Characterizations and optical properties of orange–red emitting Sm3+-doped Y6WO12 phosphors

• DOI: 10.1016/j.jlumin.2014.06.041
• Publication Date: 2014-06-26T11:01:13Z
• Authors: Ruijin Yu; Yue Guo; Lili Wang; Hyeon Mi Noh; Byung Kee Moon; Byung Chun Choi; Jung Hyun Jeong
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract A series of orange–red emitting Y6WO12:xSm3+ (0.005≤x≤0.15) phosphors were synthesized by the convenient solid-state reaction. X-ray diffraction and photoluminescence spectra were utilized to characterize the structure and luminescence properties of the as-synthesized phosphors. The results show an efficient energy transfer from WO66− group to Sm3+ occurs. The emission spectra of the Y6WO12:Sm3+ phosphors consisted of some sharp emission peaks of Sm3+ ions centred at 571 nm, 610 nm, 675 nm, 720 nm. The strongest one is located at 610 nm due to 4G5/2–6H7/2 transition of Sm3+, generating bright orange–red light. The optimum dopant concentration of Sm3+ ions in Y6WO12:Sm3+ is around 5 mol% and the energy transfer between Sm3+ is found to be through exchange interaction. The CIE chromaticity coordinates of the Y6WO12:0.05Sm3+ phosphor were located in the orange reddish region. The Y6WO12:Sm3+ phosphors may be potentially used as orange–red phosphors for white light-emitting diodes.