Theory of electronic states and excitations in PPV

被引:23
作者
Brazovskii, S [1 ]
Kirova, N
Bishop, AR
机构
[1] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
[2] Univ Calif Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA
[3] Univ Paris Sud, CNRS, Phys Solides Lab, F-91405 Orsay, France
关键词
D O I
10.1016/S0925-3467(97)00120-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a consistent theoritical picture for optical properties of phenyl based polymers, especially for the PPV family. The model is based upon an analytical solution for the band structure of PPV oligomers, while invoking the dominant Coulomb corrections for electron-hole interactions. The adjustable parameters are only the common shift for the bands centers of gravity and a dielectric susceptibility at small distances. Our picture gives a clear understanding for the origin of all possible transitions in linear and nonlinear optics. We describe both tightly bound localized excitons and excitons of intermediate range (i.e. of both the Frenkel and Wannier-Mott types). The quantitative description of excitons is obtained from the long range Coulomb interactions. We emphasize where the ring torsion plays a role in the overall energy minimization of the excited state. This article provides theory details for the joint article [S. Brazovskii, N. Kirova, A.R. Bishop, V. Klimov, D. McBranch, N. N. Barashkov, J.P. Ferraris, Opt. Mater. 9 (1998) 472], where a complete picture was outlined. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:465 / 471
页数:7
相关论文
共 13 条
[2]   Excitations and optical properties of phenylene-based conjugated polymers and oligomers [J].
Brazovskii, S ;
Kirova, N ;
Bishop, AR ;
Klimov, V ;
McBranch, D ;
Barashkov, NN ;
Ferraris, JP .
OPTICAL MATERIALS, 1998, 9 (1-4) :472-479
[3]  
BRAZOVSKII S, 1984, SOV SCI REV A, P94
[4]   THEORETICAL INVESTIGATION OF THE EFFECT OF DOPING ON THE ELECTRONIC-PROPERTIES OF POLYPARAPHENYLENE VINYLENE [J].
BREDAS, JL ;
BELJONNE, D ;
SHUAI, Z ;
TOUSSAINT, JM .
SYNTHETIC METALS, 1991, 43 (03) :3743-3746
[5]   Optical absorption in the substituted phenylene-based conjugated polymers: Theory and experiment [J].
Chandross, M ;
Mazumdar, S ;
Liess, M ;
Lane, PA ;
Vardeny, ZV ;
Hamaguchi, M ;
Yoshino, K .
PHYSICAL REVIEW B, 1997, 55 (03) :1486-1496
[6]   EXCITONS IN POLY(PARA-PHENYLENEVINYLENE) [J].
CHANDROSS, M ;
MAZUMDAR, S ;
JEGLINSKI, S ;
WEI, X ;
VARDENY, ZV ;
KWOCK, EW ;
MILLER, TM .
PHYSICAL REVIEW B, 1994, 50 (19) :14702-14705
[7]   OPTICAL ABSORPTIONS IN POLY(PARA-PHENYLENE VINYLENE) AND POLY(2,5-DIMETHOXY-1,4-PARAPHENYLENE VINYLENE) OLIGOMERS [J].
CORNIL, J ;
BELJONNE, D ;
FRIEND, RH ;
BREDAS, JL .
CHEMICAL PHYSICS LETTERS, 1994, 223 (1-2) :82-88
[8]   CHARGE-CONJUGATION SYMMETRY-BREAKING AND THE ABSORPTION-SPECTRA OF POLYPHENYLENES [J].
GARTSTEIN, YN ;
RICE, MJ ;
CONWELL, EM .
PHYSICAL REVIEW B, 1995, 51 (08) :5546-5549
[9]  
MATVEENKO S, 1986, SOV PHYS JETP, V59, P1049
[10]  
PARR G, 1963, QUANTUM THEORY MOL E