Localized Vibrational Modes of Excitation in Electroluminescent Polymers
JIANG Hao1, XU Xiao-hua1, SUN Xin1,2, K. Yonemitsu3
1T. D. Lee Laboratory and Department of Physics, Fudan University, Shanghai 200433
2National Laboratory of Infrared Physics, Shanghai Institute for Technical Physics, Shanghai 200083
3Institute for Molecular Science, Okazaki 444-8585, Japan
Localized Vibrational Modes of Excitation in Electroluminescent Polymers
JIANG Hao1;XU Xiao-hua1;SUN Xin1,2;K. Yonemitsu3
1T. D. Lee Laboratory and Department of Physics, Fudan University, Shanghai 200433
2National Laboratory of Infrared Physics, Shanghai Institute for Technical Physics, Shanghai 200083
3Institute for Molecular Science, Okazaki 444-8585, Japan
Abstract： The localized vibrational modes of exciton and polaron are investigated, and the results show that the frequencies of the three even parity modes of exciton are very different from those of polaron. For the exciton, three modes are distinctly separated; but, for the polaron, two modes with higher frequencies are close to each other, Then, it is possible to distinguish exciton from polaron by watching their Roman spectra. Therefore, the localized mode may be used to specify the exciton and polaron in the electroluminesent polymers.
1999, Vol. 16 
