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Enhancing Optoelectronic Properties of Low-Dimensional Halide Perovskite via Ultrasonic-Assisted Template Refinement.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2017 Nov 15; Vol. 9 (45), pp. 39602-39609. Date of Electronic Publication: 2017 Nov 01. - Publication Year :
- 2017
-
Abstract
- Low-dimensional halide perovskite (HP) has triggered lots of research attention in recent years due to anisotropic optoelectronic/semiconducting properties and enhanced stability. High-quality low-dimensional HPs via controllable engineering are required to fulfill the encouraging promise for device applications. Here, we introduce, for the first time, postsynthetic ultrasonic-assisted refinement of two-dimensional homologous HPs (OA <subscript>2</subscript> PbBr <subscript>4</subscript> , OA is octadecylamine). The solution-prepared OA <subscript>2</subscript> PbBr <subscript>4</subscript> , either in the form of large-sized microcrystal or nanosheet, obtains significantly enhanced crystallinity after ultrasonic treatment. We further show that OA <subscript>2</subscript> PbBr <subscript>4</subscript> nanosheets can be used as a template to construct low-dimensional CsPbBr <subscript>3</subscript> with the size and morphology inherited. Importantly, we found the ultrasonic-treated OA <subscript>2</subscript> PbBr <subscript>4</subscript> crystals, compared with pristine ones, lead to enhanced optoelectronic properties for the resultant low-dimensional CsPbBr <subscript>3</subscript> , as demonstrated by improved photodetection performances, including prolonged charge-carrier lifetime, improved photostability, increased external quantum yield/responsivity, and faster response speed. We believe this work provides novel engineering of low-dimensional HPs beyond the reach of straightforward synthesis.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 9
- Issue :
- 45
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 29063759
- Full Text :
- https://doi.org/10.1021/acsami.7b12048