期刊
SOLID STATE COMMUNICATIONS
卷 122, 期 5, 页码 249-252出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0038-1098(02)00126-6
关键词
quantum wells; optical properties; nonlinear optics
Wannier series excitons have been identified by electroabsorption and two-photon absorption spectroscopy on a layered-perovskite-type Crystal (C6H13NH3)(2)PbI4. 1s, 2s, 2p, 3p excitons are located at 2.34, 2.60, 2.61, and 2.64 eV, respectively. This finding indicates the excitons in this system exhibit a relatively strong two-dimensional character. The large binding energy of the Is exciton (>300 meV) is considerably enhanced by the dielectric confinement effect. (C) 2002 Elsevier Science Ltd. All rights reserved.
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