TY - JOUR
T1 - Electronic and excitonic structures of inorganic-organic perovskite-type quantum-well crystal (C4H9NH3) 2PbBr4
AU - Tanaka, Kenichiro
AU - Takahashi, Takayuki
AU - Kondo, Takashi
AU - Umeda, Kenichi
AU - Ema, Kazuhiro
AU - Umebayashi, Tsutomu
AU - Asai, Keisuke
AU - Uchida, Kazuhito
AU - Miura, Noboru
PY - 2005/8/5
Y1 - 2005/8/5
N2 - The electronic and excitonic structures of an inorganic-organic perovskite-type quantum-well crystal (C4H9NH 3)2PbBr4 have been investigated by optical absorption, photoluminescence, electroabsorption, two-photon absorption, and magnetoabsorption spectroscopies. Excitons in (C4H9NH 3)2PbBr4 are of the Wannier-type, and ns (n ≥ 2) excitons form an ideal two-dimensional Wannier exciton system. The binding energy, longitudinal-transverse splitting energy, and exchange energy of Is excitons have been determined to be 480, 70 and 31 meV, respectively. These high values originate from both a strong two-dimensional confinement and the image charge effect. These values are larger than those in (C6H 13NH3)2PbI4, owing to the smaller dielectric constant of the well layer in (C4H9NH 3)2PbBr4 than that in (C6H 13NH3)2PbI4. The seemingly unusual electric-field dependence of excitons resonance is also reasonably understood by taking the image charge effect into account.
AB - The electronic and excitonic structures of an inorganic-organic perovskite-type quantum-well crystal (C4H9NH 3)2PbBr4 have been investigated by optical absorption, photoluminescence, electroabsorption, two-photon absorption, and magnetoabsorption spectroscopies. Excitons in (C4H9NH 3)2PbBr4 are of the Wannier-type, and ns (n ≥ 2) excitons form an ideal two-dimensional Wannier exciton system. The binding energy, longitudinal-transverse splitting energy, and exchange energy of Is excitons have been determined to be 480, 70 and 31 meV, respectively. These high values originate from both a strong two-dimensional confinement and the image charge effect. These values are larger than those in (C6H 13NH3)2PbI4, owing to the smaller dielectric constant of the well layer in (C4H9NH 3)2PbBr4 than that in (C6H 13NH3)2PbI4. The seemingly unusual electric-field dependence of excitons resonance is also reasonably understood by taking the image charge effect into account.
KW - Electroabsorption
KW - Image charge effect
KW - Inorganic-organic perovskite-type crystal
KW - Magnetoabsorption
KW - Photoluminescence
KW - Quantum confinement effect
KW - Quantum wells
KW - Two-dimensional excitons
KW - Two-photon absorption
KW - Wannier excitons
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U2 - 10.1143/JJAP.44.5923
DO - 10.1143/JJAP.44.5923
M3 - Article
AN - SCOPUS:31544451822
SN - 0021-4922
VL - 44
SP - 5923
EP - 5932
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 8
ER -