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  1. Article

    Open Access

    Multiphoton Phosphorescence of Simple Ketones by Visible-light Excitation and Its Consideration for Active Sensing in Space

    Acetone and butanone were seen to emit blue light around 450 nm when excited in the green by a high intensity pulsed laser. The pathway of this anti-Stokes emission is believed to be multiphoton absorption fol...

    Thomas de Prinse, Elizaveta Klantsataya, Georgios Tsiminis… in Journal of Fluorescence (2022)

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  2. No Access

    Article

    Endothermic singlet fission is hindered by excimer formation

    Singlet fission is a process whereby two triplet excitons can be produced from one photon, potentially increasing the efficiency of photovoltaic devices. Endothermic singlet fission is desired for a maximum en...

    Cameron B. Dover, Joseph K. Gallaher, Laszlo Frazer, Patrick C. Tap**… in Nature Chemistry (2018)

  3. Article

    Open Access

    Acoustic-optical phonon up-conversion and hot-phonon bottleneck in lead-halide perovskites

    The hot-phonon bottleneck effect in lead-halide perovskites (APbX3) prolongs the cooling period of hot charge carriers, an effect that could be used in the next-generation photovoltaics devices. Using ultrafast o...

    Jianfeng Yang, **aoming Wen, Hongze **a, Rui Sheng, Qingshan Ma… in Nature Communications (2017)

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  4. No Access

    Article

    Vibrational coherence probes the mechanism of ultrafast electron transfer in polymer–fullerene blends

    The conversion of photoexcitations into charge carriers in organic solar cells is facilitated by the dissociation of excitons at the donor/acceptor interface. The ultrafast timescale of charge separation deman...

    Yin Song, Scott N. Clafton, Ryan D. Pensack, Tak W. Kee… in Nature Communications (2014)

  5. No Access

    Chapter and Conference Paper

    Femtosecond multicolor pump-probe investigation of ultrafast electron transfer of (NH3)5RuIIINCRuII(CN)5 - in solution

    Ultrafast measurements on (NH3)5RuIIINCRuII(CN)5 - in solution reveal an ultrafast spectral component due to vibrationally unrelaxed stimulated emission, allowing for new insights on the interplay...

    Dong Hee Son, Patanjali Kambhampati, Tak W. Kee, Paul F. Barbara in Ultrafast Phenomena XII (2001)