DOI: https://doi.org/10.29363/nanoge.inform.2019.023
Publication date: 8th January 2019
When everything is said and done, the most remarkable property of Halide Perovskites is that they can have defect densities that approach those that can be estimated from thermodynamics, i.e, a near-absence of kinetically stabilized defects, which naturally is the kind on which (external and internal) doping is based. This is especially surprising if we consider the quick and “chimie douce” way of preparation of films as well as of most single crystals. Note though that the experimentally "determined" defect densities are all deduced from common (indirect) measurements for charged or neutral defects, using mosels that include assumptions, explicitly and/or implicitly.
In this talk I will show how this behaviour likely reflects a fundamental property of these materials, with a rather simple basis. In the talk I will combine experimental results from several sources, including our own, for thermodynamic, optical, and electrical data and will ponder the possibility that the conclusions can be generalized to help look for other ultra-low defect density materials.
Thanks to Yevgeny Rakita, Igal Levine, Omer Yaffe, Leeor Kronik, Gary Hodes (Weizmann Inst.)
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