Dielectric function and one-dimensional description of the absorption of poly(3-octylthiophene)
作者： U. Zhokhavets , R. Goldhahn , G. Gobsch , W. Schliefke
DOI: 10.1016/S0379-6779(02)00502-7
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摘要: Abstract We have studied the optical properties of poly(3-octylthiophene) (P3OT) thin films, prepared by spin coating, with variable angle spectroscopic ellipsometry (SE). The off-diagonal elements reflection matrix been analysed revealing that films are optically anisotropic axis normal to sample surface, which is a result orientation polymer chains parallel surface. By simultaneously fitting ellipsometric spectra samples, both and perpendicular components dielectric function were obtained. imaginary parts show strong anisotropy (7:1). In addition, one-dimensional density states model was used describe frequency dispersion part in high-energy region. An excellent agreement experiment found, leading fundamental band gap 2.67 eV.
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sci-hub.se 参考文章(23)
Manuel Cardona, Peter Y. Yu, Fundamentals of Semiconductors ,(1995)
Leif A.A. Pettersson, Fredrik Carlsson, Olle Inganäs, Hans Arwin, Spectroscopic ellipsometry studies of the optical properties of doped poly(3,4-ethylenedioxythiophene): an anisotropic metal Thin Solid Films. ,vol. 313, pp. 356- 361 ,(1998) , 10.1016/S0040-6090(97)00846-8
Thomas G. Pedersen, Per M. Johansen, Henrik C. Pedersen, Particle-in-a-box model of one-dimensional excitons in conjugated polymers Physical Review B. ,vol. 61, pp. 10504- 10510 ,(2000) , 10.1103/PHYSREVB.61.10504
R. Rinaldi, R. Cingolani, K. M. Jones, A. A. Baski, H. Morkoc, A. Di Carlo, J. Widany, F. Della Sala, P. Lugli, Scanning tunneling current-voltage spectroscopy on poly(p-phenylene vinylene) films: A nanoscale probe for the electronic conduction Physical Review B. ,vol. 63, pp. 075311- ,(2001) , 10.1103/PHYSREVB.63.075311
K. Sakurai, H. Tachibana, N. Shiga, C. Terakura, M. Matsumoto, Y. Tokura, Experimental determination of excitonic structure in polythiophene Physical Review B. ,vol. 56, pp. 9552- 9556 ,(1997) , 10.1103/PHYSREVB.56.9552
Jingsong Huang, Kaixia Yang, Shiyong Liu, Hongjin Jiang, High-brightness organic double-quantum-well electroluminescent devices Applied Physics Letters. ,vol. 77, pp. 1750- 1752 ,(2000) , 10.1063/1.1311313
Tian-An Chen, Xiaoming Wu, Reuben D. Rieke, Regiocontrolled Synthesis of Poly(3-alkylthiophenes) Mediated by Rieke Zinc: Their Characterization and Solid-State Properties Journal of the American Chemical Society. ,vol. 117, pp. 233- 244 ,(1995) , 10.1021/JA00106A027
R. M. A. Azzam, Stanley S. Ballard, N. M. Bashara, Ellipsometry and polarized light ,(1977)
D Comoretto, G Dellepiane, Franco Marabelli, J Cornil, DA Dos Santos, JL Bredas, D Moses, Optical constants of highly stretch-oriented poly( p -phenylene-vinylene): A joint experimental and theoretical study Physical Review B. ,vol. 62, pp. 10173- 10184 ,(2000) , 10.1103/PHYSREVB.62.10173
Michael Rohlfing, Steven G. Louie, Optical Excitations in Conjugated Polymers Physical Review Letters. ,vol. 82, pp. 1959- 1962 ,(1999) , 10.1103/PHYSREVLETT.82.1959