Hybrid remote quantum dot/powder phosphor designs for display backlights

Sofie Abe; Jonas J Joos; Lisa IDJ Martin; Zeger Hens; Philippe F Smet

doi:10.1038/lsa.2016.271

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Hybrid remote quantum dot/powder phosphor designs for display backlights

Original Articles

- Hybrid remote quantum dot/powder phosphor designs for display backlights
- Light: Science & Applications Vol. 6, Issue 2, (2017)
- Affiliations：
  
  1.Department of Inorganic and Physical Chemistry, Ghent University, Gent, Belgium
  2.Department of Solid State Sciences, LumiLab, Ghent University, Gent, Belgium
  3.Center for Nano and Biophotonics, Ghent University, Gent, Belgium
- Author bio：
  
  Z Hens, Email: zeger.hens@ugent.be
  PF Smet, Email: philippe.smet@ugent.be
- Funds：
- DOI：10.1038/lsa.2016.271
  CLC：
- Published：2017-06，
  
  Published Online：09 December 2016，
  
  Received：18 July 2016，
  
  Revised：05 December 2016，
  
  Accepted：07 December 2016
- Accepted：
Scan QR Code
Abe, S. et al. Hybrid remote quantum dot/powder phosphor designs for display backlights. Light: Science & Applications, 6, e16271 (2017).
DOI：

Abe, S. et al. Hybrid remote quantum dot/powder phosphor designs for display backlights. Light: Science & Applications, 6, e16271 (2017). DOI： 10.1038/lsa.2016.271.

摘要

Abstract

Quantum dots are ideally suited for color conversion in light emitting diodes owing to their spectral tunability

high conversion efficiency and narrow emission bands. These properties are particularly important for display backlights; the highly saturated colors generated by quantum dots justify their higher production cost. Here

we demonstrate the benefits of a hybrid remote phosphor approach that combines a green-emitting europium-doped phosphor with red-emitting CdSe/CdS core/shell quantum dots. Different stacking geometries

including mixed and separate layers of both materials

are studied at the macroscopic and microscopic levels to identify the configuration that achieves maximum device efficiency while minimizing material usage. The influence of reabsorption

optical outcoupling and refractive index-matching between the layers is evaluated in detail with respect to device efficiency and cost. From the findings of this study

general guidelines are derived to optimize both the cost and efficiency of CdSe/CdS and other (potentially cadmium-free) quantum dot systems. When reabsorption of the green and/or red emission is significant compared to the absorption strength for the blue emission of the pumping light emitting diode

the hybrid remote phosphor approach becomes beneficial.

关键词

Keywords

cost-efficiencylanthanidelight emitting diodenanocrystalremote phosphor

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