Red-emitting alkaline-earth rare-earth pentaoxometallates powders prepared by metal carboxylates solution

Bulletin of materials science

Jin-Tae Kim³  Kyu-Seog Hwang¹  Sung-Dae Kim¹  Seung Hwangbo² 

[1] Department of Biomedical Engineering, Nambu University, 864-1 Wolgye-dong, Gwangsan-gu, Gwangju 506824, Korea$$Department of Biomedical Engineering, Nambu University, 864-1 Wolgye-dong, Gwangsan-gu, Gwangju 506824, KoreaDepartment of Biomedical Engineering, Nambu University, 864-1 Wolgye-dong, Gwangsan-gu, Gwangju 506824, Korea$$;Department of Electronic and Photonic Engineering, Honam University, 59-1 Seobong-dong, Gwangsan-gu, Gwangju 506714, Korea$$Department of Electronic and Photonic Engineering, Honam University, 59-1 Seobong-dong, Gwangsan-gu, Gwangju 506714, KoreaDepartment of Electronic and Photonic Engineering, Honam University, 59-1 Seobong-dong, Gwangsan-gu, Gwangju 506714, Korea$$;Department of Photonic Engineering, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501759, Korea$$Department of Photonic Engineering, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501759, KoreaDepartment of Photonic Engineering, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501759, Korea$$

关键词: Metal carboxylates;    Sr2EuAlO5;    Phosphor.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Moisture-insensitive metal carboxylates that are mostly liquids at room temperature have been first applied to the preparation of strontium europium aluminate (Sr₂EuAlO₅) powders for red-emitting phosphor under near ultraviolet radiation. Strontium naphthenate, aluminium-2-ethylhexanoate and europium-2-ethylhexanoate were dissolved with toluene to prepare starting solution. Precursor pyrolyzed at 500 °C for 240 min was finally annealed at 900â€�??1200 °C for 240 min in Ar. X-ray diffraction analysis, field emissionâ€�?�scanning electron microscope and fluorescent spectrophotometer were used to evaluate structural and optical properties. For the 1000 °C-annealed powders with regular shape and narrow size distribution confirmed by FEâ€�?�SEM observation, strong red emission at 615nm under the excitation of 395nm maximum was reached, then the higher annealed samples at above 1100 °C gave the lower emission intensities.

【 授权许可】

Unknown