Indium phosphide (InP) is a representative of environmentally friendly quantum dots (QDs), and quantum dot light-emitting diodes (QLEDs) based on InP QDs are prime candidates for next-generation display applications. However, there are numerous nonradiative sites on the surface of InP QDs, which compromise the operational stability of QLEDs. Herein, we employed cysteamine (CTA) molecules for post-treatment of QD films, effectively passivating surface defects and nonradiative sites, thereby enhancing stability. This treatment enabled a long lifetime of over 1,200 h at an initial luminance of 1,000 cd m. Additionally, CTA-treated QDs induced the formation of an interface dipole, elevating the energy levels of QDs and reducing the injection barrier for holes. Moreover, the dipole moment at the interface hindered electron injection, achieving a more balanced carrier injection in the device. Consequently, we achieved a peak external quantum efficiency (EQE) of 21.21%.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.nanolett.4c04580 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Highly Efficient Blue Light-Emitting Diodes Enabled by Gradient Core/Shell-Structured Perovskite Quantum Dots.
ACS Nano
January 2025
MIIT Key Laboratory of Advanced Display Materials and Devices, Jiangsu Province Engineering Research Center of Quantum Dot Display, School of Materials Science and Engineering, Institute of Optoelectronics & Nanomaterials, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
Room temperature (RT) synthesized mixed bromine and chlorine CsPbBrCl perovskite quantum dots (Pe-QDs) offer notable advantages for blue quantum dot light-emitting diodes (QLEDs), such as cost-effective processing and narrow luminescence peaks. However, the efficiency of blue QLEDs using these RT-synthesized QDs has been limited by inferior crystallinity and deep defect presence. In this study, we demonstrate a precise approach to constructing high-quality gradient core-shell (CS) structures of CsPbBrCl QD through anion exchange.
View Article and Find Full Text PDFFlexible Site-Specific Labeling-Mediated Self-Assembly Sensor Based on Quantum Dots and LUMinescent AntiBody Sensor for Duplexed Detection of Antibodies.
ACS Sens
January 2025
Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China.
Over recent years, the LUMinescent AntiBody Sensor (LUMABS) system, utilizing bioluminescence resonance energy transfer (BRET), has emerged as a highly effective method for antibody detection. This system incorporates NanoLuc (Nluc) as the donor and fluorescent protein (FP) as the acceptor. However, the limited Stokes shift of FP poses a challenge, as it leads to significant spectral cross-talk between the excitation and emission spectra.
View Article and Find Full Text PDFA Magnetic Photocatalytic Composite Derived from Waste Rice Noodle and Red Mud.
Nanomaterials (Basel)
December 2024
College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China.
This study is the first to convert two waste materials, waste rice noodles (WRN) and red mud (RM), into a low-cost, high-value magnetic photocatalytic composite. WRN was processed via a hydrothermal method to produce a solution containing carbon quantum dots (CQDs). Simultaneously, RM was dissolved in acid to form a Fe ion-rich solution, which was subsequently mixed with the CQDs solution and underwent hydrothermal treatment.
View Article and Find Full Text PDFNew Strategy for Microbial Corrosion Protection: Photocatalytic Antimicrobial Quantum Dots.
Nanomaterials (Basel)
December 2024
Hebei Short Process Steelmaking Technology Innovation Center, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
Microbial corrosion has significant implications for the economy, environment, and human safety worldwide. Photocatalytic antibacterial technology, owing to its advantages in environmental protection, broad-spectrum, and efficient sterilization, presents a compelling alternative to traditional antibacterial strategies for microbial corrosion protection. In recent years, photocatalytic quantum dot materials have garnered considerable attention in this field due to their unique quantum effects.
View Article and Find Full Text PDFLayered double hydroxide modified bismuth vanadate as an efficient photoanode for enhancing photoelectrochemical water splitting.
Mater Horiz
January 2025
Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, 441-8580, Aichi, Japan.
Photoelectrochemical (PEC) water splitting has attracted significant interest as a promising approach for producing clean and sustainable hydrogen fuel. An efficient photoanode is critical for enhancing PEC water splitting. Bismuth vanadate (BiVO) is a widely recognized photoanode for PEC applications due to its visible light absorption, suitable valence band position for water oxidation, and outstanding potential for modifications.
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!