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Proceedings Paper

Spin-dependent spectroscopy of photoexcitations in conducting polymers and fullerenes
Author(s): Xing Wei; Z. Valy Vardeny; Bret C. Hess
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Paper Abstract

We have used the novel technique of absorption detected magnetic resonance (ADMR) to investigate the photoexcitation properties in conducting polymers and fullerene C60 films. In conducting polymers we have identified both charged and neutral long-lived photoexcitations with distinct different properties in polymers with degenerate (trans polyacetylene; t-(CH)x) and nondegenerate (polyparaphenylene vinylene; PPV) ground state backbone structure. In t-(CH)x the photocarriers are charged solitons and the neutral photoexcitations are spin ½ soliton pairs, whereas the photoexcitations in PPV form charge bipolarons and triplet excitons. The neutral photoexcitations in C60/polystyrene "glass" are triplet excitons identified in ADMR through the triplet "powder-pattern" around g = 2.003.

Paper Details

Date Published: 14 May 1992
PDF: 10 pages
Proc. SPIE 1636, Applied Spectroscopy in Materials Science II, (14 May 1992); doi: 10.1117/12.59308
Show Author Affiliations
Xing Wei, Univ. of Utah (United States)
Z. Valy Vardeny, Univ. of Utah (United States)
Bret C. Hess, California State Univ./Fresno (United States)

Published in SPIE Proceedings Vol. 1636:
Applied Spectroscopy in Materials Science II
William G. Golden, Editor(s)

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