Efficient white LEDs using liquid-state magic-sized CdSe quantum dots
Sadeghi, Sadra and Khabbaz Abkenar, Sirous and Ow-Yang, Cleva W. and Nizamoğlu, Sedat (2019) Efficient white LEDs using liquid-state magic-sized CdSe quantum dots. Scientific Reports, 9 . ISSN 2045-2322
Official URL: http://dx.doi.org/10.1038/s41598-019-46581-2
Magic clusters have attracted significant interest to explore the dynamics of quantum dot (QD) nucleation and growth. At the same time, CdSe magic-sized QDs reveal broadband emission in the visible wavelength region, which advantageously offer simple integration of a single-type of nanomaterial and high color rendering ability for white light-emitting diodes (LEDs). Here, we optimized the quantum yield of magic-sized CdSe QDs up to 22% via controlling the synthesis parameters without any shelling or post-treatment process and integrated them in liquid-state on blue LED to prevent the efficiency drop due to host-material effect. The fabricated white LEDs showed colorrendering index and luminous efficiency up to 89 and 11.7 lm/W, respectively.
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