Highly efficient light-emitting diodes via self-assembled InP quantum dots
Heavy-metal-free quantum dot light-emitting diodes (QLEDs) face commercialization challenges due to low efficiency and poor stability. Spin-coated quantum dot films often create charge leakage areas, limiting device performance. Here, we develop an evaporative-driven self-assembly strategy that enables the preparation of uniform and dense InP-based quantum dot films. During device operation, these films effectively suppress performance degradation caused by charge leakage. QLEDs with uniform and dense InP-based quantum dot films achieve high external quantum efficiency (26.6%) and luminance (1.4 × 10<sup>5 </sup>cd m<sup>-2</sup>), along with considerable stability (extrapolated T<sub>50</sub> lifetime of 4026 hours at 1000 cd m<sup>-2</sup>). For a 2 × 3 cm<sup>2</sup> InP-based device, the peak external quantum efficiency reaches 21.1%. By combining high-performance QLEDs with lithography technology, we fabricate miniaturized QLEDs with a minimum pixel size of 3 μm, achieving a resolution as high as 5080 pixels per inch and a peak external quantum efficiency of 22.6%.
Authors
- Yuyan Zhao (ORCID: https://orcid.org/0000-0003-2551-5425)
- Bingqiang Ji (ORCID: https://orcid.org/0000-0002-4873-7090)
- Hanfei Gao (ORCID: https://orcid.org/0000-0001-8419-2780)
- Hui Li (ORCID: https://orcid.org/0009-0005-7264-4168)
- Yuchen Wu (ORCID: https://orcid.org/0000-0002-3451-7062)
- Lei Jiang (ORCID: https://orcid.org/0000-0003-4579-728X)
- Wen Wen (ORCID: https://orcid.org/0000-0002-7646-2901)
- Jingyuan Zhang (ORCID: https://orcid.org/0009-0009-6242-2106)
- Yunjun Wang (ORCID: https://orcid.org/0000-0002-5003-3797)
Institutions
- Suzhou University of Science and Technology (CN)
- Technical Institute of Physics and Chemistry (CN)
- Nanopolis Suzhou (China) (CN)
- University of Chinese Academy of Sciences (CN)
- Shanxi Datong University (CN)
- Beihang University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-05-07
- DOI
- https://doi.org/10.1038/s41467-025-59527-2
- Citations
- 25
- Primary Topic
- Quantum Dots Synthesis And Properties
- Type
- article
- Field-Weighted Citation Impact
- 12.95
Funders
- National Natural Science Foundation of China
- Ministry of Science and Technology of the People's Republic of China
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Shanxi Province Science Foundation for Youths
- National Key Research and Development Program of China
- Youth Innovation Promotion Association