Organic multilayer photoconductor utilizing a spacer layer
Name
630153413-MIT.pdf
Description
Full printable version
Size
6.9 MB
Format
Adobe PDF
Checksum (MD5)
5d6a788842d982b965b14f0a2cbd073f
Author(s)
Rowehl, Jill A. (Jill Annette)
Advisor(s)
Vladimir Bulovic.
Date Issued
2008
Publisher
Massachusetts Institute of Technology
Abstract
Chemosensors hold many vital applications in today's world, particularly as detectors for explosives. There is still vast room for improvement as other technologies-particularly those of explosives-continue to evolve and expand. Herein, we develop a novel device structure with the potential for much higher sensitivity. The lateral bilayer photoconductor is comprised of an exciton generation layer (EGL) and a charge transport layer (CTL). This separates the functionality of chemical sensing from the charge transport, allowing each film to be independently optimized. As a further improvement on this structure, we introduce a spacer layer to separate charge carriers in the EGL and the CTL, reducing bimolecular recombination at the interface. As a proof of concept, we fabricate and characterize lateral multilayer photoconductors composed of small molecule organic films. It is experimentally demonstrated that the utilization of a spacer layer can produce an order of magnitude enhancement in quantum efficiency over the of a spacer layer can produce an order of magnitude enhancement in quantum efficiency over the The work reported here provides encouraging results in the fields of chemosensors and organic optoelectronics.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 61-62).
Subjects
Materials Science and Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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