ESR, Raman scattering, and photoluminescence studies polyacenic conducting polymer

Yichun Liu; Xuying Qi; X. Xing

doi:10.1117/12.59301

14 May 1992 ESR, Raman scattering, and photoluminescence studies polyacenic conducting polymer

Yichun Liu, Xuying Qi, X. Xing

Proceedings Volume 1636, Applied Spectroscopy in Materials Science II; (1992) https://doi.org/10.1117/12.59301
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

Basing on the results of the ESR, RS and PL, we propose the following structural model for polyacenic conducting polymer prepared by pyrolysis of model phenolformaldhyde (PF). Sample is consist of condense aromatic rings in short range order in which sp² and sp³ two phase carbon exist. Small sp² cluster will directly couple forming extented larger sp² cluster by carbonating and nucleating with the rise of Tp. The stability of sp³ bond is bad so that it would easily change to the stable sp² bond in condense aromatic rings. The weight of the sp³ bond carbon get small with Tp rising. On the other hand, larger size sp² cluster form resulting in electrical conductivity increasing and thermal active energies decreasing. We suggest that the size of the condense aromatic rings is proporational to Tp. Small (large) cluster has large (small) optical gap. PL spectra shift to lower energies with the rise of Tp. The PL intensity of the samples is correlated with the content of hydrogan, the number of the dangling bonds and the weight of the sp³ bond carbon.

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Yichun Liu, Xuying Qi, and X. Xing "ESR, Raman scattering, and photoluminescence studies polyacenic conducting polymer", Proc. SPIE 1636, Applied Spectroscopy in Materials Science II, (14 May 1992); https://doi.org/10.1117/12.59301

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