,” J. Am. Chem. Soc.134(8), 3804–3809 (2012). [CrossRef] [PubMed]
  15. W. S. Song and H. Yang, “Efficient white-light-emitting diodes fabricated from highly fluorescent copper indium sulfide core/shell quantum dots,” Chem. Mater.24(10), 1961–1967 (2012). [CrossRef]
  16. E. P. Jang, W. S. Song, K. H. Lee, and H. Yang, “Preparation of a photo-degradation- resistant quantum dot-polymer composite plate for use in the fabrication of a high-stability white-light-emitting diode,” Nanotechnology24(4), 045607 (2013). [CrossRef] [PubMed]
  17. W. Zhang and X. Zhong, “Facile synthesis of ZnS-CuInS2-alloyed nanocrystals for a color-tunable fluorchrome and photocatalyst,” Inorg. Chem.50(9), 4065–4072 (2011). [CrossRef] [PubMed]
  18. L. Li and P. Reiss, “One-pot synthesis of highly luminescent InP/ZnS nanocrystals without precursor injection,” J. Am. Chem. Soc.130(35), 11588–11589 (2008). [CrossRef] [PubMed]
  19. J. Lim, W. K. Bae, D. Lee, M. K. Nam, J. Jung, C. Lee, K. Char, and S. Lee, “InP@ZnSeS, core@composition gradient shell quantum dots with enhanced stability,” Chem. Mater.23(20), 4459–4463 (2011). [CrossRef]
  20. W. S. Song, J. H. Kim, J. H. Lee, H. S. Lee, Y. R. Do, and H. Yang, “Synthesis of color-tunable Cu-In-Ga-S solid solution quantum dots with high quantum yields for application to white light-emitting diodes,” J. Mater. Chem.22(41), 21901–21908 (2012). [CrossRef]
  21. H. S. Jang and D. Y. Jeon, “White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+,Li+ phosphor,” Opt. Lett.32(23), 3444–3446 (2007). [CrossRef] [PubMed]
  22. W. B. Im, N. N. Fellows, S. P. DenBaars, and R. Seshadri, “La1-x-0.025Ce0.025Sr2+xAl1-xSixO5 solid solutions as tunable yellow phosphors for solid state white lighting,” J. Mater. Chem.19(9), 1325–1330 (2009). [CrossRef]
  23. A. A. Setlur, E. V. Radkov, C. S. Henderson, J. H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater.22(13), 4076–4082 (2010). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited