Low temperature microscopy of organic optoelectronic materials Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/c247dt65r

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  • We present a report on a new capability for low temperature microscopy of organic optoelectronic semiconductor materials. We may now perform photoluminescence (PL) and conductivity measurements as a function of temperature on a microscopic level. Testing confirmed the setup's ability to support microscopic measurements at pressures of 10^-6 Torr and temperatures down to 78K. Preliminary results on high performance ADT-TES-F composite materials have been obtained including PL, of single crystals as well as donor-acceptor (D/A) spincast films, and images of microscopic D/A domains under 60-100X magnification. An increase in PL was observed with decreasing temperature in single crystals of ADT-TES-F due to a decrease in thermally activated non-radiative recombination. Microscopic images of spincast D/A composites have yielded evidence of exciplex formation at the grain boundaries, indicative of the presence of charge transfer states in these regions.
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  • description.provenance : Submitted by Mattson Thieme (thiemem@onid.orst.edu) on 2014-06-05T18:06:46Z No. of bitstreams: 1 thesis.pdf: 2820529 bytes, checksum: 65d4b64aa31e4a0afee48b35c03813e9 (MD5)
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