The excited states of light emitting polymers

The experimental and theoretical studies of light emitting polymers described in this chapter suggest that the excited states can be understood as follows  

This is the lowest pseudomomentum branch of the family of n = 1 Mott-Wannier singlet excitons resulting from the Coulomb attraction between the particle-hole excitation from the valence (di) to the conduction d ) bands. 

Higher in energy are the excitations associated with peak II. The chain independent position of this peak, its transverse polarization in PPP and its small oscillator strength all indicate that it derives from the highly correlated state of benzene. Its optical strength arises from the breaking 

The k A state observed by two-photon absorption and photoinduced absorption slightly lower in energy than the state by Frolov et al. (2002) 

We now turn to a discussion of the effects of electron-lattice coupling on the electronic states of light emitting polymers. 

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This chapter has described the spectroscopic and theoretical investigations of the excited states of light emitting polymers. Although the experiments are generally... 

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