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Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts
Published on: March 8, 2017
Electroluminescence from nanoscale materials via field-driven ionization.
Vanessa Wood1, Matthew J Panzer, Deniz Bozyigit
1Department of Information Technology and Electrical Engineering ETH Zurich, 35 Gloriastrasse, 8092 Zurich Switzerland.
Nano Letters
|June 18, 2011
Summary
This study demonstrates electroluminescence in disordered nanoscale materials by locally generating charge, bypassing traditional electrode injection limitations. This method enables light emission from materials previously unsuitable for direct current excitation.
Area of Science:
- Materials Science
- Nanoscience
- Optoelectronics
Background:
- Disordered nanoscale materials present challenges for charge injection and transport.
- Existing thin-film devices often require efficient charge carrier injection from electrodes.
Purpose of the Study:
- To demonstrate electroluminescence in disordered nanoscale materials.
- To overcome limitations of charge injection from electrodes.
- To investigate a novel mechanism for charge generation and light emission.
Main Methods:
- Fabrication of thin films from disordered nanoscale materials.
- Development of a local charge generation technique.
- Electroluminescence measurements (time-averaged and time-resolved).
Main Results:
- Achieved electroluminescence through local charge generation, independent of electrode injection.
- Demonstrated electroluminescence in materials not supporting direct current excitation.
- Proposed a mechanism for charge generation and electroluminescence consistent with observations.
Conclusions:
- Local charge generation is a viable strategy for electroluminescence in disordered nanomaterials.
- This approach expands the range of materials usable for electroluminescent devices.
- The proposed mechanism provides insight into charge dynamics in such systems.
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