Journal Article10.1134/S002136401812007X
Photoinduced Migration of Ions in Optically Resonant Perovskite Nanoparticles
Dmitry Gets,E. Yu Tiguntseva,Alexander S. Berestennikov,T. G. Lyashenko,Anatoly P. Pushkarev,Sergey V. Makarov,Anvar A. Zakhidov,Anvar A. Zakhidov +7 more
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TL;DR: In this paper, the photo-induced process of change in optical properties in resonant hybrid perovskite nanoparticles with a mixed anion composition (MAPbBr1.5I1.
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Abstract: Organic–inorganic perovskites with a mixed anion composition are widely used in solar cells, light-emitting diodes, and nanophotonic structures. Light nanosources based on resonant perovskite nanoparticles are of particular interest. However, perovskites with such a composition demonstrate the light-induced segregation of anions, which leads to a reversible dynamic rearrangement of the optical properties of a material and photoluminescence spectra. In this work, the photoinduced process of change in optical properties in resonant hybrid perovskite nanoparticles with a mixed anion composition (MAPbBr1.5I1.5, where MA = NH3CH
3
+
) has been studied. Comparison with a similar process in a perovskite thin film with a similar composition has shown that the photoinduced migration of halogen ions in a nanoparticle occurs cyclically. This is due to the competition of two processes: the concentration of ions near the boundaries of the particle and migration caused by the gradient of the density of light-generated electron–hole pairs. This effect in resonant nanoparticles makes it possible to obtain optically tunable nanoantennas.
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Citations
Lead-free Semiconductors with High Absorption: Insight into the Optical Properties of K2GeSnBr6 and K2GeSnI6 Halide Double Perovskites
TL;DR: In this paper, the structural, electronic and optical properties for halide double perovskites compounds were studied based on the FP-LAPW method and the previous properties were treated within the (GGA-PBE) and the (mBJ-GGA) approximations.
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The Ising Model of the Hoke Effect in Hybrid Perovskites
TL;DR: The Ising model of segregation of halide ions in hybrid perovskites upon illumination allows obtaining the relationship between the long-range order parameter of segregation and temperature taking into account the interaction of iodide ions fluctuations with an electron-hole pair generated by light as discussed by the authors.
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