Polyethylene Terephthalate Thin Film Incorporating Green Emitting Up-Conversion Phosphor

Abstract:

Er³⁺-doped CaTiO₃ up-conversion phosphor was prepared by chemical solution method. Host thin film to incorporate up-conversion phosphor was a nanostructured organo-silicon compound prepared from methyl tri-methoxysilane and 3-glycidoxy-propyl-trimethoxy-silane. Further, we prepared a phosphor paste by mixing the organo-silicon compound with 3 mol% Er³⁺-doped CaTiO₃. Subsequently, this paste was coated on polyethylene terephthalate, followed by heat-treatment at 120°C. The visible emission was found to be at the region 525 ~ 530 nm, 540 ~ 560 nm, and 650 ~ 660 nm corresponding to the ²H_11/2 ® ⁴I_15/2, ⁴S_3/2 ® ⁴I_15/2, and ⁴F_9/2 ® ⁴I_15/2 transitions of Er³⁺ ions, respectively. The transmission of performance IR detection cards is to be above 90% in the range from 200 to 1600 nm because the weak infrared light should pump the CaTiO₃ up-conversion phosphor. The prepared up-conversion phosphor films can potentially be used as low-power IR detectors in optical fiber communication and medical instrument.

• Periodical: Key Engineering Materials (Volume 753)
• Pages: 168-172
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.753.168
• Online since: August 2017
• Authors: Young Sun Jeon, Sung Dai Kim, Hwang Bo Seung, Kyu Seog Hwang*
• Keywords: CaTiO₃:Er³⁺, Organo-Silicon Compound, Up-Conversion Phosphor

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