Characterization of conjugated polymers

These two features of the Raman spectroscopy of conjugated polymers make the correlation between the uv-vis-nir and Raman extremely important. Thus a complete Raman spectroelectrochemical characterization of conjugated polymers requires the registration of Raman spectra, not only as a function of the electrode potential, but also using diiferent excitation lines from... 

J.P. Aime Structural Characterization of Conjugated Polymer Solutions in The Undoped and Doped State in Conjugated Polymers, (Ed.) J.L. Bredas and R. Silbey, Kluwer Academic Publishers, Dordrecht (1991), p. 229. 

Even if pratical applications of organic-based devices in electronics is potentially attractive, one of the most important goal of the electrical characterization of conjugated polymers and oligomers is the analysis and understanding of the charge transport mechanism in these materials. Studies have been performed on temperature... 

UV-vis spectroscopy has been established as a versatile and powerftil tool for the characterization of conjugated polymers. It is a tool that is used to quantitatively determine the extent of ir-orhital overlap in conjugated systems [120]. The extent of the conjugation is directly reflected in the maximum absorption for such systems. This is the manifestation of the tt-tt transition (HOMO/LUMO or bandgap). Consequently, UV-vis can be used to determine information regarding the conformational state and structure of conjugated polymers [120]. 

The following protocol describes the application of LDI and MALDI in characterization of conjugated polymers [7]. 

D. C. Martin, Molecular design, synthesis, and characterization of conjugated polymers for interfacing electronic biomedical devices with living tissue, MRS Commun., 2015, 5(2), 131-153. 

TAN 13a] Tan H., Pan C., Wang G. et ai, Synthesis and characterization of conjugated polymers with main-chain donors and pendent acceptors for dye-sensitized solar cells , RSC Advances, vol. 3, no. 37, pp. 16612-16618, 2013. 

There are some techniques, such as admittance spectroscopy and deep-level transient spectroscopy (DLTS), that are quite powerful in the characterization of deep levels in semiconductors [139]. These techniques have also begun to be used for the characterization of conjugated polymers such as PPV [178] and MEH-PPV [179]. These techniques may permit the determination of several trap parameters such as activation energy, concentration, charge carrier capture cross section, defect donor/acceptor character that can contribute to the chemical identification of the traps. 

Aime, J.-P., "Structural Characterization of Conjugated Polymer Solutions in the Undoped and Doped State", p. 229 in Br6das, J.L. Silbey, R. (Eds.), Conjugated Polymers The Novel Science and technology of Highly Conducting and Nonlinear Optically Active Materials, Kluwer Academic Publishers, Norwell, MA, USA (1991). 

STRUCTURAL CHARACTERIZATION OF CONJUGATED POLYMER SOLUTIONS IN THE UNDOPED AND DOPED STATE... 

STRUCTURAL CHARACTERIZATION OF CONJUGATED POLYMER SOLUTIONS Equation (2-15) allows to calculate the mean square end to end distance of the chain L... 

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