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Wide Field Magnetic Luminescence Imaging
Author(s) -
Hodges Matthew P. P.,
Grell Martin,
Morley Nicola A.,
Allwood Dan A.
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201606613
Subject(s) - tetracene , materials science , photoluminescence , rubrene , luminescence , magnetic field , pentacene , thin film , organic semiconductor , optoelectronics , singlet fission , exciton , nanotechnology , singlet state , condensed matter physics , photochemistry , atomic physics , chemistry , physics , anthracene , layer (electronics) , quantum mechanics , excited state , thin film transistor
This study demonstrates how magnetic‐field‐dependent luminescence from organic films can be used to image the magnetic configuration of an underlying sample. The organic semiconductors tetracene and rubrene exhibit singlet exciton fission, which is a process sensitive to magnetic fields. Here, thin films of these materials were characterized using photoluminescence spectrometry, atomic force microscopy, and photoluminescence magnetometry. The luminescence from these substrate‐bound thin films is imaged to reveal the magnetic configuration of underlying Nd‐Fe‐B magnets. The tendency of rubrene to form amorphous films and produce large changes in photoluminescence under an applied magnetic field makes it more appropriate for magnetic field imaging than tetracene. This demonstration can be extended in the future to allow simple microscopic imaging of magnetic structure.