David Mitzi1
Duke University1
Hybrid organic-inorganic perovskite (HOIP) semiconductors based on metal halide frameworks offer unprecedented opportunity to tailor structural and materials properties using the full flexibility afforded by the associated inorganic and organic components,<sup>1</sup> and such tunability offers wide-ranging potential for applications including solar cells, light-emitting devices, detectors, transistors and advanced computing devices. In this talk we will focus on examining the role that the organic cation can play in introducing or impacting chirality, symmetry breaking and associated phase transitions within HOIPs, as well as on the resulting chiroptical (e.g., circularly dichroism),<sup>2</sup> spin-selective charge transport (e.g., chirality-induced spin selectivity),<sup>3</sup> and electronic structure (e.g., spin splitting of the conduction band)<sup>4</sup> characteristics of these systems. Recent examples of such symmetry-related tunability highlight the promise of using the organic component to control light, charge and spin within the wide-ranging HOIP family.<br/><br/>1. D. B. Mitzi, K. Chondroudis, C. R. Kagan, <i>IBM J. Res. & Dev. </i>45, 29 (2001).<br/>2. L. Yan, M. K. Jana, P. C Sercel, D. B. Mitzi, W. You, <i>J. Am. Chem. Soc. </i>143, 18114 (2021).<br/>3. H. Lu, C. Xiao, R. Song, T. Li, A. E. Maughan, A. Levin, R. Brunecky, J. J. Berry, D. B. Mitzi, V. Blum, M. C. Beard, <i>J. Am. Chem. Soc. </i>142, 13030 (2020).<br/>4. M. K. Jana, R. Song, Y. Xie, R. Zhao, P. C. Sercel, V. Blum, D. B. Mitzi, <i>Nature Comm.</i> 12, 4982 (2021).