Hybrid remote quantum dot/powder phosphor designs for display backlights

Light, Science & Applications
Sofie AbePhilippe F Smet

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 di...Continue Reading

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Citations

Sep 7, 2018·Advanced Materials·Samuel D StranksFelix Deschler
Jan 24, 2019·Advanced Materials·Yun-Fei LiQibing Pei
Apr 26, 2017·Nature Materials·Philippe F Smet, Jonas J Joos
Apr 10, 2020·Chemical Communications : Chem Comm·Qiang ZhangYuhua Wang
Jul 3, 2020·Small·Bing ChenFeng Wang
Aug 5, 2017·Materials·David Van der HeggenPhilippe F Smet
Mar 18, 2017·Physical Chemistry Chemical Physics : PCCP·Jonas J JoosPhilippe F Smet
May 16, 2020·Light, Science & Applications·Zhaojun LiuJr-Hau He
Jul 10, 2020·Nanomaterials·Yu-Ming HuangHao-Chung Kuo
May 12, 2021·Light, Science & Applications·Zhaojun LiuJr-Hau He
Jul 21, 2021·The Journal of Physical Chemistry Letters·Byung-Ryool HyunHao-Chung Kuo
Oct 11, 2019·ACS Applied Materials & Interfaces·Zibo LiYumeng Shi
Jun 29, 2018·The Journal of Physical Chemistry Letters·Gabriel Lozano
Oct 5, 2019·ACS Nano·Dmitry N DirinMaksym V Kovalenko
May 12, 2018·ACS Applied Materials & Interfaces·Reinert VerstraetePhilippe F Smet
Jun 28, 2019·The Journal of Physical Chemistry Letters·Dan QuZaicheng Sun

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Methods Mentioned

BETA
transmission electron microscopy
X-ray

Software Mentioned

CQS

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