Excited states of one-dimensional excitons in polysilanes as investigated by two-photon spectroscopy
- 15 June 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (18) , 14746-14749
- https://doi.org/10.1103/physrevb.43.14746
Abstract
Two-photon-absorption spectra have been investigated for solid films of polysilanes with various Si-backbone conformations such as trans planar, alternating trans-gauche, helical, and disordered forms. In all the polysilanes with ordered backbones, the distinct two-photon-absorption peaks were observed at energies 0.8–1.0 eV above the one-photon-absorption peaks. These one-photon and two-photon transitions are interpreted in terms of the ground and excited states of one-dimensional excitons on the Si backbones.Keywords
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