Super color purity green quantum dot light-emitting diodes fabricated by using CdSe/CdS nanoplatelets
Super color purity green quantum dot light-emitting diodes fabricated by using CdSe/CdS nanoplatelets
复制标题
CdSe/CdS纳米片制备的超色纯度绿色量子点发光二极管
DOI：
10.1039/c6nr02922a
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发表时间：
2016-01-01
期刊：
影响因子：
6.7
通讯作者：
Li, Lin Song
中科院分区：
文献类型：
--
作者：
Zhang, Fengjuan;Wang, Shujie;Li, Lin Song
由于其超鼻涕光致发光（PL）线路，胶体纳米板（NPLS）最近被引入了用于制造量子点发光二极管（QLED）的半导体辐射材料。在本文中，我们报告了所有解决方案加工的绿色QLED，基于胶体CDSE/CDS核/壳NPL，其狭窄的PL全宽度为半马克斯（FWHM）为12 nm。我们的表征结果表明，这种包含QLED的NPL的工作电压低2.25 V，最大亮度高达33 000 cd M（-2），峰值外部量子效率（EQE）为5％，对应于12.5 cd a（-1）。特别是，这些设备显示出具有14 nm的FWHM的电致发光（EL）的超高颜色纯度。由于在LED行业的应用中极为狭窄的EL和超纯色颜色，因此这项工作表示一类新的胶体核/壳NPLS在实现具有出色颜色饱和度的明亮有效LED中的独特潜在应用。
Colloidal nanoplatelets (NPLs) have recently been introduced as semiconductor emissive materials for the fabrication of quantum dot light-emitting diodes (QLED) on account of their ultra-narrow photoluminescence (PL) linewidth. In this paper, we report a multilayer all solution-processed green QLED based on colloidal CdSe/CdS core/shell NPLs with a narrow PL full-width-at-half-maximum (FWHM) of 12 nm. Our characterization results reveal that this kind of NPL containing QLED exhibit a low operating voltage of 2.25 V and a maximum luminance up to 33 000 cd m(-2), and peak external quantum efficiency (EQE) of 5%, corresponding to 12.5 cd A(-1) in luminance efficiency. Particularly, these devices show ultra-high color purity for electroluminescence (EL) with FWHM of 14 nm. As extremely narrow EL and ultra-pure color is highly attractive in the applications of LED industries, this work signifies the unique potential application of one new class of colloidal core/shell NPLs in achieving bright and efficient LEDs with superior color saturation.