Title

Synthesis of Photoactive NaYF4: Yb, Cr Nanoparticles

Abstract

Solar cells are a growing source of renewable energy. However, standard solar cells absorb only visible light, which makes up less than 10 percent of solar radiation reaching earth. By utilizing nanoparticles, it is possible to efficiently convert some of the ultraviolet and infrared radiation to visible light. This is done by inserting pairs of atoms, called dopants, into a nanoparticle lattice. One of these atoms will then absorb a specific wavelength of radiation and transfer the energy to the other atom, which will emit the energy at a different wavelength. Specific dopant pairs allow for the conversion of specific wavelengths of radiation. The NaYF4 lattice has been found to be an effective host for dopant pairs. By modifying synthesis from the literature for NaYF4: Yb, Er we hope to create an efficient synthesis for NaYF4: Yb, Cr, thereby allowing for the conversion of an additional set of wavelengths.

Faculty Sponsor

Mark Juhasz

Tracks

Heavens and Earth

Terms of Use

ARMINDA Terms of Use

Location

Science 159

Presentation Type

Oral Presentation

Research Funding Source or OCS Program

University of Washington, Gamelin Lab

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Apr 11th, 4:15 PM Apr 11th, 4:30 PM

Synthesis of Photoactive NaYF4: Yb, Cr Nanoparticles

Science 159

Solar cells are a growing source of renewable energy. However, standard solar cells absorb only visible light, which makes up less than 10 percent of solar radiation reaching earth. By utilizing nanoparticles, it is possible to efficiently convert some of the ultraviolet and infrared radiation to visible light. This is done by inserting pairs of atoms, called dopants, into a nanoparticle lattice. One of these atoms will then absorb a specific wavelength of radiation and transfer the energy to the other atom, which will emit the energy at a different wavelength. Specific dopant pairs allow for the conversion of specific wavelengths of radiation. The NaYF4 lattice has been found to be an effective host for dopant pairs. By modifying synthesis from the literature for NaYF4: Yb, Er we hope to create an efficient synthesis for NaYF4: Yb, Cr, thereby allowing for the conversion of an additional set of wavelengths.

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