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

研究成果: Conference contribution

4 被引用数 (Scopus)


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.

ホスト出版物のタイトルElectrical, Optical, and Magnetic Properties of Organic Solid State Materials
編集者Anthony F. Garito, Alex K-Y. Jen, Charles Y-C. Lee, Larry R. Dalton
出版社Publ by Materials Research Society
出版ステータスPublished - 1994 1月 1
イベントProceedings of the MRS 1993 Fall Meeting - Boston, MA, USA
継続期間: 1993 11月 291993 12月 3


OtherProceedings of the MRS 1993 Fall Meeting
CityBoston, MA, USA

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料


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