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Nanomaterials 2018, 8(5), 318;

High-Switching-Ratio Photodetectors Based on Perovskite CH3NH3PbI3 Nanowires

School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, China
School of Xingtai Polytechnic College, Xingtai 054035, China
Authors to whom correspondence should be addressed.
Received: 16 April 2018 / Revised: 1 May 2018 / Accepted: 2 May 2018 / Published: 10 May 2018
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Hybrid organic-inorganic perovskite materials have attracted extensive attention due to their impressive performance in photovoltaic devices. One-dimensional perovskite CH3NH3PbI3 nanomaterials, possessing unique structural features such as large surface-to-volume ratio, anisotropic geometry and quantum confinement, may have excellent optoelectronic properties, which could be utilized to fabricate high-performance photodetectors. However, in comparison to CH3NH3PbI3 thin films, reports on the fabrication of CH3NH3PbI3 nanowires for optoelectrical application are rather limited. Herein, a two-step spin-coating process has been utilized to fabricate pure-phase and single-crystalline CH3NH3PbI3 nanowires on a substrate without mesoporous TiO2 or Al2O3. The size and density of CH3NH3PbI3 nanowires can be easily controlled by changing the PbI2 precursor concentration. The as-prepared CH3NH3PbI3 nanowires are utilized to fabricate photodetectors, which exhibit a fairly high switching ratio of ~600, a responsivity of 55 mA/W, and a normalized detectivity of 0.5 × 1011 jones under 532 nm light illumination (40 mW/cm2) at a very low bias voltage of 0.1 V. The as-prepared perovskite CH3NH3PbI3 nanowires with excellent optoelectronic properties are regarded to be a potential candidate for high-performance photodetector application. View Full-Text
Keywords: perovskite; CH3NH3PbI3 nanowires; spincoating; photodetectors perovskite; CH3NH3PbI3 nanowires; spincoating; photodetectors

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, X.; Liu, C.; Ren, G.; Li, S.; Bi, C.; Hao, Q.; Liu, H. High-Switching-Ratio Photodetectors Based on Perovskite CH3NH3PbI3 Nanowires. Nanomaterials 2018, 8, 318.

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