期刊
ACS NANO
卷 9, 期 11, 页码 10941-10949出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b05513
关键词
quantum dot-light-emitting diode; full-color electroluminescence; efficiency; color gamut
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2013R1A2A2A01068158]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2015R1A6A1A03031833]
- Samsung Display Company, Ltd.
- National Research Foundation of Korea [2015R1A6A1A03031833, 2013R1A2A2A01068158] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Over the past few years the performance of colloidal quantum dot-light-emitting diode (QLED) has been progressively improved. However, most of QLED work has been fulfilled in the form of monochromatic device, while full-color-enabling white QLED still remains nearly unexplored. Using red, green, and blue quantum dots (QDs), herein, we fabricate bichromatic and trichromatic QLEDs through sequential solution-processed deposition of poly(9-vinlycarbazole) (PVK) hole transport layer, two or three types of QDs-mixed multilayer, and ZnO nanoparticle electron transport layer. The relative electroluminescent (EL) spectral ratios of constituent QDs in the above multicolored devices are found to inevitably vary with applied bias, leading to the common observation of an increasing contribution of a higher-band gap QD EL over low-band gap one at a higher voltage. The white EL from a trichromatic device is resolved into its primary colors through combining with color filters, producing an exceptional color gamut of 126% relative Committee (NTSC) color space that a state-of-the-art full-color organic LED counterpart cannot attain. Our trichromatic white QLED also displays the record high EL performance such as the peak values of 23 352 cd/m(2) in luminance, 21.8 cd/A in current efficiency, and 10.9% to National Television Systems in external quantum efficiency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据