中文版 | English
Title

ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%

Author
Corresponding AuthorChen,Shuming
Publication Years
2022
DOI
Source Title
ISSN
1998-0124
EISSN
1998-0000
Abstract
ZnSeTe blue Cd-free quantum dot (QD) has emerged as a promising emitter for display applications due to its nontoxicity, tunable wavelength, and high efficiency. However, ZnSeTe-based quantum-dot light-emitting diodes (QLEDs) usually exhibit unsaturated emissions with broad spectra. Herein, a top-emitting structure, equipped with a transparent indium-zinc-oxide (IZO) top electrode and an IZO phase tuning layer (PTL), is developed to modulate the emission spectra and the efficiency of the devices. Saturated blue emissions with color coordinates beyond Recommendation ITU-R BT.709 (Rec.709) and near Rec.2020 standards are achieved. Moreover, benefiting from the improved outcoupling efficiency and the enhanced charge balance, the top-emitting QLED demonstrates a high external quantum efficiency of 15.14%, which is further improved to 18.16% by capping the devices with SiO nanospheres. Simulation analysis reveals that the surface plasmon polariton (SPP) losses are effectively reduced by applying a 100 nm PTL, leading to an outcoupling efficiency of 41.2% at a wavelength of 478 nm. Due to the simultaneously enhanced color saturation and efficiency, a high chroma efficiency (current efficiency/y coordinate in Commission Internationale de l’Eclairage chart) of 123 is obtained. The developed top-emitting architecture could enable the realization of efficient and saturated QLEDs for wide color gamut high-definition display applications. [Figure not available: see fulltext.].
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China[62174075] ; Shenzhen Science and Technology Program["JCYJ20210324105400002","JCYJ20220530113809022"] ; Guangdong University Research Program[2020ZDZX3062]
WOS Research Area
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Accession No
WOS:000882354400005
Publisher
EI Accession Number
20224613106810
EI Keywords
Color ; Electromagnetic wave polarization ; Emission spectroscopy ; II-VI semiconductors ; Nanocrystals ; Organic light emitting diodes (OLED) ; Quantum efficiency ; Refractive index ; Silica ; Surface plasmon resonance ; Zinc oxide
ESI Classification Code
Electromagnetic Waves:711 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Inorganic Compounds:804.2 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1
Scopus EID
2-s2.0-85141737416
Data Source
Scopus
Citation statistics
Cited Times [WOS]:4
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/411867
DepartmentDepartment of Electrical and Electronic Engineering
Affiliation
Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
First Author AffilicationDepartment of Electrical and Electronic Engineering
Corresponding Author AffilicationDepartment of Electrical and Electronic Engineering
First Author's First AffilicationDepartment of Electrical and Electronic Engineering
Recommended Citation
GB/T 7714
Yuan,Cuixia,Tian,Fengshou,Chen,Shuming. ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%[J]. Nano Research,2022.
APA
Yuan,Cuixia,Tian,Fengshou,&Chen,Shuming.(2022).ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%.Nano Research.
MLA
Yuan,Cuixia,et al."ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%".Nano Research (2022).
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