Dielectrically confined excitons and polaritons in natural superlattices - Perovskite lead iodide semiconductors

N. A. Gippius, E. A. Muljarov, S. G. Tikhodeev, Teruya Ishihara, L. V. Keldysh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A large class of new layered semiconductors - lead iodide compounds - is of great interest because of possible optoelectronic applications due to pronounced excitonic effects. These compounds may be regarded as naturally grown semiconductor/insulator superlattices, with perovskite lead iodide (semiconductor) layers sandwiched by alkylammonium (insulator) layers. Exciton binding energies and oscillator strength in these structures are enhanced due to the so-called `dielectric confinement' caused by large difference between dielectric constants of adjoining layers. The binding energies, wave functions, & diamagnetic coefficient of excitons in these naturally grown superlattices are calculated with allowance for the image potential and the superlattice structure of the compounds. The localization of excitons in lead iodide layers causes also a strong dependence of a polariton spike in reflection spectra on the polarization of electromagnetic wave. The results obtained are in agreement with the experimental data.

Original languageEnglish
Title of host publicationElectrical, Optical, and Magnetic Properties of Organic Solid State Materials
EditorsAnthony F. Garito, Alex K-Y. Jen, Charles Y-C. Lee, Larry R. Dalton
PublisherPubl by Materials Research Society
Pages775-780
Number of pages6
Volume328
ISBN (Print)1558992278
Publication statusPublished - 1994 Jan 1
Externally publishedYes
EventProceedings of the MRS 1993 Fall Meeting - Boston, MA, USA
Duration: 1993 Nov 291993 Dec 3

Other

OtherProceedings of the MRS 1993 Fall Meeting
CityBoston, MA, USA
Period93/11/2993/12/3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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    Gippius, N. A., Muljarov, E. A., Tikhodeev, S. G., Ishihara, T., & Keldysh, L. V. (1994). Dielectrically confined excitons and polaritons in natural superlattices - Perovskite lead iodide semiconductors. In A. F. Garito, A. K-Y. Jen, C. Y-C. Lee, & L. R. Dalton (Eds.), Electrical, Optical, and Magnetic Properties of Organic Solid State Materials (Vol. 328, pp. 775-780). Publ by Materials Research Society.