High-Switching-Ratio Photodetectors Based on Perovskite CH3NH3PbI3 Nanowires
AbstractHybrid 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
- Supplementary File 1:
PDF-Document (PDF, 553 KB)
Share & Cite This Article
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.
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(5):318.Chicago/Turabian Style
Zhang, Xin; Liu, Caichi; Ren, Gang; Li, Shiyun; Bi, Chenghao; Hao, Qiuyan; Liu, Hui. 2018. "High-Switching-Ratio Photodetectors Based on Perovskite CH3NH3PbI3 Nanowires." Nanomaterials 8, no. 5: 318.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.