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Green CO2 Processing for Manipulating Structures and Electrical Properties of Organic Photovoltaic Devices

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dc.contributor.advisor koga, tadanori en_US
dc.contributor.author Sendogdular, Levent en_US
dc.contributor.other Department of Materials Science and Engineering. en_US
dc.date.accessioned 2017-09-20T16:49:54Z
dc.date.available 2017-09-20T16:49:54Z
dc.date.issued 2015-05-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/76280 en_US
dc.description 154 pg. en_US
dc.description.abstract It is known that morphological, optical and electrical properties of polymer-fullerene nanoparticle organic photovoltaic devices (OPVs) are significantly influenced by individual and integrated structures of the components blended together as photovoltaic active layers. In many cases, conventional thermal and solvent annealing processes do not provide robust control over multi-interfacial systems; therefore, the true potentials of OPVs are still limited with these post-processing treatments available up to now. In this thesis, I report alternative use of supercritical CO2 (scCO2) as a low-temperature and green plasticization agent. A poly(3hexylthiophene)-phenyl-C61-butyric acid methyl ester (P3HT-PCBM) blend system was used as a model system, and the effects of various CO2 process conditions, thickness of the blend films, filler concentrations on the structures were investigated by using a suite of surface sensitive techniques including X-ray diffraction, neutron reflectivity, and atomic force microscopy. In addition, I performed conductivity experiments for the scCO2 treated P3HT/PCBM films, demonstrating that the defect densities, charge trap densities, and carrier concentrations are significantly improved by the optimized scCO2 condition. The understanding of the structure-property relationship would lead to development of new polymer-based OPVs. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Materials Science en_US
dc.subject.other bulk heterojunction solar cell, p3ht-pcbm, supercritical co2 en_US
dc.title Green CO2 Processing for Manipulating Structures and Electrical Properties of Organic Photovoltaic Devices en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember sokolov, jonathan en_US
dc.contributor.committeemember venkatesh, t.a. en_US
dc.contributor.committeemember nam, chang-yong. en_US

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