Bulletin of the American Physical Society
2018 Annual Meeting of the APS Four Corners Section
Volume 63, Number 16
Friday–Saturday, October 12–13, 2018; University of Utah, Salt Lake City, Utah
Session G01: Poster Session
5:00 PM,
Friday, October 12, 2018
CSC
Room: 205/206
Chair: David Kieda, University of Utah
Abstract ID: BAPS.2018.4CS.G01.34
Abstract: G01.00034 : Comparison of spin and charge transport in organic semiconductors*
Presenter:
Matthew Groesbeck
(University of Utah, BYU (BS 2013))
Authors:
Matthew Groesbeck
(University of Utah, BYU (BS 2013))
Haoliang Liu
(University of Utah)
Evan Lafalce
(University of Utah)
Dali Sun
(University of Utah)
Hans Malissa
(University of Utah)
Marzieh Kavand
(University of Utah)
Christoph Boehme
(University of Utah)
Zeev Valy Vardeny
(University of Utah)
We have investigated spin and charge transport processes in organic semiconductors (OSECs) in order to compare spin-transport and charge-transport in these materials. For the spin transport we measured the spin diffusion length, λs via the inverse spin Hall effect (ISHE) in NiFe/OSEC/Pt trilayer devices, whereby a pure spin-current is generated in the polymer by spin-pumping from the ferromagnetic layer (NiFe), then diffuses to the Pt layer where it is converted into an electrical signal due to the strong spin-orbit coupling of Pt. For the charge transport we measured the carrier mobility of photogenerated charges via the time of flight technique. We also determined the (longitudinal) spin relaxation time, T2 by pulsed EPR method, which allows us to calculate the spin diffusion coefficient Ds from λs. Finally we relate Ds to the charge diffusion coefficient Dc, which is determined from the charge mobility measurements via the time-of-flight method.
*Supported by NSF (DMR-1404634) and NSF-MRSEC (DMR-1121252) grants
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.4CS.G01.34
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