使用液态超小尺寸CdSe量子点的高效白光发光二极管
Efficient White LEDs Using Liquid-state Magic-sized CdSe Quantum Dots.
作者信息
Sadeghi Sadra, Khabbaz Abkenar Sirous, Ow-Yang Cleva W, Nizamoglu Sedat
机构信息
Graduate School of Materials Science and Engineering, Koc University, 34450, Istanbul, Turkey.
Department of Engineering and Natural Sciences, Sabanci University, Istanbul, 34956, Turkey.
出版信息
Sci Rep. 2019 Jul 11;9(1):10061. doi: 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 color-rendering index and luminous efficiency up to 89 and 11.7 lm/W, respectively.
魔点簇已引起人们极大的兴趣，以探索量子点（QD）成核和生长的动力学。同时，CdSe 魔尺寸量子点在可见波长区域呈现宽带发射，这有利于实现单一类型纳米材料的简单集成以及白光发光二极管（LED）的高显色能力。在此，我们通过控制合成参数，在没有任何壳层包覆或后处理过程的情况下，将魔尺寸 CdSe 量子点的量子产率优化至 22%，并将它们以液态形式集成到蓝色 LED 上，以防止由于主体材料效应导致的效率下降。所制备的白光 LED 的显色指数和发光效率分别高达 89 和 11.7 lm/W。
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