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Localized Lattice Expansion of FAPbBr3 to Design a 3D Hybrid Perovskite for Sensitive Near‐Infrared Photodetection.
- Source :
-
Angewandte Chemie International Edition . 11/21/2022, Vol. 61 Issue 47, p1-6. 6p. - Publication Year :
- 2022
-
Abstract
- A mixed‐cation 3D lead bromide hybrid perovskite (NMDAP)2FAPb4Br13 (1, NMDAP2+ = N‐methyl‐1,3‐diaminopropanium, FA+ = formamidinium) is tailored by incorporating the large NMDAP2+ cation with the small FA+ ion into 3D FAPbBr3. Structurally, the small FA+ ions occupy the prototypical cavities formed by distorted corner‐sharing PbBr6 octahedra as in FAPbBr3, while the bulky NMDAP2+ ions are confined to the expanded lattice which is defined by a new structural motif composed of eight corner‐sharing PbBr6 octahedra and four edge‐sharing octahedra. This localized lattice expansion from FAPbBr3 creates a new branch of the intriguing 3D hybrid perovskite family, breaking the limits of the conventional Goldschmidt tolerance factor rule. Moreover, a high two‐photon absorption (2AP) coefficient of 60.8 cm MW−1 was demonstrated to near‐infrared (NIR) 800 nm illumination, enabling sensitive NIR photoresponses with large on/off ratio (≈104) as well as favorable stability. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PEROVSKITE
*LEAD
*OCTAHEDRA
*IONS
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 61
- Issue :
- 47
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 160199997
- Full Text :
- https://doi.org/10.1002/anie.202213294