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Title: Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4960158· OSTI ID:1467861
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  1. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
  2. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Electrical and Computer Engineering
  3. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy; Univ. of Regensburg (Germany). Inst. of Experimental and Applied Physics

Separating the influence of hyperfine from spin-orbit interactions in spin-dependent carrier recombination and dissociation processes necessitates magnetic resonance spectroscopy over a wide range of frequencies. For this, we have designed compact and versatile coplanar waveguide resonators for continuous-wave electrically detected magnetic resonance and tested these on organic light-emitting diodes. By exploiting both the fundamental and higher-harmonic modes of the resonators, we cover almost five octaves in resonance frequency within a single setup. The measurements with a common π-conjugated polymer as the active material reveal small but non-negligible effects of spin-orbit interactions, which give rise to a broadening of the magnetic resonance spectrum with increasing frequency.

Research Organization:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0000909; 1121252
OSTI ID:
1467861
Alternate ID(s):
OSTI ID: 1321033
Journal Information:
Applied Physics Letters, Vol. 109, Issue 10; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (11)

Electric Field Effects on Photoluminescence‐Detected Magnetic Resonance of a π‐Conjugated Polymer journal January 2020
Using magneto-electroluminescence as a fingerprint to identify the spin polarization and spin–orbit coupling of magnetic nanoparticle doped polymer light emitting diodes journal January 2019
Perdeuteration of poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (d-MEH-PPV): control of microscopic charge-carrier spin–spin coupling and of magnetic-field effects in optoelectronic devices journal January 2020
Development of multi-frequency ESR/EDMR system using a rectangular cavity equipped with waveguide window journal November 2016
Electrically detected magnetic resonance study of barium and nitric oxide treatments of 4H-SiC metal-oxide-semiconductor field-effect transistors journal October 2019
Quantitative inverse spin Hall effect detection via precise control of the driving-field amplitude journal April 2017
OLEDs as models for bird magnetoception: detecting electron spin resonance in geomagnetic fields text January 2019
Perdeuteration of poly[2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylenevinylene] (d-MEH-PPV): control of microscopic charge-carrier spin–spin coupling and of magnetic-field effects in optoelectronic devices text January 2020
Tuning effective hyperfine fields in PEDOT:PSS thin films by doping text January 2018
Magnetically Tunable Organic Semiconductors with Superparamagnetic Nanoparticles preprint January 2019
OLEDs as models for bird magnetoception: detecting electron spin resonance in geomagnetic fields text January 2019