Ruddlesden-Popper Hybrid Lead Bromide Perovskite Nanosheets of Phase Pure n=2: Stabilized Colloids Stored in the Solid State

被引:10
作者
Cevallos-Toledo, Rita B. [1 ]
Rosa-Pardo, Ignacio [1 ]
Arenal, Raul [2 ,3 ,4 ]
Oestreicher, Victor [1 ]
Fickert, Michael [5 ,6 ,7 ]
Abellan, Gonzalo [1 ]
Galian, Raquel E. [1 ]
Perez-Prieto, Julia [1 ]
机构
[1] Univ Valencia, Inst Mol Sci, C Catedratico Jose Beltran 2, Paterna, Spain
[2] Univ Zaragoza, Lab Microscopias Avanzadas LMA, Mariano Esquillor S-N, Zaragoza 50018, Spain
[3] Univ Zaragoza, Inst Nanociencia & Mat Aragon INMA, CSIC, Calle Pedro Cerbuna 12, Zaragoza 50009, Spain
[4] ARAID Fdn, Zaragoza 50018, Spain
[5] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Chem & Pharm, Chair Organ Chem 2, Nikolaus Fiebiger Str 10, D-90762 Erlangen, Germany
[6] Friedrich Alexander Univ Erlangen Nurnberg FAU, Joint Inst Adv Mat & Proc ZMP, Nikolaus Fiebiger Str 10, D-90762 Erlangen, Germany
[7] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dr Mack Str 81, D-90762 Furth, Germany
关键词
colloids; film; lead halide perovskites; nanodots; nanosheets; HALIDE; LUMINESCENT; NANOPLATELETS;
D O I
10.1002/anie.202113451
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ruddlesden-Popper lead halide perovskite (RP-LHP) nano-nanostructures can be regarded as self-assembled quantum wells or superlattices of 3D perovskites with an intrinsic quantum well thickness of a single or a few (n=2-4) lead halide layers; the quantum wells are separated by organic layers. They can be scaled down to a single quantum well dimension. Here, the preparation of highly (photo)chemical and colloidal stable hybrid LHP nanosheets (NSs) of ca. 7.4 mu m lateral size and 2.5 nm quantum well height (thereby presenting a deep blue emission at ca. 440 nm), is reported for the first time. The NSs are close-lying and they even interconnect when deposited on a substrate. Their synthesis is based on the use of the p-toluenesulfonic acid/dodecylamine (pTS/DDA) ligand pair and their (photo)chemical stability and photoluminescence is enhanced by adding EuBr2 nanodots (EuNDs). Strikingly, they can be preserved as a solid and stored for at least one year. The blue emissive colloid can be recovered from the solid as needed by simply dispersing the powder in toluene and then using it to prepare solid films, making them very promising candidates for manufacturing devices.
引用
收藏
页码:27312 / 27317
页数:6
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