Operating organic light-emitting diodes imaged by super-resolution spectroscopy
- Univ. of Illinois, Urbana, IL (United States)
- IBS Center for Soft and Living Matter, UNIST, Ulsan (South Korea)
Super-resolution stimulated emission depletion (STED) microscopy is adapted here for materials characterization that would not otherwise be possible. With the example of organic light-emitting diodes (OLEDs), spectral imaging with pixel-by-pixel wavelength discrimination allows us to resolve local-chain environment encoded in the spectral response of the semi-conducting polymer, and correlate chain packing with local electroluminescence by using externally applied current as the excitation source. We observe nanoscopic defects that would be unresolvable by traditional microscopy. They are revealed in electroluminescence maps in operating OLEDs with 50 nm spatial resolution. We find that brightest emission comes from regions with more densely packed chains. Conventional microscopy of an operating OLED would lack the resolution needed to discriminate these features, while traditional methods to resolve nanoscale features generally cannot be performed when the device is operating. As a result, this points the way towards real-time analysis of materials design principles in devices as they actually operate.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- Institute for Basic Science
- Grant/Contract Number:
- FG02-02ER46019
- OSTI ID:
- 1252188
- Alternate ID(s):
- OSTI ID: 1287272
- Journal Information:
- Nature Communications, Vol. 7; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Super-resolution microscopy as a powerful tool to study complex synthetic materials
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journal | January 2019 |
Reflection confocal nanoscopy using a super-oscillatory lens
|
journal | January 2019 |
Reflection confocal nanoscopy using a super-oscillatory lens | text | January 2019 |
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Related Subjects
36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
LED
super-resolution
light-emitting
imaging
in situ
47 OTHER INSTRUMENTATION
conjugated polymers
charge-transport
fluorescence microscopy
interchain interactions
stimulated-emission
morphology
resolution
poly(p-phenylenevinylene)
electroluminescence
conformation