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Low-cost and high-color-quality white light emitting diodes based on CdSe/ZnS quantum dots

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Abstract

Low-cost and high-color-quality white light emitting diodes (WLEDs) have been realized based on CdSe/ZnS colloidal quantum dots (QDs). CdSe/ZnS QDs with different diameters and emission wavelengths were used as phosphors and coated on the unpackaged blue InGaN/GaN LED chips, the emission of QDs and the unabsorbed LED light collectively contribute to the white light generation. Drop-coating and layer-by-layer assembly techniques were used to integrate QDs on the LED chips. Comparison of the experimental results, we found layer-by-layer assembly method with larger QDs at the bottom were the suitable method to generate controllable white light emission. Using this easy and low cost method, WLED samples were fabricated using QD mixtures with one (‘single’), or two (‘dual’) emission wavelengths. High-quality warm WLED were obtained with a correlated color temperature of CCT = 3778 K, tristimulus coordinates of (x, y) = (0.36, 0.28) and color rending index of CRI = 80.8.

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References

  1. Y. Shirasaki, G.J. Supran, M.G. Bawendi et al., Emergence of colloidal quantum-dot light-emitting technologies. Nat. Photonics 7(1), 13–23 (2013)

    Article  ADS  Google Scholar 

  2. G.M. Farinola, R. Ragni, Electroluminescent materials for white organic light emitting diodes. Chem. Soc. Rev. 40(7), 3467–3482 (2011)

    Article  Google Scholar 

  3. A.L. Rogach, N. Gaponik, J.M. Lupton et al., Light‐emitting diodes with semiconductor nanocrystals. Angew. Chem. Int. Ed. 47(35), 6538–6549 (2008)

    Article  Google Scholar 

  4. Y. Li, A. Rizzo, R. Cingolani et al., White-light-emitting diodes using semiconductor nanocrystals. Microchim. Acta 159(4), 207–215 (2007)

    Article  Google Scholar 

  5. Q. Zhang, C.F. Wang, L.T. Ling et al., Fluorescent nanomaterial-derived white light-emitting diodes: what’s going on. J. Mater. Chem. C 2(22), 4358–4373 (2014)

    Article  Google Scholar 

  6. M.R. Krames, O.B. Shchekin, R. Mueller-Mach et al., Status and future of high-power light-emitting diodes for solid-state lighting. J. Disp. Technol. 3(2), 160–175 (2007)

    Article  ADS  Google Scholar 

  7. T.H. Thanh, Q.V. Lam, T.H. Nguyen et al., Performance of CdS/CdSe/ZnS quantum dot-sensitized TiO2 mesopores for solar cells. Chin. Opt. Lett. 11(7), 4 (2013). Article ID072501

    Google Scholar 

  8. M.A. Hossain, J.R. Jennings, Z.Y. Koh et al., Carrier generation and collection in CdS/CdSe-sensitized SnO2 solar cells exhibiting unprecedented photocurrent densities. ACS Nano 5(4), 3172–3181 (2011)

    Article  Google Scholar 

  9. T.H. Thanh, D.H. Thanh, V.Q. Larn, The CdS/CdSe/ZnS photoanode cosensitized solar cells basedon Pt, CuS, Cu2S, and PbS counter electrodes. Adv. OptoElectron. 2014, 9 (2014). Article ID 397681

    Article  Google Scholar 

  10. Y.T. Li, L. Wei, R.Z. Zhang et al., Annealing effect on photovoltaic performance of CdSe quantum-dots-sensitized TiO2 nanorod solar cells. J. Nanomater. 2012, 6 (2012). Article ID 103417

    Google Scholar 

  11. Y. Chen, J. Herrnsdorf, B. Guilhabert et al., Colloidal quantum dot random laser. Opt. Express 19(4), 2996–3003 (2011)

    Article  ADS  Google Scholar 

  12. D. Amarasinghe, A. Ruseckas, G.A. Turnbull et al., Organic semiconductor optical amplifiers. Proc. IEEE 97(9), 1637–1650 (2009)

    Article  Google Scholar 

  13. T.H. Kim, K.S. Cho, E.K. Lee et al., Full-colour quantum dot displays fabricated by transfer printing. Nat. Photonics 5, 176–182 (2011)

    Article  ADS  Google Scholar 

  14. K.J. Chen, H.C. Chen, K.A. Tsai et al., Resonant-enhanced full-color emission of quantum-dot-based display technology using a pulsed spray method. Adv. Funct. Mater. 22, 5138–5143 (2012)

    Article  Google Scholar 

  15. K.J. Chen, H.C. Chen, M.H. Shih et al., The influence of the thermal effect on CdSe/ZnS quantum dots in light-emitting diodes. IEEE J. Lightwave Technol. 30(14), 2256–2261 (2012)

    Article  ADS  Google Scholar 

  16. H. Wang, K.S. Lee, J.H. Ryu et al., White light emitting diodes realized by using an active packaging method with CdSe/ZnS quantum dots dispersed in photosensitive epoxy resins. Nanotechnology 19(14), 5 (2008). Article ID145202

    Google Scholar 

  17. J.D. Gosnell, S.J. Rosenthal, S.M. Weiss, White light emission characteristics of polymer-encapsulated CdSe nanocrystal films. IEEE Photonic Technol. Lett. 22, 541–543 (2010)

    Article  ADS  Google Scholar 

  18. H. Jung, W. Chung, C.H. Lee et al., Fabrication of white lightemitting diodes based on UV light-emitting diodes with conjugated polymers-(CdSe/ZnS) quantum dots as hybrid phosphors. J. Nanosci. Nanotechnol. 12, 5407–5411 (2012)

    Article  Google Scholar 

  19. C. Cheng, X.F. Peng, Spectral characteristics of a quantum-dot (CdSe/ZnS)-doped fiber in low concentrations. IEEE J. Lightwave Technol. 27(10), 1362–1368 (2009)

    Article  ADS  Google Scholar 

  20. S. Nizamoglu, G. Zengin, H.V. Demir, Color-converting combinations of nanocrystal emitters for warm-white light generation with high color rendering index. Appl. Phys. Lett. 92, 031102–031103 (2008)

    Article  ADS  Google Scholar 

  21. L. Qu, X.G. Peng, Control of photoluminescence properties of CdSe nanocrystals in growth. J. Am. Chem. Soc. 124(9), 2049–2055 (2002)

    Article  Google Scholar 

  22. A.Y. Nazzal, X. Wang, L. Qu et al., Environmental effects on photoluminescence of highly luminescent CdSe and CdSe/ZnS core/shell nanocrystals in polymer thin films. J. Phys. Chem. B 108(18), 5507–5515 (2004)

    Article  Google Scholar 

  23. J.Y. Tsao, Solid-state lighting lamps, chips, and materials for tomorrow. Circ. Devices Mag. 20(3), 28–37 (2004)

    Article  Google Scholar 

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Acknowledgments

This work was financially supported by Foundation of ZheJiang Educational Committee (No.Y201430465), School Foundation of NingBo University (No. XYL13001) and the Twelfth Five-Year Plan of Zhejiang province key discipline-computer application technology (No.20121114).

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  1. College of Science & Technology, NingBo University, NingBo, 315212, China

    Xuefeng Peng

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  1. Xuefeng Peng
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Peng, X. Low-cost and high-color-quality white light emitting diodes based on CdSe/ZnS quantum dots. J Opt 44, 249–254 (2015). https://doi.org/10.1007/s12596-015-0253-x

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