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Sensitizing Singlet Fission with Perovskite Nanocrystals
Haipeng Lu1, Xihan Chen1, John E Anthony2
1Chemistry & Nanoscience Center , National Renewable Energy Laboratory , Golden , Colorado 80401 , United States.
Journal of the American Chemical Society
|March 2, 2019
Summary
Lead halide perovskite nanocrystals enable efficient singlet energy transfer to pentacene molecules, unlike traditional nanocrystals. This process generates molecular pentacene triplets via singlet fission, offering new solar energy perspectives.
Area of Science:
- Materials Science
- Photochemistry
- Nanotechnology
Background:
- Colloidal semiconductor nanocrystals and organic molecules offer unique photonic and optoelectronic applications.
- Traditional semiconductor nanocrystals facilitate triplet energy transfer with acene molecules.
Purpose of the Study:
- Investigate energy transfer dynamics between lead halide perovskite nanocrystals and surface-anchored pentacene.
- Explore the potential of singlet fission for solar energy utilization.
Main Methods:
- Surface functionalization of lead halide perovskite nanocrystals with pentacene molecules.
- Spectroscopic analysis to study energy transfer mechanisms.
Main Results:
- Perovskite nanocrystals promote Dexter-like singlet energy transfer to pentacene, distinct from traditional nanocrystals.
- Efficient generation of molecular pentacene triplets through singlet fission on the nanocrystal surface.
Conclusions:
- Unveiled novel energy dynamics between perovskite nanocrystals and acenes.
- Demonstrated a strategy for utilizing singlet fission across the solar spectrum.
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