@article{Lai2017, 
author = {Minliang Lai and Qiao Kong and Connor G. Bischak and Yi Yu and Letian Dou and Samuel W. Eaton and Naomi S. Ginsberg and Peidong Yang},
title = {Structural, optical, and electrical properties of phasecontrolled cesium lead iodide nanowires},
year = {2017},
journal = {Nano Research},
volume = {10},
number = {4},
pages = {1107-1114},
keywords = {stability, phase transition, CsPbI3, inorganic halide perovskite},
url = {https://www.sciopen.com/article/10.1007/s12274-016-1415-0},
doi = {10.1007/s12274-016-1415-0},
abstract = {Cesium lead iodide (CsPbI3), in its black perovskite phase, has a suitable bandgap and high quantum efficiency for photovoltaic applications. However, CsPbI3 tends to crystalize into a yellow non-perovskite phase, which has poor optoelectronic properties, at room temperature. Therefore, controlling the phase transition in CsPbI3 is critical for practical application of this material. Here we report a systematic study of the phase transition of one-dimensional CsPbI3 nanowires and their corresponding structural, optical, and electrical properties. We show the formation of perovskite black phase CsPbI3 nanowires from the non-perovskite yellow phase through rapid thermal quenching. Post-transformed black phase CsPbI3 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.}
}