Yb-doped double tungstates for down-conversion applications
Authors: Sani E., Brugioni A., Mercatelli L., Parisi D., Zharikov E.V., Lis D.A., Subbotin K.A.
Autors Affiliation: CNR, INO, Natl Inst Opt, Largo E Fermi 6, I-50125 Florence, Italy; Univ Pisa, CNR, NEST Ist Nanosci, Largo B Pontecorvo 3, I-56127 Pisa, Italy; Univ Pisa, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy; Russian Acad Sci, Prokhorov Gen Phys Inst, Vavilova St 38, Moscow 119991, Russia; Mendeleev Univ Chem Technol Russia, Miusskaya Sq 9, Moscow 125047, Russia
Abstract: The paper discusses the potential of several Yb-doped scheelite-like double tungstate crystals for sunlight downconversion. Four hosts NaY(WO4)2, NaY1/2Gd1/2(WO4)2, NaY2/3Gd1/3(WO4)2, and NaY(Mo1/2W1/2O4)2 with the same 10% at. Yb doping level were comparatively investigated. Besides that, the eﬀect of increase the Yb concentration from 10at.% to 15at.% was checked in case of NaY(WO4)2 crystal host. The eﬃcient ytterbium 900-nm broadband emission was obtained under ultraviolet excitation, despite the absence of Yb absorption linesinthis range.Thishappens dueto non-radiative energy transferfromdonorcenters ofthe hoststo Ybactive ions. This absorption wavelengths range of the host can be tuned by changing the crystal chemical composition. The obtained results indicate that the family of Yb-doped scheelite-like double tungstates is a suitable candidate for developing down-converter materials for solar energy applications.
Journal/Review: OPTICAL MATERIALS
Volume: 94 Pages from: 415 to: 422
KeyWords: Sunlight down-conversion, Photovoltaics, Ytterbium, Coatings, Glass-ceramics
DOI: 10.1016/j.optmat.2019.06.006Citations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-02-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here