Oxygen Vacancy Formation in ZnSeTe Blue Quantum Dot Light-Emitting Diodes
Recent advancements have led to the development of bright and heavy metal-free blue-emitting quantum dot light-emitting diodes (QLEDs). However, consensus understanding of their distinct photophysical and electroluminescent dynamics remains elusive. This work correlates the chemical and electronic changes occurring in a QLED during operation using depth-resolved and operando techniques. The results indicate that oxygen vacancies form in the ZnMgO layer during operation, with important implications on the charge injection and electrochemical dynamics. Taken together, the results suggest a causal relationship between oxygen vacancy formation and operational degradation of the blue-emitting ZnSeTe-based QLEDs.
Authors
- Jeonghun Kwak (ORCID: https://orcid.org/0000-0002-4037-8687)
- Tanguy Terlier (ORCID: https://orcid.org/0000-0002-4092-0771)
- Jonah R. Horowitz (ORCID: https://orcid.org/0000-0002-8584-1751)
- Seung‐Gu Choi
- Shaun Wee Kiat Tan (ORCID: https://orcid.org/0000-0002-0444-6777)
- Heejae Chung (ORCID: https://orcid.org/0000-0001-5436-3753)
- Vladimir Bulović (ORCID: https://orcid.org/0000-0002-0960-2580)
- Taehyung Kim (ORCID: https://orcid.org/0000-0002-7367-4941)
- Jin‐Wook Lee (ORCID: https://orcid.org/0000-0002-0170-8620)
- Sujin Park (ORCID: https://orcid.org/0009-0007-7192-3389)
- Ruiqi Zhang (ORCID: https://orcid.org/0000-0003-3901-8737)
- Moungi G. Bawendi (ORCID: https://orcid.org/0000-0003-2220-4365)
- Oliver J. Tye (ORCID: https://orcid.org/0009-0006-9175-313X)
Institutions
- Semiconductor Research Corporation (US)
- Seoul National University (KR)
- Samsung (South Korea) (KR)
- Institute of Nanotechnology (GB)
- Renewable Energy Systems (United States) (US)
- Institute of Professional Innovations (RU)
- Sustainable Energy Systems (United Kingdom) (GB)
- Massachusetts Institute of Technology (US)
- Rice University (US)
- Sungkyunkwan University (KR)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2025-10-22
- DOI
- https://doi.org/10.1021/jacs.5c13973
- Primary Topic
- Quantum Dots Synthesis And Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.00