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Research Highlight | Center for Nanoscale Materials

Pathway for Better Photon Upconversion in Solar Applications

For a study published in ACS Energy Letters, researchers elucidated the pathway for photon upconversion in a perovskite/rubrene bilayer.

Scientific Achievement

The photophysical pathway has been revealed for triplet sensitization at the perovskite/rubrene interface. It involves rapid extraction on cooling of thermally excited charge carriers in the perovskite followed by triplet formation in the rubrene.

Significance and Impact

Current silicon-based solar cells cannot absorb wavelengths above 1100 nm, limiting their efficient use. The present results will help improve perovskite-based photon upconversion in these cells.

Research Details

•Ultrafast transient absorption spectroscopy was used to elucidate the processes underlying triplet generation in a perovskite/rubrene bilayer.
•The results indicate ultrafast charge extraction and subsequent triplet generation on a sub-nanosecond time scale.



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Work was performed in part at the Center for Nanoscale Materials

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