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QLEDs for displays and solid-state lighting

  • Quantum dot light-emitting devices
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Abstract

The mainstream commercialization of colloidal quantum dots (QDs) for light-emitting applications has begun: Sony televisions emitting QD-enhanced colors are now on sale. The bright and uniquely size-tunable colors of solution-processable semiconducting QDs highlight the potential of electroluminescent QD light-emitting devices (QLEDs) for use in energy-efficient, high-color-quality thin-film display and solid-state lighting applications. Indeed, this year’s report of record-efficiency electrically driven QLEDs rivaling the most efficient molecular organic LEDs, together with the emergence of full-color QLED displays, foreshadow QD technologies that will transcend the optically excited QD-enhanced products already available. In this article, we discuss the key advantages of using QDs as luminophores in LEDs and outline the 19-year evolution of four types of QLEDs that have seen efficiencies rise from less than 0.01% to 18%. With an emphasis on the latest advances, we identify the key scientific and technological challenges facing the commercialization of QLEDs. A quantitative analysis, based on published small-scale synthetic procedures, allows us to estimate the material costs of QDs typical in light-emitting applications when produced in large quantities and to assess their commercial viability.

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Acknowledgments

This article is based on work supported by the Center for Excitonics, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award Number DE-SC0001088. K.W.S. acknowledges support from an NSF Graduate Research Fellowship.

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Authors and Affiliations

  1. Massachusetts Institute of Technology, USA

    Geoffrey J. Supran, Yasuhiro Shirasaki, Katherine W. Song, Moungi G. Bawendi & Vladimir Bulović

  2. QD Vision, USA

    Jean-Michel Caruge, Peter T. Kazlas & Seth Coe-Sullivan

  3. University of Wisconsin-Madison, USA

    Trisha L. Andrew

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  1. Geoffrey J. Supran
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Correspondence to Geoffrey J. Supran.

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Supran, G.J., Shirasaki, Y., Song, K.W. et al. QLEDs for displays and solid-state lighting. MRS Bulletin 38, 703–711 (2013). https://doi.org/10.1557/mrs.2013.181

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