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Long-Lived Photoluminescence of Photostable One-Dimensional Picoperovskites
Maximilian Tomoscheit1,2, Julian Schröer1, Jaskaran Singh Virdee1
1Institute of Physics University of Rostock Rostock Germany.
None:
We study one-dimensional metal halide perovskite crystals encapsulated in single-wall nanotubes, so-called picoperovskites, using optical spectroscopy. Polarized micro-photoluminescence (PL) reveals bright emission from aligned bundles of picoperovskites with clear linear polarization along the bundle axis. This emission is redshifted with respect to bulk perovskite samples using the same constituents. Temperature-dependent, time-resolved micro-PL shows extraordinarily long PL lifetimes of the picoperovskites at low temperatures, reaching several hundred nanoseconds and exceeding those of bulk perovskites by two orders of magnitude.
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