Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.007
Publication date: 7th February 2022
Metal-halide perovskites (MHPs) hold great potential for next-generation optoelectronic technologies due to their remarkable characteristics. While the influence of strain on the intrinsic properties of MHPs is gaining interest, its combined effect with an external electric field has been largely overlooked. Here we perform an electric-field-dependent PL intensity study on heteroepitaxially strained surface guided CsPbBr3 nanowires. We reveal an unexpected linear coupling between the alternating field and the PL intensity with a significant modulation depth (up to 40%), stemming from an induced internal dipole. Low-frequency polarized-Raman spectroscopy shows structural modifications under an external field, associated with the observed polarity. These results reflect the important interplay between an external field and strain in MHPs and offer new insight into the design of novel MHP-based nano-optoelectronics.
Ella Sanders, Tommaso Salzillo, Maor Rosenberg, Omri Bar-Elli, Omer Yaffe, Ernesto Joselevich and Dan Oron
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