Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals
Resumo
We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI₃ perovskite nanocrystals prepared by colloidal synthesis and measure the anisotropic exchange splitting of exciton levels in the nanocrystals. From the experimental data at low temperature (2 K), we obtain the average value of anisotropic splitting of bright exciton states of the order of 120 μeV. Our calculations demonstrate that there is a significant contribution to the splitting due to the nanocrystal shape anisotropy for all inorganic perovskite nanocrystrals.
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Como citar
@article{phys-rev-b-2018,
author = {Nestoklon, M. O. and Goupalov, S. V. and Dzhioev, R. I. and Ken, O. S. and Korenev, V. L. and Kusrayev, Yu. G. and Sapega, V. F. and de Weerd, C. and Gomez, L. and Gregorkiewicz, T. and Lin, Junhao and Suenaga, Kazutomo and Fujiwara, Yasufumi and Matyushkin, L. B. and Yassievich, I. N.},
title = {Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals},
journal = {Physical Review B},
volume = {97},
number = {23},
pages = {235304},
year = {2018},
doi = {10.1103/physrevb.97.235304}
}