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dc.contributor.advisorAkinwande, Dejien
dc.contributor.advisorLu, Nanshuen
dc.creatorChang, Ph. D., Hsiao-Yuen
dc.date.accessioned2015-11-12T16:58:55Zen
dc.date.available2015-11-12T16:58:55Zen
dc.date.issued2015-08en
dc.date.submittedAugust 2015en
dc.identifierdoi:10.15781/T23K98en
dc.identifier.urihttp://hdl.handle.net/2152/32417en
dc.descriptiontexten
dc.description.abstractWhile there has been increasing studies of MoS2 and other two-dimensional (2D) semiconducting dichalcogenides on hard conventional substrates, experimental or analytical studies on flexible substrates has been very limited so far, even though these 2D crystals are understood to have greater prospects for flexible smart systems. In the first part, we report detailed studies of MoS2 transistors on industrial plastic sheets. Failure mechanisms under strain are studied with bending test and stretching test. Experimental investigation identifies that crack formation in the dielectric and the buckling delamination in MoS2 are responsible for the degradation of the device performance. Several approaches to improve device flexibility were discussed. In the second part, electronic transport properties in multilayer MoS2 are investigated with Y-function method. By combining experiments and analysis, we show that the Y-function method offers a robust route for evaluating the low-field mobility, threshold voltage and contact resistance even when the contact is a Schottky-barrier as is common in two-dimensional transistors. In addition, an independent transfer length method (TLM) evaluation corroborates the modified Y-function analysis. The last part, we demonstrate the first RF performance for transferred CVD-grown MoS2 FETs on the flexible substrate. Our result suggests that the large-area CVD-grown MoS2 provides a practical route to realize low-power, high speed electronics circuit applications in the future.en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.subjectMolybdenum disulfideen
dc.subjectTwo-dimensional materialsen
dc.subjectFlexible electronicsen
dc.subjectRFen
dc.subjectMobilityen
dc.subjectContact resistanceen
dc.titleDevice physics and device mechanics for flexible MoS2 thin film transistorsen
dc.typeThesisen
dc.date.updated2015-11-12T16:58:55Zen
dc.contributor.committeeMemberLee, Jacken
dc.contributor.committeeMemberLai, Kejien
dc.contributor.committeeMemberDodabalapur, Ananthen
dc.description.departmentElectrical and Computer Engineeringen
thesis.degree.departmentElectrical and Computer Engineeringen
thesis.degree.disciplineElectrical and Computer engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen


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