X-Type Ligands Effect on the Operational Stability of Heavy-Metal-Free Quantum Dot Light-Emitting Diodes
ZnSeTe quantum dots (QDs) offer an efficient avenue for realizing heavy-metal-free light-emitting diodes (LEDs) that meet the Rec.2100 blue standard. Synthetic core-shell engineering has enabled big advances in the external quantum efficiency (EQE) of ZnSeTe QD-LEDs. However, the mechanisms behind the degradation of the operational stability of ZnSeTe QD-LEDs remain relatively unexplored. In this study, we explore the impact of ligand density and composition on both material and device stability. We developed a solid-film ligand exchange utilizing an inorganic X-type ligand (zinc chloride), revealing that the substitution of inorganic ligands for organic counterparts significantly influences the stability of both materials and devices.
Authors
- Liang‐Sheng Liao (ORCID: https://orcid.org/0000-0002-2352-9666)
- Weizhi Liu (ORCID: https://orcid.org/0000-0001-9841-1999)
- Wen-Long Fei
- Shengming Li (ORCID: https://orcid.org/0009-0009-6834-1083)
- Qiao Zhang (ORCID: https://orcid.org/0000-0001-9682-3295)
- Song Chen (ORCID: https://orcid.org/0000-0001-8225-7560)
- Ya‐Kun Wang (ORCID: https://orcid.org/0000-0002-8970-6856)
- Jiachen Xie
- Sheng‐Nan Li
Institutions
- Macau University of Science and Technology (MO)
- Soochow University (CN)
- Institute of Molecular Functional Materials (CN)
- Advanced Materials and Devices (United States) (US)
- Macao Polytechnic University (MO)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1021/acs.nanolett.4c04032
- Citations
- 17
- Primary Topic
- Quantum Dots Synthesis And Properties
- Type
- article
- Field-Weighted Citation Impact
- 1.99
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Higher Education Discipline Innovation Project