Magneto-optical studies of photoexcitations in C61

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Vardeny, Zeev Valentine
Other Author Leng, J. M.; Wei, X.; Khemani, K. C.; Moses, D.; Wudl, F.
Title Magneto-optical studies of photoexcitations in C61
Date 1993-12
Description We have used a variety of cw optical and optically detected magnetic-resonance techniques to characterize long-lived photoexeitations in methanofullerene (C6 1) as a dispersion in polystyrene glass, at temperatures below 10 K. We identify triplet excitons with zero-field-splitting (ZFS) parameters D = 105 X 10-4 cm -1 and E = 9X10-4 cm-1 . The triplet excitons are characterized by two photoinduced absorption (PA) bands in the triplet manifold at 1.5 and 1.7 eV, both with a lifetime of 160 µsec, and a phosphorescence emission (PL) band with onset at 1.85 eV and a lifetime of 10 µsec. The difference in lifetimes between PA and PL is explained as being due to different recombination kinetics of the triplet sublevels. This and the finite axial symmetry ZFS parameter E=0 compared to E=0 for triplets in C 6 0 show the lower symmetry of triplets in C6 1 , consistent with its postulated distortions from icosahedral symmetry in the ground-state structure.
Type Text
Publisher American Physical Society
Journal Title Physical Review B
Volume 48
Issue 24
First Page 18250
Last Page 18253
DOI 10.1103/PhysRevB.48.18250
citatation_issn 0163-1829
Subject Photoexcitations; C61; Methanofullerene
Subject LCSH Fullerenes -- Optical properties
Language eng
Bibliographic Citation Leng, J. M., Wei, X., Vardeny, Z. V., Khemani, K. C., Moses, D., & Wudl, F. (1993). Magneto-optical studies of photoexcitations in C61. Physical Review B, 48(24), 18250-3.
Rights Management (c) American Physical Society http://dx.doi.org/10.1103/PhysRevB.48.18250
Format Medium application/pdf
Format Extent 388,970 bytes
Identifier ir-main,9725
ARK ark:/87278/s6ns1c6z
Setname ir_uspace
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Reference URL https://collections.lib.utah.edu/ark:/87278/s6ns1c6z