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Structural, optical, and electrical properties of phase-controlled cesium lead iodide nanowires.
- Source :
- Nano Research; Apr2017, Vol. 10 Issue 4, p1107-1114, 8p
- Publication Year :
- 2017
-
Abstract
- Cesium lead iodide (CsPbI), in its black perovskite phase, has a suitable bandgap and high quantum efficiency for photovoltaic applications. However, CsPbI tends to crystalize into a yellow non-perovskite phase, which has poor optoelectronic properties, at room temperature. Therefore, controlling the phase transition in CsPbI is critical for practical application of this material. Here we report a systematic study of the phase transition of one-dimensional CsPbI nanowires and their corresponding structural, optical, and electrical properties. We show the formation of perovskite black phase CsPbI nanowires from the non-perovskite yellow phase through rapid thermal quenching. Post-transformed black phase CsPbI nanowires exhibit increased photoluminescence emission intensity with a shrinking of the bandgap from 2.78 to 1.76 eV. The perovskite nanowires were photoconductive and showed a fast photoresponse and excellent stability at room temperature. These promising optical and electrical properties make the perovskite CsPbI3 nanowires attractive for a variety of nanoscale optoelectronic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 10
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 122340750
- Full Text :
- https://doi.org/10.1007/s12274-016-1415-0