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Article: Impact of excitation energy on the excitonic luminescence of cesium lead bromide perovskite nanosheets

TitleImpact of excitation energy on the excitonic luminescence of cesium lead bromide perovskite nanosheets
Authors
KeywordsBromine compounds
Excitation energy
Excitons
Lead compounds
Luminescence
Issue Date2020
PublisherOptical Society of America. The Journal's web site is located at http://www.opticsinfobase.org/current.cfm?journal=3
Citation
Optics Letters, 2020, v. 45 n. 14, p. 3881-3884 How to Cite?
AbstractAn excitation-energy-dependent luminescence phenomenon is reported in cesium lead bromide (CsPbBr3) perovskite nanosheets. At 10 K, the relative integrated luminescence intensity between the trapped exciton (TX) emission and the free exciton (FX) emission shows an interesting tendency with increasing the optical excitation energy from 2.431 eV (510 nm) to 3.758 eV (330 nm). To interpret such phenomenon, we develop a quantitative model on the basis of the biological population growth theory. A good agreement between experiment and theory is obtained. It is thus revealed that the lower capture coefficient of the TX level to the excited excitons via multiphonon emission relative to the FX level shall be the major cause of the observed phenomenon. These findings may help to deepen the current understanding of the complex luminescence mechanisms of these emerging light-emitting materials.
Persistent Identifierhttp://hdl.handle.net/10722/286725
ISSN
2019 Impact Factor: 3.714
2015 SCImago Journal Rankings: 2.397

 

DC FieldValueLanguage
dc.contributor.authorLAO, X-
dc.contributor.authorBAO, Y-
dc.contributor.authorXu, S-
dc.date.accessioned2020-09-04T13:29:28Z-
dc.date.available2020-09-04T13:29:28Z-
dc.date.issued2020-
dc.identifier.citationOptics Letters, 2020, v. 45 n. 14, p. 3881-3884-
dc.identifier.issn0146-9592-
dc.identifier.urihttp://hdl.handle.net/10722/286725-
dc.description.abstractAn excitation-energy-dependent luminescence phenomenon is reported in cesium lead bromide (CsPbBr3) perovskite nanosheets. At 10 K, the relative integrated luminescence intensity between the trapped exciton (TX) emission and the free exciton (FX) emission shows an interesting tendency with increasing the optical excitation energy from 2.431 eV (510 nm) to 3.758 eV (330 nm). To interpret such phenomenon, we develop a quantitative model on the basis of the biological population growth theory. A good agreement between experiment and theory is obtained. It is thus revealed that the lower capture coefficient of the TX level to the excited excitons via multiphonon emission relative to the FX level shall be the major cause of the observed phenomenon. These findings may help to deepen the current understanding of the complex luminescence mechanisms of these emerging light-emitting materials.-
dc.languageeng-
dc.publisherOptical Society of America. The Journal's web site is located at http://www.opticsinfobase.org/current.cfm?journal=3-
dc.relation.ispartofOptics Letters-
dc.rightsOptics Letters. Copyright © Optical Society of America.-
dc.rights© XXXX [year] Optical Society of America]. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.-
dc.subjectBromine compounds-
dc.subjectExcitation energy-
dc.subjectExcitons-
dc.subjectLead compounds-
dc.subjectLuminescence-
dc.titleImpact of excitation energy on the excitonic luminescence of cesium lead bromide perovskite nanosheets-
dc.typeArticle-
dc.identifier.emailXu, S: sjxu@hku.hk-
dc.identifier.authorityXu, S=rp00821-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1364/OL.395119-
dc.identifier.pmid32667309-
dc.identifier.scopuseid_2-s2.0-85088277770-
dc.identifier.hkuros313916-
dc.identifier.volume45-
dc.identifier.issue14-
dc.identifier.spage3881-
dc.identifier.epage3884-
dc.publisher.placeUnited States-

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