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dc.contributor.authorBarrit, Dounya
dc.contributor.authorZhang, Yalan
dc.contributor.authorTang, Ming-Chun
dc.contributor.authorLi, Ruipeng
dc.contributor.authorSmilgies, Detlef-M.
dc.contributor.authorLiu, Shengzhong (Frank)
dc.contributor.authorAnthopoulos, Thomas D.
dc.contributor.authorAmassian, Aram
dc.contributor.authorZhao, Kui
dc.date.accessioned2021-02-24T06:36:02Z
dc.date.available2021-02-24T06:36:02Z
dc.date.issued2020-10-23
dc.identifier.citationBarrit, D., Zhang, Y., Tang, M.-C., Li, R., Smilgies, D.-M., Liu, S. (Frank), … Zhao, K. (2020). In Situ Investigation and Photovoltaic Devices: Sequential Formation of Tunable-Bandgap Mixed-Halide Lead-based Perovskites. Proceedings of the Online School on Hybrid, Organic and Perovskite Photovoltaics. doi:10.29363/nanoge.hope-pv.2020.018
dc.identifier.doi10.29363/nanoge.hope-pv.2020.018
dc.identifier.urihttp://hdl.handle.net/10754/667631
dc.description.abstractInorganic−organic hybrid perovskite films of MAPb(IxBr1-x)3 (0 ˂ x ˂ 1) represents a path for efficient multi-junction or tandem solar cells due to their tunable bandgap (1.60-2.24 eV). Here, sequential solution deposition is adapted to enable a direct observation and a full understanding of the phase transformation from Pb(IxBr1-x)2 precursors to perovskites. This method has been successfully applied toward the fabrication of homogenous perovskite layers allowing an improvement of optoelectronic properties and device performance. In situ grazing incidence wide-angle X-ray scattering (GIWAXS) measurements are performed to present a detailed view of the effects of solvent, lead halide film solvation, and Br incorporation and alloying on the transformation behavior. Supported by other techniques such as in situ optical reflectance, absorption, x-ray diffraction, and steady-state/time-resolved photoluminescence, the measurements indicate a strong tendency of lead halide solvation prior to crystallization during solution-casting Pb(IxBr1-x)2 precursor from a dimethyl sulfoxide (DMSO) solvent with the Br alloying leading to weakened solvation of Pb(IxBr1-x)2×DMSO. We demonstrate a room temperature conversion of perovskite and high-quality films with tunable bandgap reaching a higher power conversion efficiency of 16.42% based on MAPb(I0.9Br0.1)3 due to highly efficient intramolecular exchange between DMSO molecules and organic cations. These findings highlight the benefits that solvation of the precursor phases, together with bromide incorporation can have on the microstructure, morphology and optoelectronic properties of these films, providing a viable alternative approach to one-step synthesis approach used for mixed ion perovskite thin films.
dc.publisherFundació Scito
dc.relation.urlhttps://www.nanoge.org/proceedings/HOPE-PV/5f906b9b6329f4157f4f0219
dc.rightsArchived with thanks to Fundació Scito
dc.titleIn Situ Investigation and Photovoltaic Devices: Sequential Formation of Tunable-Bandgap Mixed-Halide Lead-based Perovskites
dc.typePresentation
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMaterial Science and Engineering
dc.contributor.departmentKAUST Solar Center (KSC)
dc.conference.dateNov 3-5, 2020
dc.conference.name2nd School on Hybrid, Organic and Perovskite Photovoltaics (HOPE-PV20)
dc.conference.locationOnline
dc.eprint.versionPost-print
dc.contributor.institutionResearch Institute for Solar Energy and New Energies, Green Energy Park, Morocco
dc.contributor.institutionShaanxi Normal University, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Xi’an, China.
dc.contributor.institutionBrookhaven National Laboratory
dc.contributor.institutionCornell University, Cornell High Energy Synchrotron Source (CHESS)
dc.contributor.institutionNorth Carolina State University (NCSU), Department of Materials Science and Engineering, Raleigh
kaust.personBarrit, Dounya
kaust.personTang, Ming-Chun
kaust.personAnthopoulos, Thomas D.


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