OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 17 — Aug. 16, 2010
  • pp: 18303–18311

Highly efficient hybrid light-emitting device using complex of CdSe/ZnS quantum dots embedded in co-polymer as an active layer

Byoung-Ho Kang, Jun-Seon Seo, Sohee Jeong, Jihye Lee, Chang-Soo Han, Do-Eok Kim, Kyu-Jin Kim, Se-Hyuk Yeom, Dae-Hyuk Kwon, Hak-Rin Kim, and Shin-Won Kang  »View Author Affiliations

Optics Express, Vol. 18, Issue 17, pp. 18303-18311 (2010)

View Full Text Article

Enhanced HTML    Acrobat PDF (1803 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We propose a highly efficient hybrid light-emitting device (LED) with a single active layer where CdSe/ZnS quantum dots (QDs) are dispersed as a guest material in a conjugated polymer (co-polymer) matrix used for a host material. In our structure, the QDs act on light-emitting chromophores by trapping the migrating excitons in the co-polymer matrix via Förster energy transfer, and improve the charge balance within the co-polymer by trapping the injected electron carriers. Experimental results show that the electroluminescent properties highly depend on the doping density of the QDs within the co-polymer matrix, where the luminance as well as the external current efficiency are initially enhanced with increasing the concentration of the dispersed QDs in the co-polymer solution, and then such properties are degraded due to aggregation of the QDs. We can get the maximum brightness of 9,088 cd/m2 and the maximum external current efficiency of 7.5 cd/A in mixing ratio of the QDs by 1.0 wt%. The external current efficiency is enhanced by over 15 times and the turn-on voltage is reduced in comparison with the corresponding values for a reference device that uses only a co-polymer as an active layer.

© 2010 OSA

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

ToC Category:
Optical Devices

Original Manuscript: April 19, 2010
Revised Manuscript: June 25, 2010
Manuscript Accepted: July 27, 2010
Published: August 11, 2010

Byoung-Ho Kang, Jun-Seon Seo, Sohee Jeong, Jihye Lee, Chang-Soo Han, Do-Eok Kim, Kyu-Jin Kim, Se-Hyuk Yeom, Dae-Hyuk Kwon, Hak-Rin Kim, and Shin-Won Kang, "Highly efficient hybrid light-emitting device using complex of CdSe/ZnS quantum dots embedded in co-polymer as an active layer," Opt. Express 18, 18303-18311 (2010)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. J. H. Burroughes, D. D. C. Bradley, A. R. Brown, R. N. Marks, K. Mackay, R. H. Friend, P. L. Burns, and A. B. Holmes, “Light-emitting diodes based on conjugated polymers,” Nature 347(6293), 539–541 (1990). [CrossRef]
  2. B. A. MacDonald, K. Rollins, D. MacKrron, K. Rakos, R. Eveson, K. Hashimoto, and B. Rustin, Flexible Flat Panel Display (John Wiley & Sons Ltd., 2005), Chap. 1.
  3. B. W. D’Andrade and J. J. Brown, “Organic light-emitting device luminaire for illumination applications,” Appl. Phys. Lett. 88(19), 192908 (2006). [CrossRef]
  4. M. Tian, J. Luo, and X. Liu, “Highly efficient organic light-emitting devices beyond theoretical prediction under high current density,” Opt. Express 17(24), 21370–21375 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-24-21370 . [CrossRef] [PubMed]
  5. J.-H. Lee, Y.-H. Ho, K.-Y. Chen, H.-Y. Lin, J.-H. Fang, S.-C. Hsu, J.-R. Lin, and M.-K. Wei, “Efficiency improvement and image quality of organic light-emitting display by attaching cylindrical microlens arrays,” Opt. Express 16(26), 21184–21190 (2008), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-26-21184 . [CrossRef] [PubMed]
  6. P. O. Anikeeva, J. E. Halpert, M. G. Bawendi, and V. Bulović, “Electroluminescence from a mixed red-green-blue colloidal quantum dot monolayer,” Nano Lett. 7(8), 2196–2200 (2007). [CrossRef] [PubMed]
  7. P. O. Anikeeva, C. F. Madigan, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Electronic and excitonic processes in light-emitting devices based on organic materials and colloidal quantum dots,” Phys. Rev. B 78(8), 085434 (2008). [CrossRef]
  8. J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovic, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008). [CrossRef]
  9. H. Mattoussi, L. H. Radzilowski, B. O. Dabbousi, E. L. Thomas, M. G. Bawendi, and M. F. Rubner, “Electroluminescence from heterostructures of poly(phenylene vinylene) and inorganic CdSe nanocrystals,” J. Appl. Phys. 83(12), 7965–7974 (1998). [CrossRef]
  10. Q. Sun, Y. A. Wang, L. S. Li, D. Wang, T. Zhu, J. Xu, C. Yang, and Y. Li, “Bright, multicoloured light-emitting diodes based on quantum dots,” Nat. Photonics 1(12), 717–722 (2007). [CrossRef]
  11. S. Y. Ryu, B. H. Hwang, K. W. Park, H. S. Hwang, J. W. Sung, H. K. Baik, C. H. Lee, S. Y. Song, and J. Y. Lee, “Highly efficient organic light-emitting diodes with a quantum dot interfacial layer,” Nanotechnology 20(6), 065204 (2009). [CrossRef] [PubMed]
  12. S. O. Jeon, K. S. Yook, and J. Y. Lee, “Efficiency improvement of polymer light-emitting diodes using a quantum dot interlayer between a hole transport layer and an emitting layer,” Synth. Met. 160(1-2), 39–41 (2010). [CrossRef]
  13. Z. Tan, B. Hedrick, F. Zhang, T. Zhu, J. Xu, R. H. Henderson, J. Ruzyllo, and A. Y. Wang, “Stable Binanry Complementary White Light-Emitting Diodes Based on Quantum-Dot/Polymer-Bilayer Structures,” IEEE Photon. Technol. Lett. 20(23), 1998–2000 (2008). [CrossRef]
  14. B. Torriss, A. Hache, and S. Gauvin, “White light-emitting organic device with electroluminescent quantum dots and organic molecules,” Org. Electron. 10(8), 1454–1458 (2009). [CrossRef]
  15. A. Rizzo, Y. Li, S. Kudera, F. D. Sala, M. Zanella, W. J. Parak, R. Cingolani, L. Manna, and G. Gigli, “Blue light emitting diodes based on fluorescent CdSe/ZnS nanocrystals,” Appl. Phys. Lett. 90(5), 051106 (2007). [CrossRef]
  16. C. W. Lee, C. H. Chou, J. H. Huang, C. S. Hsu, and T. P. Nguyen, “Investigations of organic light emitting diodes with CdSe(ZnS) quantum dots,” Mater. Sci. Eng. B 147(2-3), 307–311 (2008). [CrossRef]
  17. P. T. K. Chin, R. A. M. Hikmet, and R. A. J. Janssen, “Energy transfer in hybrid quantum dot light-emitting diodes,” J. Appl. Phys. 104, 013108 (2008). [CrossRef]
  18. Z. Li and H. Meng, Organic Light-Emitting Materials and Devices (Taylor & Francis, 2006), Chap 3, 4.
  19. A. M. Munro, J. A. Bardecker, M. S. Liu, Y. J. Cheng, Y. H. Niu, I. J.-L. Plante, A. K.-Y. Jen, and D. S. Ginger, “Colloidal CdSe quantum dot electroluminescence:ligands and light-emitting diodes,” Mikrochim. Acta 160(3), 345–350 (2008). [CrossRef]
  20. M. T. Fernandez-Arguelles, W. J. Jin, J. M. Costa-Fernandez, R. Pereiro, and A. Sanz-Medel, “Surface-modified CdSe quantum dots for the sensitive and selective determination of Cu(II) in aqueous solutions by luminescent measurements,” Anal. Chim. Acta 549(1-2), 20–25 (2005). [CrossRef]
  21. S. O. Jeon, C. W. Joo, K. Yook, and J. Y. Lee, “Color control of multilayer stacked white polymer light-emitting diodes using a quantum dot as an interlayer,” Appl. Phys. Lett. 94(9), 093303 (2009). [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.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited