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Showing 1–7 of 7 results
Advanced filters: Author: Prashant V. Kamat Clear advanced filters

  • Quantum dot LED (light-emitting diode) optimization through the control of charge carriers’ kinetics is presented using impedance spectroscopy. The mobility of charge carriers through each one of the layers provide a path to estimate the transition time of each one of the charge carriers toward the emitting layer. By focusing on thickness optimization of electron transferring layer we can control the transition time of charge carriers and maximize radiative recombination.

    • Gary Zaiats
    • Shingo Ikeda
    • Prashant V. Kamat
    ResearchOpen Access
    NPG Asia Materials
    Volume: 12, P: 1-6

  • Mixed halide hybrid perovskites possess tunable band gaps, however, under illumination they undergo phase separation. Using spectroscopic measurements and theoretical modelling, Draguta and Sharia et al. quantitatively rationalize the microscopic processes that occur during phase separation.

    • Sergiu Draguta
    • Onise Sharia
    • Masaru Kuno
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8

  • The efficiency of photovoltaic materials is compromised by their inability to capture all the energy absorbed when excited by high-energy photons. Such absorption creates 'hot' electrons, and now their transfer from excited lead selenide nanocrystals to an electron acceptor provides a necessary initial step towards tapping their 'lost' energy.

    • Prashant V. Kamat
    News & Views
    Nature Chemistry
    Volume: 2, P: 809-810

  • Determining the mechanism of charge carrier transport in solar cells is important for their development towards higher efficiencies. Here, the authors elucidate the spatial and temporal diffusion of charge carriers in hybrid perovskite thin films through ultrafast transient absorption microscopy.

    • Zhi Guo
    • Joseph S. Manser
    • Libai Huang
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-8

  • Femtosecond transient absorption spectroscopy measurements indicate that the dominant relaxation pathway for excited states in perovskite materials is by recombination of free electrons and holes.

    • Joseph S. Manser
    • Prashant V. Kamat
    Research
    Nature Photonics
    Volume: 8, P: 737-743