Anionic Condensation-Guided Synthesis of LaSi <sub>2</sub> N <sub>3</sub> O: A “Missing” Structure in the Ln–Si–N–O Series of Oxonitridosilicate Phosphor Materials
The development of innovative luminescent materials for lighting and display applications is an important research field. In this work, we have employed an anionic condensation approach to discover a novel oxonitridosilicate synthesized via Li metal flux. LaSi2N3O crystallizes in the orthorhombic space group Pna21 (a = 7.82609(6), b = 18.24908(15), and c = 4.86567(5) Å) with a structure consisting of [Si6N12O2] ribbons cross-linked by [SiN3O] tetrahedra. This follows previously reported structural rules for a series of condensed rare-earth oxonitridosilicates, and discovery of this relatively simple composition verifies the design principles. Ce3+-doped LaSi2N3O is a highly efficient blue phosphor with peak emission at 450 nm under 390 nm excitation and a quantum yield of 72.0% and demonstrates strong potential for near-UV phosphor applications.
Authors
- Zu-pei Yang
- Zheng Lin-jing
- Hongmei Jing (ORCID: https://orcid.org/0000-0003-4958-2489)
- Xiaoming Wang (ORCID: https://orcid.org/0000-0002-1527-3496)
- Chen‐Chen Cao (ORCID: https://orcid.org/0009-0008-0924-3582)
- Yi-Xiang Wang (ORCID: https://orcid.org/0000-0002-4021-4228)
- J. Paul Attfield
- Huan Jiao (ORCID: https://orcid.org/0000-0001-8613-4744)
- Jiang-Bo Lu
- Leiming Fang (ORCID: https://orcid.org/0000-0001-5256-579X)
Institutions
- China Academy of Engineering Physics (CN)
- Joint Laboratory for Extreme Conditions Matter Properties (CN)
- Advanced Energy (United States) (US)
- Institute of Macromolecular Chemistry (UA)
- Shaanxi Normal University (CN)
- University of Edinburgh (GB)
Publication Details
- Journal
- Chemistry of Materials
- Published
- 2026-05-23
- DOI
- https://doi.org/10.1021/acs.chemmater.6c00409
- Primary Topic
- Luminescence Properties of Advanced Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Engineering and Physical Sciences Research Council
- Chinese Government Scholarship
- Fundamental Research Funds for the Central Universities