Optical characterization of Sm3+-doped calcium-orthosilicate phosphors prepared using the solid-state reaction method

• Published in: Journal of the Korean Physical Society Vol. 63; no. 12; pp. 2362 - 2366
• Main Authors: Ha, Myoung Gyu, Jeong, Jae-Sun, Han, Kyoung-Rim, Bae, Yu Ri, Kim, Ju Sung, Kim, Jong Pil, Hong, K. S., Yang, Ho-Soon
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2013; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Near ultraviolet excitation; Calcium orthosilicate; Sm; Red-orange emission
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.63.2362

Trivalent samarium-doped calcium-orthosilicate (Ca 2 SiO 4 :Sm 3+ ) powder is synthesized by varying Sm 2 O 3 amounts and the solid-state reaction method. X-ray diffraction patterns show that the obtained powders formed as orthorhombic-structured Ca 2 SiO 4 . Scanning electron microscope images show that the powders have uniform structures of a few micrometers in size. Photophysical features are analyzed by taking absorption, excitation, and emission spectra. Emission spectra exhibit a red-orange luminescence from the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ in all synthesized phosphors. Both the physical and the optical properties show that Ca 2 SiO 4 :Sm 3+ is an encouraging red-orange emitting phosphor applicable to photonics operating with near ultra-violet excitation.