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dc.contributor.advisorSivananthan, Sivalingamen_US
dc.contributor.authorColegrove, Ericen_US
dc.date.accessioned2014-06-20T17:51:53Z
dc.date.available2014-06-20T17:51:53Z
dc.date.created2014-05en_US
dc.date.issued2014-06-20
dc.date.submitted2014-05en_US
dc.identifier.urihttp://hdl.handle.net/10027/18838
dc.description.abstractModel CdTe systems –both single-crystalline (sx) and poly-crystalline (px) –are investigated experimentally as a means to understand the role of competing material properties and processing steps in improving the performance of standard thin-film solar cells. Previous device optimization work is reviewed explaining the close space sublimation growth technique and ongoing analysis using scanning transmission electron microscopy. This is followed by motivation for molecular beam epitaxy (MBE) growth studies of CdTe and the results of fundamental material investigations. The results show that (a) the minority carrier lifetimes in hetero-epitaxial layers is limited by surface recombination, (b) source selection and anneals can be tuned to achieve p-type carrier density of 6x1015 cm-3, and (c) counter-intuitively, the increase in p-density is associated with increased mobility in lower crystal quality samples, suggesting the role of anneal. Finally, controlled and re-growth of px-CdTe by MBE studies are discussed with results indicating that shorter lifetimes are directly correlated with the increased surface/interface density.en_US
dc.language.isoenen_US
dc.rightsen_US
dc.rightsCopyright 2014 Eric Colegroveen_US
dc.subjectMolecular Beam Epitaxy (MBE)en_US
dc.subjectClose Space Sublimation (CSS)en_US
dc.subjectCdTeen_US
dc.subjectthin-film photovoltaicsen_US
dc.subjectsolaren_US
dc.subjectheteroepitaxyen_US
dc.subjectpolycrystallineen_US
dc.subjectsingle crystalen_US
dc.subjectp-typeen_US
dc.subjectarsenic dopingen_US
dc.titleFundamental Investigations of CdTe Deposited by MBE for Applications in Thin-Film Solar Photovoltaicsen_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplinePhysicsen_US
thesis.degree.grantorUniversity of Illinois at Chicagoen_US
thesis.degree.levelDoctoralen_US
thesis.degree.namePhD, Doctor of Philosophyen_US
dc.type.genrethesisen_US
dc.contributor.committeeMemberKlie, Roberten_US
dc.contributor.committeeMemberGrein, Christophen_US
dc.contributor.committeeMemberKodama, Richarden_US
dc.contributor.committeeMemberDhere, Rameshen_US
dc.contributor.committeeMemberGessert, Timothyen_US
dc.type.materialtexten_US


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