Quantum dot light-emitting diodes (QLEDs) are promising devices for display applications. Polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) is a common hole injection layer (HIL) material in optoelectronic devices because of its high conductivity and high work function. Nevertheless, PEDOT:PSS-based QLEDs have a high energy barrier for hole injection, which results in low device efficiency. Therefore, a new strategy is needed to improve the device efficiency. Herein, we have demonstrated a bilayer-HIL using VO and a PEDOT:PSS-based QLED that exhibits an 18% external quantum efficiency (EQE), 78 cd/A current efficiency (CE), and 25,771 cd/m maximum luminance. In contrast, the PEDOT:PSS-based QLED exhibits an EQE of 13%, CE of 54 cd/A, and maximum luminance of 14,817 cd/m. An increase in EQE was attributed to a reduction in the energy barrier between indium tin oxide (ITO) and PEDOT:PSS, caused by the insertion of a VO HIL. Therefore, our results could demonstrate that using a bilayer-HIL is effective in increasing the EQE in QLEDs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsami.3c02857 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Macular Hole with an Intact Bacillary Layer.
Retina
December 2024
Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan.
Purpose: To describe the clinical characteristics of macular holes (MH) with an intact bacillary layer.
Methods: This retrospective study analyzed the characteristics and surgical results of 23 eyes with MH and an intact bacillary layer, with or without rhegmatogenous retinal detachment (RRD).
Results: Among the 23 eyes, 11 had only MH, and 12 had concurrent fovea-off RRD.
Yin-Yang Staining Technique to Create a Nonstained Internal Limiting Membrane Flap to Cover Large Idiopathic Macular Holes.
J Vitreoretin Dis
December 2024
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
To describe a modified technique for negative and positive (Yin-Yang) staining of the internal limiting membrane (ILM) to create a nonstained ILM flap that covers large idiopathic macular holes (MHs). Consecutive patients with large idiopathic MHs (>400 μm) were prospectively included in the study. After the central vitreous was removed, a droplet of triamcinolone acetonide was injected, covering the MH and surrounding area.
View Article and Find Full Text PDFIn vivo imaging and pharmacokinetics of percutaneously injected ultrasound and X-ray imageable thermosensitive hydrogel loaded with doxorubicin versus free drug in swine.
PLoS One
December 2024
Center for Interventional Oncology, Clinical Center, National Institutes of Health, Bethesda, MD, United States of America.
Intratumoral injections often lack visibility, leading to unpredictable outcomes such as incomplete tumor coverage, off-target drug delivery and systemic toxicities. This study investigated an ultrasound (US) and x-ray imageable thermosensitive hydrogel based on poloxamer 407 (POL) percutaneously delivered in a healthy swine model. The primary objective was to assess the 2D and 3D distribution of the hydrogel within tissue across three different needle devices and injection sites: liver, kidney, and intercostal muscle region.
View Article and Find Full Text PDFNon-Conjugated Gridized Nanopolymers as an Efficient Hole-Transport Material for Blue Perovskite Light-Emitting Diodes.
Small
December 2024
Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University, Xi'an, 710072, China.
Despite the remarkable advancements in perovskite light-emitting diode (PeLED) technology, the development of blue PeLEDs has lagged. The primary bottleneck lies in the difficulty of finding hole transport materials (HTMs) that can both match the energy levels of blue perovskite materials and exhibit efficient hole transport performance. Herein, a novel non-conjugated polyethylene carbazole-based polymer (P-AGCz) is developed that has excellent solution processability and serves as an efficient dopant-free HTM for PeLEDs.
View Article and Find Full Text PDFDipole Modulation Engineering Enhances Structural Order of PEDOT:PSS for Efficient and Stable InP-Based QLEDs.
ACS Appl Mater Interfaces
December 2024
School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
Indium phosphide (InP)-based quantum dot light-emitting diodes (QLEDs) are promising for future lighting and display applications due to their high color purity and brightness. However, their efficiency and stability are often limited by the disordered structure of the widely used poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), which impairs charge transport. Herein, we present a strategy to enhance the performance of InP-based QLEDs by modifying PEDOT:PSS through interfacial dipole modulation using molybdenum oxide (MoO) nanoparticles.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!