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QLEDs for displays and solid-state lighting

Published online by Cambridge University Press:  12 September 2013

Geoffrey J. Supran
Affiliation:
Massachusetts Institute of Technology;[email protected]
Yasuhiro Shirasaki
Affiliation:
Massachusetts Institute of Technology;[email protected]
Katherine W. Song
Affiliation:
Massachusetts Institute of Technology;[email protected]
Jean-Michel Caruge
Affiliation:
Peter T. Kazlas
Affiliation:
Seth Coe-Sullivan
Affiliation:
Trisha L. Andrew
Affiliation:
University of Wisconsin–Madison;[email protected]
Moungi G. Bawendi
Affiliation:
Massachusetts Institute of Technology;[email protected]
Vladimir Bulović
Affiliation:
Massachusetts Institute of Technology;[email protected]
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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.

Type
Quantum dot light-emitting devices
Copyright
Copyright © Materials Research Society 2013 

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