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Showing 1–5 of 5 results
Advanced filters: Author: Maral Vafaie Clear advanced filters

  • Solution-processed lead–tin binary perovskite photodetectors that have an external quantum efficiency of 85% at 850 nm, dark current below 10–8 A cm–2 and response time faster than 100 ps can be used in light detection and ranging applications, resolving sub-millimetre distances with a typical 50 µm standard deviation.

    • Amin Morteza Najarian
    • Maral Vafaie
    • Edward H. Sargent
    Research
    Nature Electronics
    Volume: 5, P: 511-518

  • The realisation of film made up of different compositions using colloidal QD inks remains a challenge because of redispersing of underlying films by polar solvents. Here, the authors introduce aromatic ligands to achieve QD inks in weakly-polar solvents that enable fabrication of multi-compositional films.

    • Seungjin Lee
    • Min-Jae Choi
    • Edward H. Sargent
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-8

  • Methylammonium is shown to influence the crystallization process in hybrid lead halide perovskites, leading to a more homogeneous chemical distribution of caesium and formamidinium and improved charge transport between grains in multi-cation systems.

    • Makhsud I. Saidaminov
    • Kristopher Williams
    • Edward H. Sargent
    Research
    Nature Materials
    Volume: 19, P: 412-418

  • Developing photodetectors that work across the electromagnetic spectrum remains a challenge, and there are many trade-offs to be considered, including speed, efficiency, noise, spectral detection range and cost. This Review discusses the photophysical attributes of the active materials that define the interrelated aspects of response amplitude and temporal dynamics in photodetectors.

    • Amin Morteza Najarian
    • Maral Vafaie
    • Edward H. Sargent
    Reviews
    Nature Reviews Physics
    Volume: 6, P: 219-230