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  1. Dynamics of the triplet-pair state reveals the likely coexistence of coherent and incoherent singlet fission in crystalline hexacene

    Monahan, Nicholas; Sun, Dezheng; Tamura, Hiroyuki; ... - Nature Chemistry
    Not provided.

  2. Ultrafast and band-selective Auger recombination in InGaN quantum wells

    Williams, Kristopher; Monahan, Nicholas; Koleske, Daniel; ... - Applied Physics Letters
    In InGaN quantum well based light-emitting diodes, Auger recombination is believed to limit the quantum efficiency at high injection currents. Here in this paper, we report the direct observation of carrier loss from Auger recombination on a sub-picosecond timescale in a single InGaN quantum well using time-resolved photoemission. Selective excitations of different valence sub-bands reveal that the Auger rate constant decreases by two orders of magnitude as the effective hole mass decreases, confirming the critical role of momentum conservation.
    Cited by 15
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