Huge enhancement of Sm2+ emission via Eu2+ energy transfer in a SrB4O7 pressure sensor. Issue 14 (9th March 2020)

• Record Type: Journal Article
• Authors: Zheng, Teng; Runowski, Marcin; Woźny, Przemysław; Lis, Stefan; Lavín, Víctor
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 14(2020)
• Page Start: 4810
• Page End: 4817
• Publication Date: 2020-03-09
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc00463d
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Giant enhancement of optical response of the luminescent pressure sensor SrB4 O7 :Sm 2+, co-doped with Eu 2+, caused by effective Eu 2+ → Sm 2+ energy transfer. Abstract : Taking advantage of the excellent pressure-sensing properties of the Sm 2+ ion in the SrB4 O7 crystal, we demonstrate an enormous enhancement of about 60 times in the emission intensity of Sm 2+ ions when Eu 2+ ions are also incorporated into the crystalline structure. This enhancement is induced by the energy transfer from Eu 2+ to Sm 2+ ions. The spectral position of the ultra-narrow and most intense 5 D0 → 7 F0 emission line in the material was correlated with pressure and successfully calibrated up to about 58 GPa. The material exhibits favorable pressure-sensing features, i.e. d λ /d p ≈ 0.29 nm GPa −1, negligible temperature-dependent shift, narrow and well-separated emission lines, and a strong luminescence signal. The samples also exhibit multicolor tunable luminescence from orange-red to amaranth, and to warm-white light, depending on the excitation wavelength used and dopant content in the matrix, allowing their potential application in white light emitting diode (LED) devices.