Document Type
Journal Article
Publisher
American Institute of Physics
Faculty
Faculty of Health, Engineering and Science
School
Electron Science Research Institute
RAS ID
18604
Abstract
The research field of organic spintronics has remarkably and rapidly become a promising research area for delivering a range of high-performance devices, such as magnetic-field sensors, spin valves, and magnetically modulated organic light emitting devices (OLEDs). Plenty of microscopic physical and chemical models based on exciton or charge interactions have been proposed to explain organic magneto-optoelectronic phenomena. However, the simultaneous observation of singlet- and triplet-exciton variations in an external magnetic field is still unfeasible, preventing a thorough theoretical description of the spin dynamics in organic semiconductors. Here, we show that we can simultaneously observe variations of singlet excitons and triplet excitons in an external magnetic field, by designing an OLED structure employing a singlet-exciton filtering and detection layer in conjunction with a separate triplet-exciton detection layer. This OLED structure enables the observation of a Lorentzian and a non-Lorentzian line-shape magnetoresponse for singlet excitons and triplet excitons, respectively.
DOI
10.1063/1.4890315
Access Rights
free_to_read
Comments
This is an Author's Accepted Manuscript of: Ding B., Alameh K. (2014). Simultaneous monitoring of singlet and triplet exciton variations in solid organic semiconductors driven by an external static magnetic field. Applied Physics Letters, 105(1). Available here