Cryogenic spatial–temporal imaging of surface photocarrier dynamics in MAPbI3 films at the single grain level
Source abstract
Abstract
We use cryogenic spatial–temporal photoluminescence (PL) imaging measurements down to 10 K and with short-wavelength, 405 nm laser excitation to study surface charge generation, trapping, and recombination at single bright and dark grains as well as their boundaries in model methylammonium lead iodide (MAPbI3) polycrystalline thin films. These salient conditions are shown to be critical for identifying both the detrimental and cooperative roles of grain microstructures where the dark grains serve as the PL quenching center, while the grain boundaries are largely benign and may promote electron–hole separation.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Advanced Semiconductor Detectors and Materials · Semiconductor Quantum Structures and Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics and Astronomy and Ames Laboratory-U.S. DOE, Iowa State University 1 , Ames, Iowa 50011, USA
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo 2 , Toledo, Ohio 43606, USA
Funding
U.S. Department of Energy · U.S. National Science Foundation
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