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dc.contributor.advisorLaquai, Frédéric
dc.contributor.authorAlsufyani, Wejdan
dc.date.accessioned2019-12-10T12:32:47Z
dc.date.available2019-12-10T12:32:47Z
dc.date.issued2019-12-03
dc.identifier.citationAlsufyani, W. (2019). Spectroscopy of Charge-Transfer States in Non-fullerene Acceptor Organic Solar Cells. KAUST Research Repository. https://doi.org/10.25781/KAUST-68T13
dc.identifier.doi10.25781/KAUST-68T13
dc.identifier.urihttp://hdl.handle.net/10754/660504
dc.description.abstractThe performance of non-fullerene acceptor (NFA)- based organic solar cells (OSC) has shown continuous increase in recent years, reaching power-conversion efficiencies up to 17% through the design and synthesis of efficient acceptor materials. Recent research is directed towards achieving higher efficiency of OSC, which is limited by the open-circuit voltage (Voc) which is lower than the Voc values achieved in inorganic or perovskites solar cells with comparable bandgaps. In this work, voltage losses in NFA based OSC were calculated by investigating charge-transfer state energy (ECT) using electroluminescence spectroscopy and sensitive external quantum efficiency in three polymer:non-fullerene bulk heterojunction solar cells. PCE10:ITIC device acquired the highest ECT with a Voc of 0.82V, and a a power conversion efficiency (PCE) of 7.91%. While PCE10:O-IDTBR obtained the highest Voc of 1.03V, a PCE of 8.02% compared to PCE10:O-IDTBCN solar cell that has a lower Voc of 0.73V with a PCE of 7.98%. Both radiative and non-radiative voltage losses were calculated. In this thesis, the high open circuit voltage of PCE10:O-IDTBR is explained by the low non-radiative voltage losses compared to PCE10:O-IDTBCN and PCE10:ITIC devices.
dc.language.isoen
dc.subjectCharge-transfer state
dc.subjectnon-fullerene acceptor
dc.subjectorganic solar cells
dc.subjectopen-circuit voltage
dc.subjectSensitive EQE
dc.subjectelectroluminescence
dc.titleSpectroscopy of Charge-Transfer States in Non-fullerene Acceptor Organic Solar Cells
dc.typeThesis
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberAnthopoulos, Thomas D.
dc.contributor.committeememberInal, Sahika
thesis.degree.disciplineMaterial Science and Engineering
thesis.degree.nameMaster of Science
refterms.dateFOA2019-12-10T12:32:47Z
kaust.request.doiyes


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