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Selection of contact materials to p-type halide perovskite by electronegativity matching
Long, RY; Li, BH; Mi, QX
2020-06-01
Source PublicationAIP ADVANCES
Issue6
SubtypeArticle
AbstractThe performance of perovskite optoelectronic devices depends critically on the contact between the active layer and charge transport materials. To reveal the mechanism of barrier formation on perovskite surfaces, we studied Schottky junctions between various metals and a p-type perovskite CsSnBr3. By constructing slab models of the junction interface and aligning atomic core levels, the contacts between Au/CsSnBr3 and graphite/CsSnBr3 were found to be ohmic, but various other metals produced Schottky junctions with CsSnBr3. These calculation results, supported by x-ray photoelectron spectroscopy measurements, suggest that the barrier height of a metal/CsSnBr3 junction is a linear function of the metal's electronegativity, rather than its work function. By introducing the concept of effective electronegativity for compounds, this trend was extended to a general rule that a suitable transport material should have an effective electronegativity to match that of the perovskite. (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
DOI10.1063/5.0008406
WOS KeywordELECTRONIC-PROPERTIES ; INTERFACE ; EFFICIENCY ; STATES
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
PublisherAMER INST PHYSICS
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28009
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Long, RY,Li, BH,Mi, QX. Selection of contact materials to p-type halide perovskite by electronegativity matching[J]. AIP ADVANCES,2020(6).
APA Long, RY,Li, BH,&Mi, QX.(2020).Selection of contact materials to p-type halide perovskite by electronegativity matching.AIP ADVANCES(6).
MLA Long, RY,et al."Selection of contact materials to p-type halide perovskite by electronegativity matching".AIP ADVANCES .6(2020).
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