Solar Quantum Cutting and Spectral Downconversion using Ytterbium-Doped Metal-Halide Perovskites
Daniel Gamelin a
a University of Washington, Department of Chemistry, Seattle, WA 98195-1700
nanoGe Fall Meeting
Proceedings of nanoGe Fall Meeting19 (NGFM19)
#NCFun19. Fundamental Processes in Semiconductor Nanocrystals
Berlin, Germany, 2019 November 3rd - 8th
Organizers: Ivan Infante and Jonathan Owen
Invited Speaker, Daniel Gamelin, presentation 294
Publication date: 16th July 2019

Yb3+-doped lead-halide perovskites (Yb3+:CsPb(Cl1-xBrx)3) have very recently emerged as unique materials combining strong, tunable broadband absorption with near-infrared photoluminescence quantum yields (PLQYs) approaching 200% at ambient temperature. These remarkable properties make Yb3+:CsPb(Cl1-xBrx)3 nanocrystals and related morphologies extremely promising candidates for spectral shaping in solar energy conversion devices. This talk will describe some of our group's recent research into synthesis and characterization of nanocrystals and thin films of Yb3+:CsPb(Cl1-xBrx)3, and progress in controlling, understanding, and exploiting the physical properties of these doped metal-halide perovskites for photon management in solar applications. In particular, fundamental spectroscopic and electronic-structure properties will be described as they pertain to understanding some of the unusual photophysics observed in these highly luminescent materials, such as their extremely efficient quantum cutting, their photoluminescence saturation, and the effects of energy gap tuning or defect engineering. Modeling and application of these materials in solar spectral downconversion technologies will also be discussed.

This research was supported by the U.S. National Science Foundation (NSF) through DMR-1807394 and through the UW Molecular Engineering Materials Center, a Materials Research Science and Engineering Center (DMR-1719797). This work was also supported by the State of Washington through the UW Clean Energy Institute and by the Washington Research Foundation. Part of this work was conducted at the UW Molecular Analysis Facility, a National Nanotechnology Coordinated Infrastructure site supported in part by the NSF (ECC-1542101), the University of Washington, the Molecular Engineering and Sciences Institute, the Clean Energy Institute, and the National Institutes of Health.

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