Optical studies of spin coherence in organic semiconductors

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Vardeny, Zeev Valentine
Other Author Yang, C.; Liu, C.
Title Optical studies of spin coherence in organic semiconductors
Date 2005
Description Spin coherence in organic oligomer and polymer semiconductors is a crucial property in determining the performance of organic spin devices. Using the techniques of photo-induced absorption (PA) detected magnetic resonance (PADMR) and photoluminescence (PL) detected magnetic resonance (PLDMR), we have studied the influence of temperature, conjugation length, excitation energy, magnetic nano-particles mixing, and in-chain heavy metal atoms on the spin coherence in organic semiconductors. From the PADMR measurements in addition, we could infer the formation ratio of singlet/triplet excitons from electron-hole pairs in these materials, and found that the formation of singlet excitons is preferred in polymers. We also found that spin randomization induced by magnetic nanoparticles or heavy atoms lead to faster polaron recombination dynamics and lack of optically detected magnetic resonance signal.
Type Text
Publisher American Institute of Physics (AIP)
Volume 772
First Page 1407
Last Page 1408
DOI 10.1063/1.1994641
citatation_issn 0094243X
Subject Spin coherence; Organic spin devices
Subject LCSH Organic semiconductors -- Optical properties
Language eng
Conference Title PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors - ICPS-27; 26-30 July 2004; Flagstaff, Arizona (USA)
Bibliographic Citation Yang, C., Liu, C., & Vardeny, Z. V. (2005). Optical studies of spin coherence in organic semiconductors. AIP Conference Proceedings, 772, 1407-8.
Rights Management (c)American Institute of Physics. The following article appeared in Yang, C., Liu, C., & Vardeny, Z. V., AIP Conference Proceedings, 772, 2005 and may be found at http://dx.doi.org/10.1063/1.1994641
Format Medium application/pdf
Format Extent 173,466 bytes
Identifier ir-main,10065
ARK ark:/87278/s64t72rc
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Reference URL https://collections.lib.utah.edu/ark:/87278/s64t72rc
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