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  • Author(s):
    R. Scheidt, B. Seger, P. Kamat, Tor Elmelund
    Abstract:

    MAPbBr3 and MAPbI3 films cast onto glass slides and physically paired together undergo halide exchange to form mixed halide films. The change in halide composition in these two ∼130 nm thick films occurs concurrently with Br− diffusing toward the MAPbI3 film and I− diffusing toward the MAPbBr3 film. The diffusion of these halide species, which is tracked through changes in the absorption, offers a direct measurement of thermally activated halide diffusion in perovskite films. The increase in …

    Date Published:
    2019-07
    Record Visibility:
    Public
  • Author(s):
    S. J. Yoon, H. Kim, J. Lee, P. Kamat
    Abstract:

    ABSTRACT: Intrinsic low stability and short excited lifetimes associated with Ag nanoclusters (NCs) are major hurdles that have prevented the full utilization of the many advantages of Ag NCs over their longtime contender, Au NCs, in light energy conversion systems. In this report, we diagnosed the problems of conventional thiolated Ag NCs used for solar cell applications and developed a new synthesis route to form aggregation-induced emission (AIE)- type Ag NCs that can significantly overcom…

    Date Published:
    2019
    Record Visibility:
    Public