Materials that can convert absorbed photons to emitted photons with quantum efficiencies exceeding 100% are rare, but of great interest for potentially increasing the overall efficiencies of existing solar-energy conversion technologies beyond their usual thermodynamic limits. This talk will describe some of our group's recent research into understanding, controlling, and exploiting new quantum-cutting doped halide perovskite semiconductor nanocrystals and bulk materials. These unique materials combine broad absorption profiles with photoluminescence quantum yields approaching 200%, making them very attractive for solar spectral conversion in applications such as photovoltaics or luminescent solar concentration. Fundamental spectroscopic and electronic-structure properties will be emphasized as they pertain to understanding the unusual photophysics displayed by these highly luminescent materials. Specific solar applications will also be described.

Quantum-cutting ytterbium-doped halide perovskites that show photoluminescence quantum yields approaching 200%

2019 Spring National Meeting

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