Enhanced Photoluminescence Quantum Yield, Lifetime, and Photodetector Responsivity of CsPbBr<sub>3</sub> Quantum Dots via Antimony Tribromide Post-Treatment

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dc.contributor.authorSubramaniam, Mohan Raj
dc.contributor.authorPramod, Ashna K.
dc.contributor.authorHevia, Samuel A.
dc.contributor.authorBatabyal, Sudip K.
dc.date.accessioned2025-01-20T22:00:56Z
dc.date.available2025-01-20T22:00:56Z
dc.date.issued2022
dc.description.abstractHerein, we present the synthesis of CsPbBr3 quantum dots (QDs) by a ligand-assisted reprecipitation (LARP) technique under an ambient atmosphere. Besides, the optoelectronic properties of CsPbBr3 QDs were improved through antimony tribromide (SbBr3) post-treatment. Photoluminescence quantum yield (PLQY) was enhanced from 72 to 89% for SbBr3 post-treated QDs compared to as-synthesized QDs. High-resolution transmission electron microscopy (HR-TEM) analysis shows the formation of uniform-size CsPbBr3 QDs (9.4 +/- 1.3 nm) after SbBr3 treatment. The X-ray diffraction (XRD) pattern confirms the presence of the cubic phase of CsPbBr3 QDs before and post-treatment. Moreover, temperature-dependent PL and X-ray photoelectron spectroscopy (XPS) characterizations confirm the effective defect passivation with SbBr3 post-treatment. The time-resolved PL lifetime of CsPbBr3 QDs was enhanced from 24.80 +/- 0.10 to 37.71 +/- 0.09 ns after post-treatment. Finally, the post-treated QD-based self-powered photodetector device showed a high responsivity of 48 mu A/W compared to the as-synthesized QD device's responsivity of 10.2 mu A/W.
dc.description.funderCONICYT-ANID
dc.fuente.origenWOS
dc.identifier.doi10.1021/acs.jpcc.1c07493
dc.identifier.eissn1932-7455
dc.identifier.issn1932-7447
dc.identifier.urihttps://doi.org/10.1021/acs.jpcc.1c07493
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93769
dc.identifier.wosidWOS:000745222300001
dc.issue.numero3
dc.language.isoen
dc.pagina.final1470
dc.pagina.inicio1462
dc.revistaJournal of physical chemistry c
dc.rightsacceso restringido
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleEnhanced Photoluminescence Quantum Yield, Lifetime, and Photodetector Responsivity of CsPbBr<sub>3</sub> Quantum Dots via Antimony Tribromide Post-Treatment
dc.typeartículo
dc.volumen126
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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