Skip to main content

Advertisement

SpringerLink
Log in

Enhanced color-conversion efficiency between colloidal quantum dot-phosphors and nitride LEDs by using nano-patterned p-GaN

  • Published:
Journal of Electroceramics Aims and scope Submit manuscript

Abstract

We have demonstrated that color-conversion efficiency can be enhanced through the use of non-radiative energy transfer between CdSe/ZnS core/shell colloidal quantum dots(QDs) and nitride multi-quantum well(MQW) in light emitting diodes(LEDs) having nano-patterned p-GaN. The nitride LEDs having nano-patterned p-GaN were fabricated by selective deep etching of p-GaN by using self-assembled ITO nano-dots as a etch mask. For comparison, we also fabricated the nitride LEDs having groove-etched p-GaN as well as the LEDs having a normal p-GaN layer. The results show that the LEDs having nano-patterned p-GaN showed the higher color conversion efficiency of 15.5 % and the improved effective internal quantum efficiency of 71 %. The enhanced efficiency can be attributed to sufficient close QD-MQW separation due to deep etching of p-GaN by using nano-patterning, which resulted in faster energy transfer rate of 2.47 ns−1 for non-radiative QD-MQW energy-transfer.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

  1. V.L. Colvin, M.C. Schlamp, A.P. Alivisatos, Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer. Nature 370, 354 (1994)

    Google Scholar 

  2. S. Coe, W.K. Woo, M. Bawendi, V. Bulovic, Electroluminescence from single monolayers of nanocrystals in molecular organic devices. Nature 420, 800 (2002)

    Google Scholar 

  3. J.M. Caruge, J.E. Halpert, V. Wood, V. Bulovic, M.G. Bawendi, Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers. Nat. Photonics 2, 247 (2008)

  4. S.V. Kershaw, M. Harrison, A.L. Rogach, A. Kornowski, Development of IR-emitting colloidal II-VI quantum-dot materials. IEEE Quant. Electron. 6, 534 (2000)

    Google Scholar 

  5. S.C. Sullivan, W.-K. Woo, J.S. Steckel, M. Bawendi, V. Bulovi, Tuning the performance of hybrid organic/inorganic quantum dot light-emitting devices. Org. Electron. 4, 123 (2003)

    Google Scholar 

  6. J. Hill, S.Y. Heriot, O. Worsfold, T.H. Richardson, A.M. Fox, D.D.C. Bradley, Controlled Förster energy transfer in emissive polymer Langmuir-Blodgett structures. Phys. Rev. B 69, 041303 (2004)

    Google Scholar 

  7. Q. Sun, Y.A. Wang, S.L. Lin, D. Wang, T. Zhu, J. Xu, C. Yang, Y. Li, Bright, multicoloured light-emitting diodes based on quantum dots. Nat. Photonics 1, 717 (2007)

    Article  Google Scholar 

  8. M. Achermann, M.A. Petruska, S. Kos, D.L. Smith, D.D. Koleske, V.I. Klimov, Energy-transfer pumping of semiconductor nanocrystals using an epitaxial quantum well. Nature 429, 642 (2004)

    Article  Google Scholar 

  9. T. Förster, Zwischenmolekulare Energiewanderung und Fluoreszenz. Ann. Phys. 437, 55 (1948)

    Article  Google Scholar 

  10. M. Achermann, M.A. Petruska, D.D. Koleske, M.H. Crawford, V.I. Klimov, Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversion. Nano Lett. 6, 1396 (2006)

    Article  Google Scholar 

  11. S. Nizamoglu, E. Sari, J.H. Baek, I.H. Lee, H.V. Demir, White light generation by resonant nonradiative energy transfer from epitaxial InGaN/GaN quantum wells to colloidal CdSe/ZnS core/shell quantum dots. New J. Phys. 10, 123001 (2008)

    Article  Google Scholar 

  12. S. Chanyawadee, P.G. Lagoudakis, R.T. Harley, M.D.B. Charlton, D.V. Talapin, H.W. Huang, C.H. Lin, Increased color-conversion efficiency in hybrid light-emitting diodes utilizing non-radiative energy transfer. Adv. Mater. 22, 602 (2010)

    Article  Google Scholar 

  13. M.J. Park, J.S. Kwak, InGaN-based nano-pillar light emitting diodes fabricated by self-assembled ITO nano-dots. J. Nanosci. Nanotechnol. 12, 4265 (2012)

    Article  Google Scholar 

  14. F. Zhang, J. Liu, G. You, C. Zhang, S.E. Mohney, M.J. Park, J.S. Kwak, Y. Wang, D.D. Koleske, J. Xu, Nonradiative energy transfer between colloidal quantum dot-phosphors and nanopillar nitride LEDs. Opt. Express 20, A333 (2012)

    Article  Google Scholar 

Download references

Acknowledgments

This work was supported in part by the Industrial Technology Development Program funded by the Ministry of Knowledge Economy (MKE, Korea), by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011–0017325), and by BK21 PLUS at SCNU.

Author information

Authors and Affiliations

  1. Department of Printed Electronics Engineering, Sunchon National University, Jeonnam, South Korea

    Min Joo Park & Joon Seop Kwak

  2. School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan, South Korea

    Kyoung Jin Choi

Authors
  1. Min Joo Park
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kyoung Jin Choi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Joon Seop Kwak
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Joon Seop Kwak.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Park, M.J., Choi, K.J. & Kwak, J.S. Enhanced color-conversion efficiency between colloidal quantum dot-phosphors and nitride LEDs by using nano-patterned p-GaN. J Electroceram 33, 2–6 (2014). https://doi.org/10.1007/s10832-014-9892-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10832-014-9892-6

Keywords

Search

Navigation