Efficient Föster energy transfer : from phosphorescent organic molecules to J-aggregate thin film
Name
402670134-MIT.pdf
Description
Full printable version
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24.46 MB
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Checksum (MD5)
ca97f3bed69ba3dde2e2d7223ac68f73
Author(s)
Shirasaki, Yasuhiro
Advisor(s)
Vladimir Bulović.
Date Issued
2008
Publisher
Massachusetts Institute of Technology
Abstract
This thesis demonstrates the first ever use of Forster resonance energy transfer (FRET) to increase the quantum efficiency of a electrically pumped J-aggregate light emitting device (JLED). J-aggregate thin films are highly absorptive films that have potential applications in a new class of optoelectronic devices, known as polaritonic devices. These devices, which utilize strong coupling between light and matter, include room temperature low power optical switches and low threshold lasers. Recent work has shown that a J-aggregate strong-coupling device can be powered not just optically but also electrically. However, since J aggregates are engineered for their optical and not electrical properties, exciting them electrically is very inefficient. JLED efficiency can be improved by first exciting phosphors that readily form excitons and then employing FRET to excite the J aggregates. Attaining high efficiency can make electrical pumping a viable option to power polaritonic devices.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
Includes bibliographical references (p. 53-54).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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