Exploring the Steric Hindrance of Alkylammonium Cations in the Structural Reconfiguration of Quasi-2D Perovskite Materials Using a High-throughput Experimental Platform

Jiyun Zhang; Jianchang Wu; Stefan LangnerBaolin ZhaoZhiqiang XieJens A. HauchHany A. AfifyAnastasia BarabashJunsheng LuoMykhailo SytnykWei MengKaicheng ZhangChao LiuAndres OsvetNing LiMarcus HalikWolfgang HeissYicheng ZhaoChristoph J. Brabec

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Exploring the Steric Hindrance of Alkylammonium Cations in the Structural Reconfiguration of Quasi-2D Perovskite Materials Using a High-throughput Experimental Platform

机译：Exploring the Steric Hindrance of Alkylammonium Cations in the Structural Reconfiguration of Quasi-2D Perovskite Materials Using a High-throughput Experimental Platform

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Reduced-dimensional (2D or quasi-2D) perovskites have recently attractedconsiderable interest due to their superior long-term stability. The nature ofthe intercalating cations plays a key role in determining the physicochemicalproperties and stability of the quasi-2D perovskites. Here, the thermal stabilityof a series of 2D Ruddlesden?Popper (RP) perovskites is studied using seventypes of intercalating cations with increasing linear carbon-chain length fromethylammonium (EA) to n-dodecylammonium (DA) through a high-throughputplatform. The results show that long-chain cations in quasi-2D perovskite filmslead to strong steric hindrance between adjacent perovskite domains, thus suppressingOstwald ripening during the thermal-aging process. For short-chaincations, increased-dimensional phase redistribution during the aging periodis observed, which can benefit a concomitant regeneration of the 3D/3D-likeperovskite phases. The impact of steric hindrance on structural reconfigurationand the subsequent phase redistribution in quasi-2D perovskites are systematicallycharacterized by UV–vis absorption spectra, photoluminescence spectra,and X-ray diffraction patterns. Due to the steric hindrance effect, an optimalchain length is found to maximize film stability by balancing the water/oxygenresistance and increased-dimensional phase redistribution. This study providesnew insight into the thermal stability of quasi-2D perovskites.

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《Advanced functional materials》 |2022年第43期|2207101.1-2207101.9|共9页
作者
Jiyun Zhang; Jianchang Wu; Stefan LangnerBaolin ZhaoZhiqiang XieJens A. HauchHany A. AfifyAnastasia BarabashJunsheng LuoMykhailo SytnykWei MengKaicheng ZhangChao LiuAndres OsvetNing LiMarcus HalikWolfgang HeissYicheng ZhaoChristoph J. Brabec;
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Friedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceMaterials for Electronics and Energy Technology (i-MEET)Martensstrasse 7, 91058 Erlangen, Germany University of Electronic Science and Technology of China;

Helmholtz-Institute Erlangen-Nürnberg (HI ERN)Immerwahrstra?e 2, 91058 Erlangen, Germany;

Friedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceMaterials for Electronics and Energy Technology (i-MEET)Martensstrasse 7, 91058 Erlangen, GermanyHelmholtz-Institute Erlangen-Nuernberg (HI ERN)Immerwahrstrass 2, 91058 Erlangen, Germany Friedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceMaterials for Electronics and Energy Technology (i-MEET)MartenssFriedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceOrganic Materials and Devices (OMD)Institute of Polymer MaterialsIZNF building, Martens Cauerstrasse 73, 91058 Erlangen, Germany Friedrich-Alexander-UniveFriedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceOrganic Materials and Devices (OMD)Institute of Polymer MaterialsIZNF building, Martens Cauerstrasse 73, 91058 Erlangen, GermanyFriedrich-Alexander-University Erlangen-NurembergFaculty of EngineeringDepartment of Material ScienceMaterials for Electronics and Energy Technology (i-MEET)Martensstrasse 7, 91058 Erlangen, Germany Department of Laser Sciences and InteractionsNational In;

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2D perovskite materials; high-throughput platforms; steric structure; structural reconfiguration; steric hindrance; stability performance;

Exploring the Steric Hindrance of Alkylammonium Cations in the Structural Reconfiguration of Quasi-2D Perovskite Materials Using a High-throughput Experimental Platform

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