Thermal and disorder broadening of excited states in polydiacetylene: 4BCMU

Gerhard Weiser; S. Moeller; A. Horvath; Claudette Lapersonne-Meyer; Michel Schott

doi:10.1117/12.279292

1 December 1997 Thermal and disorder broadening of excited states in polydiacetylene: 4BCMU

Gerhard Weiser, S. Moeller, A. Horvath, Claudette Lapersonne-Meyer, Michel Schott

Proceedings Volume 3145, Optical Probes of Conjugated Polymers; (1997) https://doi.org/10.1117/12.279292
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We present a study of the temperature dependence of absorption and electroabsorption spectra of a thin polydiacetylene single crystal 4BCMU poly[1,7 dodecadiyine- 1,12 diol-bis (4-butoxy carbonyl methyl urethane)] up to 450 K. Comparison with spectra of single chains diluted in a monomer single crystal reveals that the polymerization induces strong inhomogeneous broadening leading to two types of chains with exciton transition energies at 2 eV and 2.3 eV, respectively. Chains with transition energy at 2 eV transform into the other species near 380 K. The Stark effect of the excitons remains unchanged until the crystal is heated to 450 K where the spectra transform into the shape observed in spin cast films. These changes of the spectra are discussed in relation to the increasing disorder in the sample.

Citation Download Citation

Gerhard Weiser, S. Moeller, A. Horvath, Claudette Lapersonne-Meyer, and Michel Schott "Thermal and disorder broadening of excited states in polydiacetylene: 4BCMU", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); https://doi.org/10.1117/12.279292

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