Efficient White LEDs Using Liquid-state Magic-sized CdSe Quantum Dots

被引：39
|
作者：
Sadeghi, Sadra [1 ]
Abkenar, Sirous Khabbaz [2 ]
Ow-Yang, Cleva W. [2 ]
Nizamoglu, Sedat [1 ,3 ]
机构：
[1] Koc Univ, Grad Sch Mat Sci & Engn, TR-34450 Istanbul, Turkey
[2] Sabanci Univ, Dept Engn & Nat Sci, TR-34956 Istanbul, Turkey
[3] Koc Univ, Dept Biomed Sci & Engn, TR-34450 Istanbul, Turkey
来源：
SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期
关键词：
LIGHT-EMITTING-DIODES; SEMICONDUCTOR NANOCRYSTALS; EMISSION; ULTRASMALL; PHOTOLUMINESCENCE; NANOCLUSTERS; GROWTH;
D O I：
10.1038/s41598-019-46581-2
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 color-rendering index and luminous efficiency up to 89 and 11.7 lm/W, respectively.
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页数：9
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