抄録
We have investigated photoinduced spectral changes of excitons in inorganic-organic layered semiconductors, (C6 H5 C2 H4 NH3) 2 Pb I4 (PhE- PbI4) and (C6 H13 NH3) 2 PbI4 (C6- PbI4), by means of the subpicosecond pump-probe spectroscopy. The two semiconductors consist of the same inorganic layers and different organic layers. In the two substances, the blueshift and the bleaching of the exciton are observed. It is found that both of the blueshift and the bleaching are considerably stronger in C6- PbI4 than in PhE- PbI4. The weight of the blueshift relative to the bleaching is larger in PhE- PbI4 than in C6- PbI4. These differences are qualitatively explained in terms of the stronger dielectric confinement in C6- PbI4 than in PhE- PbI4 due to the lower dielectric constant of the organic layers in C6- PbI4 than in PhE- PbI4. Delay time dependences of the blueshift and the bleaching and their polarization dependences are understood as being due to the exciton relaxation in the angular momentum space with rates of 2.7 and 4.1 ps-1 for PhE- PbI4 and C6- PbI4, respectively.
| 元の言語 | English |
|---|---|
| 記事番号 | 205306 |
| ジャーナル | Physical Review B - Condensed Matter and Materials Physics |
| 巻 | 71 |
| 発行部数 | 20 |
| DOI | |
| 出版物ステータス | Published - 2005 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Influence of dielectric confinement on excitonic nonlinearity in inorganic-organic layered semiconductors. / Shimizu, Makoto; Fujisawa, Jun Ichi; Hayase, Junko.
：: Physical Review B - Condensed Matter and Materials Physics, 巻 71, 番号 20, 205306, 2005.研究成果: Article
}
TY - JOUR
T1 - Influence of dielectric confinement on excitonic nonlinearity in inorganic-organic layered semiconductors
AU - Shimizu, Makoto
AU - Fujisawa, Jun Ichi
AU - Hayase, Junko
PY - 2005
Y1 - 2005
N2 - We have investigated photoinduced spectral changes of excitons in inorganic-organic layered semiconductors, (C6 H5 C2 H4 NH3) 2 Pb I4 (PhE- PbI4) and (C6 H13 NH3) 2 PbI4 (C6- PbI4), by means of the subpicosecond pump-probe spectroscopy. The two semiconductors consist of the same inorganic layers and different organic layers. In the two substances, the blueshift and the bleaching of the exciton are observed. It is found that both of the blueshift and the bleaching are considerably stronger in C6- PbI4 than in PhE- PbI4. The weight of the blueshift relative to the bleaching is larger in PhE- PbI4 than in C6- PbI4. These differences are qualitatively explained in terms of the stronger dielectric confinement in C6- PbI4 than in PhE- PbI4 due to the lower dielectric constant of the organic layers in C6- PbI4 than in PhE- PbI4. Delay time dependences of the blueshift and the bleaching and their polarization dependences are understood as being due to the exciton relaxation in the angular momentum space with rates of 2.7 and 4.1 ps-1 for PhE- PbI4 and C6- PbI4, respectively.
AB - We have investigated photoinduced spectral changes of excitons in inorganic-organic layered semiconductors, (C6 H5 C2 H4 NH3) 2 Pb I4 (PhE- PbI4) and (C6 H13 NH3) 2 PbI4 (C6- PbI4), by means of the subpicosecond pump-probe spectroscopy. The two semiconductors consist of the same inorganic layers and different organic layers. In the two substances, the blueshift and the bleaching of the exciton are observed. It is found that both of the blueshift and the bleaching are considerably stronger in C6- PbI4 than in PhE- PbI4. The weight of the blueshift relative to the bleaching is larger in PhE- PbI4 than in C6- PbI4. These differences are qualitatively explained in terms of the stronger dielectric confinement in C6- PbI4 than in PhE- PbI4 due to the lower dielectric constant of the organic layers in C6- PbI4 than in PhE- PbI4. Delay time dependences of the blueshift and the bleaching and their polarization dependences are understood as being due to the exciton relaxation in the angular momentum space with rates of 2.7 and 4.1 ps-1 for PhE- PbI4 and C6- PbI4, respectively.
UR - http://www.scopus.com/inward/record.url?scp=28744450570&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevB.71.205306
DO - 10.1103/PhysRevB.71.205306
M3 - Article
AN - SCOPUS:28744450570
VL - 71
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 20
M1 - 205306
ER -