中文版 | English
Title

“Breathing” organic cation to stabilize multiple structures in low-dimensional Ge-, Sn-, and Pb-based hybrid iodide perovskites

Author
Corresponding AuthorMao,Lingling
Publication Years
2022
DOI
Source Title
EISSN
2052-1553
Abstract
Low-dimensional hybrid inorganic-organic perovskites are excellent candidates for stable optoelectronic devices. The dimensionality of these perovskites depends largely on the organic and inorganic compositions, as well as the synthetic conditions. Here, we report five new hybrid iodides, (ETU)GeI, (ETU)GeI, (ETU)SnI, (ETU)PbI, and (ETU)PbI using only one type of organic cation, namely, S-(2-aminoethyl)isothiouronium (ETU). (ETU)GeI and (ETU)SnI belong to the (110)-oriented structure-type with “3 × 3” sawtooth corrugated layers and crystallize in a structure with the orthorhombic space group Pbca. (ETU)GeI crystallizes in a structure with the triclinic space group P1̄, featuring a 2D layered structure with combinations of corner, edge, and face-sharing [GeI] octahedra. For the Pb-based series, (ETU)PbI has the conventional (100) - oriented 2D type whereas (ETU)PbI has a unique 0D structure. Remarkably, the unstable 2D orange-phase (ETU)PbI transforms to a stable 0D yellow phase (ETU)PbI, accompanied by the reduction of the C-S-C angle of the organic cation ETU. The optical band gaps are largely regulated by the diverse types of structure and are in the range of 1.8 eV to 2.8 eV. (ETU)SnI is the only material showing notable photoluminescence at room-temperature. Our work showcases the flexibility of the organic cation in determining the structural dimensionality and provides a new strategy in generating new hybrid materials.
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
First ; Corresponding
WOS Accession No
WOS:000839580500001
EI Accession Number
20223412622144
EI Keywords
Energy gap ; Germanium compounds ; Hybrid materials ; Optoelectronic devices ; Perovskite ; Positive ions ; Tin compounds
ESI Classification Code
Minerals:482.2 ; Optical Devices and Systems:741.3
Scopus EID
2-s2.0-85136298265
Data Source
Scopus
Citation statistics
Cited Times [WOS]:3
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/395629
DepartmentDepartment of Chemistry
Affiliation
1.Department of Chemistry,Southern University of Science and Technology Shenzhen,Guangdong,518055,China
2.Materials Research Laboratory and Materials Department,University of California,Santa Barbara,93106,United States
First Author AffilicationDepartment of Chemistry
Corresponding Author AffilicationDepartment of Chemistry
First Author's First AffilicationDepartment of Chemistry
Recommended Citation
GB/T 7714
Chen,Congcong,Morgan,Emily E.,Liu,Yang,等. “Breathing” organic cation to stabilize multiple structures in low-dimensional Ge-, Sn-, and Pb-based hybrid iodide perovskites[J]. Inorganic Chemistry Frontiers,2022.
APA
Chen,Congcong,Morgan,Emily E.,Liu,Yang,Chen,Jian,Seshadri,Ram,&Mao,Lingling.(2022).“Breathing” organic cation to stabilize multiple structures in low-dimensional Ge-, Sn-, and Pb-based hybrid iodide perovskites.Inorganic Chemistry Frontiers.
MLA
Chen,Congcong,et al."“Breathing” organic cation to stabilize multiple structures in low-dimensional Ge-, Sn-, and Pb-based hybrid iodide perovskites".Inorganic Chemistry Frontiers (2022).
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