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Updated: Apr 23, 2026

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
Organic electronics. Room-temperature coupling between electrical current and nuclear spins in OLEDs
H Malissa1, M Kavand2, D P Waters2
1Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA. hmalissa@physics.utah.edu john.lupton@ur.de boehme@physics.utah.edu.
Abstract:
The effects of external magnetic fields on the electrical conductivity of organic semiconductors have been attributed to hyperfine coupling of the spins of the charge carriers and hydrogen nuclei. We studied this coupling directly by implementation of pulsed electrically detected nuclear magnetic resonance spectroscopy in organic light-emitting diodes (OLEDs). The data revealed a fingerprint of the isotope (protium or deuterium) involved in the coherent spin precession observed in spin-echo envelope modulation. Furthermore, resonant control of the electric current by nuclear spin orientation was achieved with radiofrequency pulses in a double-resonance scheme, implying current control on energy scales one-millionth the magnitude of the thermal energy.
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