Structural control of InP/ZnS core/shell quantum dots enables high-quality white LEDs.

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ID: 264837
2018
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Abstract
Herein, we demonstrate that the structural and optical control of InP-based quantum dots (QDs) can lead to high-performance light-emitting diodes (LEDs). Zinc sulphide (ZnS) shells passivate the InP QD core and increase the quantum yield in green-emitting QDs by 13-fold and red-emitting QDs by 8-fold. The optimised QDs are integrated in the liquid state to eliminate aggregation-induced emission quenching and we fabricated white LEDs with a warm, neutral and cool-white appearance by the down-conversion mechanism. The QD-functionalized white LEDs achieve luminous efficiency (LE) up to 14.7 lm W and colour-rendering index up to 80. The structural and optical control of InP/ZnS core/shell QDs enable 23-fold enhancement in LE of white LEDs compared to ones containing only QDs of InP core.
Reference Key
kumar2018structuralnanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kumar, Baskaran Ganesh;Sadeghi, Sadra;Melikov, Rustamzhon;Aria, Mohammad Mohammadi;Jalali, Houman Bahmani;Ow-Yang, Cleva W;Nizamoglu, Sedat;
Journal Nanotechnology
Year 2018
DOI
10.1088/1361-6528/aac8c9
URL
Keywords
self-assembly biopolymer microcavity whispering gallery mode disk resonator

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