OPTICAL-RESPONSE OF CONJUGATED POLYMERS

被引:15
作者
VERBANDT, Y [1 ]
THIENPONT, H [1 ]
VERETENNICOFF, I [1 ]
RIKKEN, GLJA [1 ]
机构
[1] PHILIPS RES LABS,5600 JA EINDHOVEN,NETHERLANDS
来源
PHYSICAL REVIEW B | 1993年 / 48卷 / 12期
关键词
D O I
10.1103/PhysRevB.48.8651
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a simple model for the description of the linear and nonlinear optical response of conjugated polymers, where the pi electrons are confined in a periodic system composed of anharmonic potential wells. We calculate the optical band gap, the polarizability, and the second hyperpolarizability as a function of the molecular length for the oligomers of thiophene and benzene, adjusting the model parameters to two band-gap measurements. We find them to be in fair agreement with experimental data. Furthermore, the length dependencies are discussed and compared with experimental and theoretical reported values. The model is very suitable for studying the sensitivity of the optical response to conformational disorder.
引用
收藏
页码:8651 / 8657
页数:7
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