Structural control of InP/ZnS core/shell quantum dots enables high-quality white LEDs.
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ID: 264837
2018
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.
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kumar2018structuralnanotechnology
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| 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 |
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