发光学报2024，Vol.45Issue(3)：443-449,7.DOI:10.37188/CJL.20230310
Al2O3表面包覆增强K2SiF6∶Mn4+荧光粉发光性能和湿热稳定性
Luminescence Performance and Damp-heat Stability of K2SiF6:Mn4+ Phosphor Enhanced by Al2O3 Surface Coating
摘要
Abstract
This study explores the use of atomic layer deposition(ALD)technology for encapsulating and modifying the surface of K2SiF6∶Mn4+(KSFM)red phosphors for white light emitting diodes(LEDs),and its impact on the struc-tural properties,luminescent characteristics,and stability in a humid and hot environment.The findings reveal that by employing ALD technology with trimethylaluminum as the precursor and ozone as the oxidant,an alumina coating can be formed on the surface of KSFM.X-ray diffraction and surface morphology analyses indicate that the ALD treat-ment process does not affect the crystal phase and morphology of the KSFM phosphors.Moreover,luminescence spectroscopy analysis demonstrates that the alumina coating,owing to its passivation properties,can enhance the lu-minescent intensity of KSFM phosphors without altering their emission wavelength.Furthermore,compared to un-coated KSFM phosphors,the coating layer can significantly enhance the damp-heat stability of KSFM powders.Fol-lowing a 24-hour aging treatment in an 85%humidity/85℃environment,samples coated with ALD maintain 84%of their initial luminescent intensity.关键词
K2SiF6∶Mn4+/红色荧光粉/表面改性/原子层沉积/湿热稳定性Key words
K2SiF6∶Mn4+/red phosphor/surface modification/atomic layer deposition/damp-heat stability分类
数理科学引用本文复制引用
段凌岳,路万兵,王智逾,赵金鑫,王大伟,刘海旭,于威..Al2O3表面包覆增强K2SiF6∶Mn4+荧光粉发光性能和湿热稳定性[J].发光学报,2024,45(3):443-449,7.基金项目
河北省自然科学基金(E2021201014) （E2021201014）
河北大学实验室开放项目基金(sy202232) （sy202232）
中央引导地方项目(236Z1408G)Supported by Natural Science Foundation of Hebei Province(E2021201014) （236Z1408G）
Laboratory Open Project Fund of Hebei University(sy202232) （sy202232）
The Central Project Guiding Local Science and Technology for Development(236Z1408G) （236Z1408G）
