Published August 18, 2019 | Version v1

Defect Activity in Lead-Halide Perovskites

  • 1. Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, Milano, Italy
  • 2. Department of Chemistry Biology and Biotechnology, University of Perugia, Perugia, Italy

Description

The presence of various types of chemical interactions in metal–halide perovskite semiconductors gives them a characteristic “soft” fluctuating structure, prone to a wide set of defects. Understanding of the nature of defects and their photochemistry is summarized, which leverages the cooperative action of density functional theory investigations and accurate experimental design. This knowledge is used to describe how defect activity determines the macroscopic properties of the material and related devices. Finally, a discussion of the open questions provides a path towards achieving an educated prediction of device operation, necessary to engineer reliable devices.

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Additional details

Funding

European Commission
SOPHY - The role of Softness in the Physics of Defects: Probing Buried Interfaces in Perovskites Optoelectronic Devices 771528
European Commission
PERTPV - Perovskite Thin-film Photovoltaics (PERTPV) 763977