Ultralow Self-Doping in 2D Hybrid Perovskite Single Crystals

Handle URI:
http://hdl.handle.net/10754/625170
Title:
Ultralow Self-Doping in 2D Hybrid Perovskite Single Crystals
Authors:
Peng, Wei ( 0000-0002-7168-9795 ) ; Yin, Jun; Ho, Kang Ting ( 0000-0001-6622-8313 ) ; Ouellette, Olivier; de Bastiani, Michele; Banavoth, Murali ( 0000-0002-7806-2274 ) ; El Tall, Omar; Shen, Chao; Miao, Xiao-He; Pan, Jun; Alarousu, Erkki; He, Jr-Hau ( 0000-0003-1886-9241 ) ; Ooi, Boon S. ( 0000-0001-9606-5578 ) ; Mohammed, Omar F. ( 0000-0001-8500-1130 ) ; Sargent, Edward H.; Bakr, Osman M. ( 0000-0002-3428-1002 )
Abstract:
Unintentional self-doping in semiconductors through shallow defects is detrimental to optoelectronic device performance. It adversely affects junction properties and it introduces electronic noise. This is especially acute for solution-processed semiconductors, including hybrid perovskites, which are usually high in defects due to rapid crystallization. Here, we uncover extremely low self-doping concentrations in single crystals of (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 (n=1, 2, and 3)—over three orders of magnitude lower than those of typical three-dimensional hybrid perovskites—by analyzing their conductivity behavior. We propose that crystallization of hybrid perovskites containing large organic cations suppresses defect formation and thus favors a low self-doping level. To exemplify the benefits of this effect, we demonstrate extraordinarily high light-detectivity (1013 Jones) in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 photoconductors due to the reduced electronic noise, which makes them particularly attractive for the detection of weak light signals. Furthermore, the low self-doping concentration reduces the equilibrium charge carrier concentration in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1, advantageous in the design of p-i-n heterojunction solar cells by optimizing band alignment and promoting carrier depletion in the intrinsic perovskite layer, thereby enhancing charge extraction.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Solar Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; KAUST Catalysis Center (KCC); Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Analytical Core Lab; Imaging and Characterization Core Lab
Citation:
Peng W, Yin J, Ho K-T, Ouellette O, De Bastiani M, et al. (2017) Ultralow Self-Doping in 2D Hybrid Perovskite Single Crystals. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b01475.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
Issue Date:
28-Jun-2017
DOI:
10.1021/acs.nanolett.7b01475
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
Financial support for this work was provided by KAUST. W.P. would like to acknowledge Chun Ma at KAUST for his valuable suggestions on the measurement of photodetector noise, Feng Li and Ting-You Li at KAUST for their assistance in measuring temperature-dependent conductivity.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b01475
Appears in Collections:
Articles; Analytical Core Lab; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPeng, Weien
dc.contributor.authorYin, Junen
dc.contributor.authorHo, Kang Tingen
dc.contributor.authorOuellette, Olivieren
dc.contributor.authorde Bastiani, Micheleen
dc.contributor.authorBanavoth, Muralien
dc.contributor.authorEl Tall, Omaren
dc.contributor.authorShen, Chaoen
dc.contributor.authorMiao, Xiao-Heen
dc.contributor.authorPan, Junen
dc.contributor.authorAlarousu, Erkkien
dc.contributor.authorHe, Jr-Hauen
dc.contributor.authorOoi, Boon S.en
dc.contributor.authorMohammed, Omar F.en
dc.contributor.authorSargent, Edward H.en
dc.contributor.authorBakr, Osman M.en
dc.date.accessioned2017-07-06T09:43:06Z-
dc.date.available2017-07-06T09:43:06Z-
dc.date.issued2017-06-28en
dc.identifier.citationPeng W, Yin J, Ho K-T, Ouellette O, De Bastiani M, et al. (2017) Ultralow Self-Doping in 2D Hybrid Perovskite Single Crystals. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b01475.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.doi10.1021/acs.nanolett.7b01475en
dc.identifier.urihttp://hdl.handle.net/10754/625170-
dc.description.abstractUnintentional self-doping in semiconductors through shallow defects is detrimental to optoelectronic device performance. It adversely affects junction properties and it introduces electronic noise. This is especially acute for solution-processed semiconductors, including hybrid perovskites, which are usually high in defects due to rapid crystallization. Here, we uncover extremely low self-doping concentrations in single crystals of (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 (n=1, 2, and 3)—over three orders of magnitude lower than those of typical three-dimensional hybrid perovskites—by analyzing their conductivity behavior. We propose that crystallization of hybrid perovskites containing large organic cations suppresses defect formation and thus favors a low self-doping level. To exemplify the benefits of this effect, we demonstrate extraordinarily high light-detectivity (1013 Jones) in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 photoconductors due to the reduced electronic noise, which makes them particularly attractive for the detection of weak light signals. Furthermore, the low self-doping concentration reduces the equilibrium charge carrier concentration in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1, advantageous in the design of p-i-n heterojunction solar cells by optimizing band alignment and promoting carrier depletion in the intrinsic perovskite layer, thereby enhancing charge extraction.en
dc.description.sponsorshipFinancial support for this work was provided by KAUST. W.P. would like to acknowledge Chun Ma at KAUST for his valuable suggestions on the measurement of photodetector noise, Feng Li and Ting-You Li at KAUST for their assistance in measuring temperature-dependent conductivity.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b01475en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b01475.en
dc.subjecttwo-dimensional hybrid perovskitesen
dc.subjectshallow defectsen
dc.subjectunintentional selfdopingen
dc.subjectphotodetectoren
dc.subjectsingle crystalsen
dc.titleUltralow Self-Doping in 2D Hybrid Perovskite Single Crystalsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Solar Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabiaen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentAnalytical Core Laben
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalNano Lettersen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Toronto, Ontario M5S 3G4, Canadaen
kaust.authorPeng, Weien
kaust.authorYin, Junen
kaust.authorHo, Kang Tingen
kaust.authorde Bastiani, Micheleen
kaust.authorBanavoth, Muralien
kaust.authorEl Tall, Omaren
kaust.authorShen, Chaoen
kaust.authorMiao, Xiao-Heen
kaust.authorPan, Junen
kaust.authorAlarousu, Erkkien
kaust.authorHe, Jr-Hauen
kaust.authorOoi, Boon S.en
kaust.authorMohammed, Omar F.en
kaust.authorBakr, Osman M.en
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