Abstract
Remarkable enhancement of the excitonic binding energy and oscillator strength is demonstrated in PbI-based layered perovskite compounds where quantum well layers of corner sharing PbI6 octahedra are sandwiched by alkylammonium barrier layers with a much smaller dielectric constant. The enhancement is quantitatively explained by the image charge effect. By changing the dimensionality of PbI6 networks, we observe a change in the exciton formation energy from 1.633 eV for three-dimensional networks to 342 eV for zero-dimensional isolated octahedra. This change is mainly ascribed to the quantum confinement effect.
Original language | English |
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Pages (from-to) | 269-274 |
Number of pages | 6 |
Journal | Journal of Luminescence |
Volume | 60-61 |
Issue number | C |
DOIs | |
Publication status | Published - 1994 Apr |
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Chemistry(all)
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics