Structural, Photophysical, and Transport Properties of Porous MAPbBr3 Single Nanowire and Nanodevice for Electrochemical Sensing

Chun Yu Li, Muthaiah Shellaiah, Kien Wen Sun*

*此作品的通信作者

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

In this paper, we report synthesis of porous methylammonium lead tribromide (MAPbBr3) nanowires via self-template-directed method with dimensions of 13 ± 3 μm in length and 700 ± 100 nm in width. The perovskite single nanowires with correct compositions are demonstrated uniform in crystallinity and high in porosity by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The current-voltage (I-V) characteristics of a single nanowire display a linear behavior (Ohmic contact) from 300 K to 83 K with an average conductivity of 57.82 ± 4.8 S cm−1, a hole concentration of 5.98 × 1018 cm−3, and hole mobility of 60.33 cm2V−1S−1 at 300 K. The single porous nanowire not only displays resistivity of approximately five orders of magnitude lower than those of previous reported values but is also stable and insensitive to the environment’s effects. Moreover, conductivity of porous nanowires can be modulated via the doping or substituting mechanisms when encountering heavy metal ions. The single nanowire device is applied as an electrochemical sensor in detecting four metal ions (Cu2+, Co2+, Hg2+, and Fe3+). The wide dynamic range in electrical conductivity of this porous single nanowire makes it a potential candidate for metal ion sensing with great sensitivity.

原文English
文章編號077505
期刊Journal of the Electrochemical Society
170
發行號7
DOIs
出版狀態Published - 2023

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