Near infrared luminescence enhancement of Fe3+-doped MgGa2O4 phosphor by Li+-Assisted oxygen vacancy repair strategy

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-06-01 Epub Date: 2025-04-08 DOI:10.1016/j.optmat.2025.117034

Kewen Zhou , Li Zhou , Weilong Chen , Xiaojun Yin , Hao Lin , Chunhong Gao , Shusheng Pan

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Abstract

Fe³⁺-doped MgGa₂O₄ (MGO: Fe³⁺) spinel-type phosphors are promising near-infrared (NIR) luminescent materials because of its non-toxic, good thermal stability and adjustable emission. Unfortunately, the existence of detrimental oxygen defects in the MgGa₂O₄ host lead to unsatisfactory luminescence efficiency. In this study, an oxygen vacancy repairing engineering has been innovatively developed via Li⁺ substitution in MGO: Fe³⁺ for significantly enhancing NIR emission of 709 nm and maintaining outstanding thermal stability. The emission intensity and internal quantum efficiency of Li-repaired MGO: Fe³⁺ are enhanced to 130 % and 156 % times compared to that of the MGO: Fe³⁺, respectively. This study demonstrates an innovative strategy to enhance the photoluminescence quantum yield of MgGa₂O₄-based infrared phosphors by reducing the oxygen vacancies through cation repair route.

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Li+辅助氧空位修复策略增强Fe3+掺杂MgGa2O4荧光粉的近红外发光

Fe3+掺杂MgGa2O4 （MGO: Fe3+）尖晶石型荧光粉具有无毒、热稳定性好、发射可调等优点，是一种很有前途的近红外发光材料。不幸的是，MgGa2O4基质中存在有害的氧缺陷，导致其发光效率不理想。在本研究中，通过在MGO: Fe3+中替换Li+，创新地开发了一种氧空位修复工程，显著提高了709 nm的近红外发射，并保持了良好的热稳定性。锂离子修复后的MGO: Fe3+的发射强度和内量子效率分别提高了130%和156%。本研究展示了一种通过阳离子修复途径减少氧空位来提高mgga2o4基红外荧光粉光致发光量子产率的创新策略。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.