Poster + Presentation + Paper
5 March 2021 Lanthanide-doped down-conversion fluorides: synthesis, characterization, and applications
Author Affiliations +
Conference Poster
Abstract
Down-conversion phosphors based on ions of lanthanides can be used to convert UV/blue components of solar spectrum in near-infrared radiation more suitable for conventional silicon photovoltaic (PV) cells. Comparing to other down convertors, their advantages are long Stokes shift (>300 nm) excluding re-absorption, and environment safety. However, down-conversion efficiency remains an issue. The paper reports on synthesis and characterization of down-conversion phosphor based on lanthanide-doped fluoride NaYF4:Yb3+, Er3+. The phosphor was synthesized using inexpensive wet method and further baked at ~500°C for 1 h to convert NaYF4 matrix from cubic to hexagonal phase. The obtained micro-powder was ball-milled to nano-powder. The phosphor demonstrated down-conversion radiation from 830 to 1100 nm attributed to Yb3+. The Stokes shift was ~600 nm. The intensity of NIR peak radiation increased three times with increasing concentration of Yb3+ from 3 to 14%. A thin-sheet down-convertor of a Luminescent Solar Concentrator (LSC) was made in the form of a projector Mylar transparency coated with nanocolloid of the phosphor in a solution of polymer PMMA in chlorobenzene. Such thin sheet improved by 15% the PV power produced by the LSC being illuminated with a solar simulator as compared to an incandescent light bulb. The obtained results can be used in building more efficient PV green power.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Darayas N. Patel, Sergey S. Sarkisov, Abdalla M. Darwish, Aminaa Jallow, Kaiana Lewis, Dedrian Barrett, Andrew Dholichand, Mike Warren Jr., and Kayla McEady "Lanthanide-doped down-conversion fluorides: synthesis, characterization, and applications", Proc. SPIE 11687, Oxide-based Materials and Devices XII, 1168727 (5 March 2021); https://doi.org/10.1117/12.2577886
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KEYWORDS
Ions

Solar cells

Near infrared

Phonons

Photovoltaics

Solar energy

Solar radiation

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