Polaron self-localization in white-light emitting hybrid perovskites

Handle URI:
http://hdl.handle.net/10754/623892
Title:
Polaron self-localization in white-light emitting hybrid perovskites
Authors:
Cortecchia, Daniele; Yin, Jun; Bruno, Annalisa; Lo, Shu Zee Alencious; Gurzadyan, Gagik G.; Mhaisalkar, Subodh; Brédas, Jean Luc; Soci, Cesare
Abstract:
Two-dimensional (2D) perovskites with the general formula APbX are attracting increasing interest as solution processable, white-light emissive materials. Recent studies have shown that their broadband emission is related to the formation of intra-gap colour centres. Here, we provide an in-depth description of the charge localization sites underlying the generation of such radiative centres and their corresponding decay dynamics, highlighting the formation of small polarons trapped within their lattice distortion field. Using a combination of spectroscopic techniques and first-principles calculations to study the white-light emitting 2D perovskites (EDBE)PbCl and (EDBE)PbBr, we infer the formation of Pb , Pb, and X (where X = Cl or Br) species confined within the inorganic perovskite framework. Due to strong Coulombic interactions, these species retain their original excitonic character and form self-trapped polaron-excitons acting as radiative colour centres. These findings are expected to be relevant for a broad class of white-light emitting perovskites with large polaron relaxation energy.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Cortecchia D, Yin J, Bruno A, Lo S-ZA, Gurzadyan GG, et al. (2017) Polaron self-localization in white-light emitting hybrid perovskites. J Mater Chem C 5: 2771–2780. Available: http://dx.doi.org/10.1039/c7tc00366h.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. C
Issue Date:
3-Feb-2017
DOI:
10.1039/c7tc00366h
Type:
Article
ISSN:
2050-7526; 2050-7534
Sponsors:
We thank Ting Ting for help with Raman measurements. Research at NTU was supported by the Ministry of Education (ref. No. MOE2013-T2-1-044 and MOE2011-T3-1-005) and the National Research Foundation (ref. No. NRF-CRP14-2014-03) of Singapore. JY and JLB acknowledge support from the King Abdullah University of Science and Technology and thank the IT Research Computing Team and Supercomputing Laboratory at KAUST for computational and storage resources.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2017/TC/C7TC00366H#!divAbstract
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCortecchia, Danieleen
dc.contributor.authorYin, Junen
dc.contributor.authorBruno, Annalisaen
dc.contributor.authorLo, Shu Zee Alenciousen
dc.contributor.authorGurzadyan, Gagik G.en
dc.contributor.authorMhaisalkar, Subodhen
dc.contributor.authorBrédas, Jean Lucen
dc.contributor.authorSoci, Cesareen
dc.date.accessioned2017-05-31T11:23:12Z-
dc.date.available2017-05-31T11:23:12Z-
dc.date.issued2017-02-03en
dc.identifier.citationCortecchia D, Yin J, Bruno A, Lo S-ZA, Gurzadyan GG, et al. (2017) Polaron self-localization in white-light emitting hybrid perovskites. J Mater Chem C 5: 2771–2780. Available: http://dx.doi.org/10.1039/c7tc00366h.en
dc.identifier.issn2050-7526en
dc.identifier.issn2050-7534en
dc.identifier.doi10.1039/c7tc00366hen
dc.identifier.urihttp://hdl.handle.net/10754/623892-
dc.description.abstractTwo-dimensional (2D) perovskites with the general formula APbX are attracting increasing interest as solution processable, white-light emissive materials. Recent studies have shown that their broadband emission is related to the formation of intra-gap colour centres. Here, we provide an in-depth description of the charge localization sites underlying the generation of such radiative centres and their corresponding decay dynamics, highlighting the formation of small polarons trapped within their lattice distortion field. Using a combination of spectroscopic techniques and first-principles calculations to study the white-light emitting 2D perovskites (EDBE)PbCl and (EDBE)PbBr, we infer the formation of Pb , Pb, and X (where X = Cl or Br) species confined within the inorganic perovskite framework. Due to strong Coulombic interactions, these species retain their original excitonic character and form self-trapped polaron-excitons acting as radiative colour centres. These findings are expected to be relevant for a broad class of white-light emitting perovskites with large polaron relaxation energy.en
dc.description.sponsorshipWe thank Ting Ting for help with Raman measurements. Research at NTU was supported by the Ministry of Education (ref. No. MOE2013-T2-1-044 and MOE2011-T3-1-005) and the National Research Foundation (ref. No. NRF-CRP14-2014-03) of Singapore. JY and JLB acknowledge support from the King Abdullah University of Science and Technology and thank the IT Research Computing Team and Supercomputing Laboratory at KAUST for computational and storage resources.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2017/TC/C7TC00366H#!divAbstracten
dc.titlePolaron self-localization in white-light emitting hybrid perovskitesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJ. Mater. Chem. Cen
dc.contributor.institutionInterdisciplinary Graduate School, Nanyang Technological University, Singapore, 639798, , Singaporeen
dc.contributor.institutionEnergy Research Institute at NTU (ERI at N), Research Techno Plaza, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, , Singaporeen
dc.contributor.institutionDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, , Singaporeen
dc.contributor.institutionInstitute of Artificial Photosynthesis, State Key Laboratory of Fine Chemicals F-209, Dalian University of Technology, Dalian, 116024, , Chinaen
dc.contributor.institutionCentre for Disruptive Photonic Technologies, TPI, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, , Singaporeen
kaust.authorYin, Junen
kaust.authorBrédas, Jean Lucen
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