Low-power photon upconversion occurring between a sensitizer and an acceptor successfully sensitizes wide-bandgap semiconductors to sub-bandgap non-coherent photons as depicted by modulated photocurrent response. The photoaction measured clearly demonstrates that the process is derived exclusively from the sensitizer's low energy photons absorption. The combined results represent the first experimental observations of sub-bandgap sensitization of a semiconductor using organic/inorganic-based upconversion photochemistry. The potential application of this technology is also discussed in terms of conditions and efficiency.

Upconversion-powered photoelectrochemistry: Insights into efficiency and device application

243rd National Meeting (2012)

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