Circularly Polarized Phosphorescent Electroluminescence with a High Dissymmetry Factor from PHOLEDs Based on a Platinahelicene
Open Access
- 28 July 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 138 (31), 9743-9746
- https://doi.org/10.1021/jacs.6b02463
Abstract
Circularly polarized (CP) light is of interest in areas such as quantum optical computing, optical spintronics, biomedicine and high efficiency displays. Direct emission of CP light from organic light-emitting diodes (OLEDs) has been a focus of research as it has the immediate application of increasing efficiency and simplifying device architecture in OLED based displays. High dissymmetry (gEL) factor values have been reported for devices employing fluorescent polymers, but these CP-OLEDs are limited in their ultimate efficiencies by the type of emissive electronic transitions involved. In contrast, phosphorescent OLEDs (PHOLEDs) can emit light from triplet excited states and can therefore achieve very high efficiencies. However, CP-PHOLEDs are significantly understudied and the two previous reports suffered from very low brightness or gEL values. Here, we use a platinahelicene complex to construct a CP-PHOLED that achieves both a display level brightness and a high gEL factor. The dissymmetry of CP emission reached with this proof-ofconcept single-layer helicene-based device is sufficient to provide real-world benefits over non-polarized emission, and paves the way towards chiral metal complex–based CPPHOLED displaysKeywords
Funding Information
- Engineering and Physical Sciences Research Council (EP/G037515/1, EP/K503733/1, EP/L014580/1)
This publication has 46 references indexed in Scilit:
- Circularly Polarized Luminescence in Chiral Molecules and Supramolecular AssembliesThe Journal of Physical Chemistry Letters, 2015
- Circularly Polarized Luminescence from Simple Organic MoleculesChemistry – A European Journal, 2015
- Dual wavelength asymmetric photochemical synthesis with circularly polarized lightChemical Science, 2015
- Lanthanide Circularly Polarized Luminescence: Bases and ApplicationsChirality, 2014
- Lanthanide Probes for Bioresponsive ImagingChemical Reviews, 2013
- Improving the contrast ratio of OLED displays: An analysis of various techniquesOptical Materials, 2012
- Optical communication of spin information between light emitting diodesApplied Physics Letters, 2011
- Experimental demonstration of a heralded entanglement sourceNature Photonics, 2010
- LIQUID CRYSTAL MATERIALS AND LIQUID CRYSTAL DISPLAYSAnnual Review of Materials Science, 1997
- Asymmetric photochemical reactions in solutionChemical Reviews, 1992