Synthesis of Rare-Earth-Doped Strontium Tungstate Phosphor at Room Temperature and Applied Flexible Composite

Jung-Hyun Wi; Jae-Yong Jung; Sang-Geon Park

doi:10.3390/ma15248922

Synthesis of Rare-Earth-Doped Strontium Tungstate Phosphor at Room Temperature and Applied Flexible Composite

Materials (Basel). 2022 Dec 13;15(24):8922. doi: 10.3390/ma15248922.

Authors

Jung-Hyun Wi¹, Jae-Yong Jung², Sang-Geon Park³

Affiliations

¹ Department of Smart Manufacturing Engineering, Changwon National University, Changwon 51140, Republic of Korea.
² Research and Business Development Foundation, Engineering Building, Silla University, Busan 45985, Republic of Korea.
³ Department of Mechatronics Convergence Engineering, Changwon National University, Changwon 51140, Republic of Korea.

Abstract

In this study, we successfully synthesized rare-earth-doped crystalline SrWO₄ at room temperature by co-precipitation. The results from the X-ray diffraction analysis showed a main diffraction peak related to the (112) plane. Phosphors doped with either Dy³⁺ or Sm³⁺ ions showed strong light absorption in the UV region and blue-yellow and red light emission. To synthesize a white light phosphor, Dy³⁺ and Sm³⁺ ions were co-doped to produce a SrWO₄:[Sm³⁺]/[Dy³⁺] phosphor. When the Sm³⁺ ion concentration was increased and the Dy³⁺ concentration was maintained, the red light intensity increased while the blue-yellow light intensity decreased. The composites were combined with polydimethylsiloxane (PDMS), and a flexible composite material was fabricated. The composite exhibited various luminescence properties under UV and visible light, which suggested its potential for use as an LED color filter.

Keywords: SrWO4; flexible; luminescence; phosphor.

Grants and funding

Customized Research Capabilities in 2022./Changwon National University