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

Nanotechnology
Baskaran Ganesh KumarSedat Nizamoglu

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-1 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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Citations

Jul 13, 2019·Scientific Reports·Sadra SadeghiSedat Nizamoglu
Jan 17, 2021·Scientific Reports·Nema M AbdelazimRobert J Young
Jul 2, 2021·ACS Applied Materials & Interfaces·Guncem Ozgun ErenSedat Nizamoglu
Jul 19, 2018·ACS Nano·Houman Bahmani JalaliSedat Nizamoglu
Aug 10, 2019·Nano Letters·Houman Bahmani JalaliSedat Nizamoglu

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