Journal
NANOTECHNOLOGY
Volume 29, Issue 34, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aac8c9
Keywords
LED; quantum dot; synthesis; nanoparticles; lighting
Funding
- Scientific and Technological Research Council of Turkey (TUBITAK) [115E115, 115E242, 114F317, 115F451, 114E194]
- Marie Curie Career Integration Grant (PROTEINLED) [631679]
- Turkish Academy of Sciences
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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 redemitting 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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