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Temperature-depende...
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Yang, JinpengYangzhou Univ, Peoples R China; Inst Mol Sci, Japan
(författare)
Temperature-dependent band structure evolution determined by surface geometry in organic halide perovskite single crystals
- Artikel/kapitelEngelska2020
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AMER PHYSICAL SOC,2020
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LIBRIS-ID:oai:DiVA.org:liu-172098
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-172098URI
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https://doi.org/10.1103/PhysRevB.102.245101DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Funding Agencies|JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [JP26248062, 18H03904]; Qing-Lan Project from Yangzhou University; China Scholarship CouncilChina Scholarship Council
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Organic halide perovskites have attracted much attention due to their potential applications in optoelectronic devices. Since the generally higher flexibility compared to their inorganic counterparts, their structures are prone to be more sensitive toward external effects, where the fundamental understanding of their band structure evolutions is still inconclusive. In this study, different electronic structure evolutions of perovskite single crystals are found via angle-resolved photoelectron spectroscopy: (i) Unchanged top valence band (VB) dispersions under different temperatures can be found in the CH3NH3PbI3. (ii) Phase transitions induced the evolution of top VB dispersions, and even a top VB splitting with Rashba effects can be observed in the CH3NH3PbBr3. Combined with low-energy electron diffraction, metastable atom electron spectroscopy, and density functional theory calculation, we confirm that different band structure evolutions observed in these two perovskite single crystals originated from the cleaved top surface layers, where the different surface geometries with CH3NH3+-I in CH3NH3PbI3 and Pb-Br in CH3NH3PbBr3 are responsible for finding band dispersion change and appearance of the Rashba-type splitting. Such findings suggest that the top surface layer in organic halide perovskites should be carefully considered to create functional interfaces for developing perovskite devices.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Meissner, MatthiasInst Mol Sci, Japan
(författare)
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Yamaguchi, TakumaInst Mol Sci, Japan
(författare)
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Xi, BinYangzhou Univ, Peoples R China
(författare)
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Takahashi, KeishiChiba Univ, Japan
(författare)
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Abdullah, ShedChiba Univ, Japan
(författare)
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Liu, XianjieLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)xiali21
(författare)
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Yoshida, HiroyukiChiba Univ, Japan
(författare)
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Fahlman, MatsLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)matfa21
(författare)
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Kera, SatoshiInst Mol Sci, Japan
(författare)
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Yangzhou Univ, Peoples R China; Inst Mol Sci, JapanInst Mol Sci, Japan
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review B: AMER PHYSICAL SOC102:242469-99502469-9969
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Yang, Jinpeng
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Meissner, Matthi ...
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Yamaguchi, Takum ...
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Xi, Bin
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Takahashi, Keish ...
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Abdullah, Shed
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Liu, Xianjie
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Yoshida, Hiroyuk ...
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Fahlman, Mats
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Kera, Satoshi
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