TY - JOUR
T1 - UV-stimulated near-IR emission of Pr3+ in phosphate glass via twofold-coordinated Sn centers
AU - Jiménez, José A.
AU - Sendova, Mariana
AU - Rosim Fachini, Esteban
N1 - Funding Information:
M. Sendova is grateful for the assistance of Dr. Brian Hosterman from the Optical Spectroscopy and Nanomaterials Lab at NCF. Research was partially sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-09-2-0004. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation heron.
PY - 2014/11
Y1 - 2014/11
N2 - The optical properties of Pr2O3 and SnO co-doped barium-phosphate glass prepared by the melt-quenching technique have been investigated. Optical absorption and X-ray photoelectron spectroscopy (XPS) are employed in the characterization of tin species. The prevalence of divalent tin is indicated by the XPS data in accord with a conspicuous absorption band detected around 287 nm ascribed to twofold-coordinated Sn centers (isoelectronic with Sn2+). Upon ultraviolet (UV) photoexcitation of the tin centers, near-infrared (IR) emission from Pr3+ ions is realized. An excitation spectrum acquired by monitoring Pr3+ emission from the 1D2 state at 1.03 μm revealed a broad band around 290 nm consistent with a SnPr donor-acceptor energy transfer channel. The data supports a mechanism starting with the singlet-to-singlet UV excitation of Sn centers, followed by the intersystem crossing populating their triplet states emitting in the visible. From these, energy transfer occurs to 3P0, 3P1, 1I6, and 3P2 resonant states in Pr3+, from which the near-IR emitting states 1D2 and 1G4 are populated.
AB - The optical properties of Pr2O3 and SnO co-doped barium-phosphate glass prepared by the melt-quenching technique have been investigated. Optical absorption and X-ray photoelectron spectroscopy (XPS) are employed in the characterization of tin species. The prevalence of divalent tin is indicated by the XPS data in accord with a conspicuous absorption band detected around 287 nm ascribed to twofold-coordinated Sn centers (isoelectronic with Sn2+). Upon ultraviolet (UV) photoexcitation of the tin centers, near-infrared (IR) emission from Pr3+ ions is realized. An excitation spectrum acquired by monitoring Pr3+ emission from the 1D2 state at 1.03 μm revealed a broad band around 290 nm consistent with a SnPr donor-acceptor energy transfer channel. The data supports a mechanism starting with the singlet-to-singlet UV excitation of Sn centers, followed by the intersystem crossing populating their triplet states emitting in the visible. From these, energy transfer occurs to 3P0, 3P1, 1I6, and 3P2 resonant states in Pr3+, from which the near-IR emitting states 1D2 and 1G4 are populated.
KW - Energy transfer
KW - Glasses
KW - Luminescence
KW - Optical materials
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U2 - 10.1016/j.infrared.2014.08.016
DO - 10.1016/j.infrared.2014.08.016
M3 - Article
AN - SCOPUS:84907560489
VL - 67
SP - 359
EP - 362
JO - Infrared Physics and Technology
JF - Infrared Physics and Technology
SN - 1350-4495
ER -