Synthesis of Fe-Doped ZnO Nanorods by Rapid Mixing Hydrothermal Method and Its Application for High Performance UV Photodetector

Abstract

We have successfully synthesized Fe-doped ZnO nanorods by a new and simple method in which the adopted approach is by using ammonia as a continuous source ofOH-for hydrolysis instead of hexamethylenetetramine (HMT). The energy dispersive X-ray (EDX) spectra revealed that the Fe peaks were presented in the grown Fe-doped ZnO nanorods samples and the X-ray photoelectron spectroscopy (XPS) results suggested that Fe3+is incorporated into the ZnO lattice. Structural characterization indicated that the Fe-doped ZnO nanorods grow along thec-axis with a hexagonal wurtzite structure and have single crystalline nature without any secondary phases or clusters of FeO or Fe3O4observed in the samples. The Fe-doped ZnO nanorods showed room temperature (300 K) ferromagnetic magnetization versus field (M-H) hysteresis and the magnetization increases from 2.5 μemu to 9.1 μemu for Zn0.99Fe0.01O and Zn0.95Fe0.05O, respectively. Moreover, the fabricated Au/Fe-doped ZnO Schottky diode based UV photodetector achieved 2.33 A/W of responsivity and 5 s of time response. Compared to other Au/ZnO nanorods Schottky devices, the presented responsivity is an improvement by a factor of 3.9.

Multifunctional device based on ZnO:Fe nanostructured films with enhanced UV and ultra-fast ethanol vapour sensing

“…The small peaks corresponding to Fe-2p lines can be noticed on the overview spectra around 710 eV. A high resolution scan of this region is depicted as inset graph showing the doublet of Fe-2p lines (Fe-2p 1/2 and Fe-2p 3/2 lines with a spinorbit splitting at $ 13.5 eV) [59,60]. XPS spectra of O-1s and Zn-2p lines are shown in Fig.…”

Enhancing the Photoelectric Performance of Photodetectors Based on Metal Oxide Semiconductors by Charge‐Carrier Engineering

“…The deeper insight into the relationship of photoresponse properties with material structure and device configuration is required to construct high‐performance self‐powered PD . Moreover, the piezophototronic effect, thermophototronic effect, photogating effect, as well as the coupling between ferromagnetic electrodes and nanostructured materials are novel routes to improving the self‐powering performance of PDs.…”

“…The deeper insight into the relationship of photoresponse properties with material structure and device configuration is required to construct high-performance selfpowered PD. [44] Moreover, the piezophototronic effect, [140] thermophototronic effect, [141] photogating effect, [142] as well as the coupling between ferromagnetic electrodes and nanostructured materials [143] are novel routes to improving the self-powering performance of PDs. 4) New Concept Photodetectors: Remarkable features such as transparence, [144] flexibility, [145] stretchability, [146] printability, [147] and multifunctionality [148] are in great need for the construction of novel wearable, [149] visualized, [150] wireless, and real-time [151] PDs.…”

Fabrication of Ultraviolet Photodetectors Based on Fe-Doped ZnO Nanorod Structures

“…The inset of Figure 3 shows that the location of the (002) diffraction peak slightly shifts toward higher diffraction angles, which indicates the change in d-spacing. This result implies that the ionic radii value of Fe 3+ (0.068 nm) is smaller than that of Zn 2+ ion (0.074 nm), and Fe atoms may substitute Zn 2+ sites or incorporate interstitially in the ZnO structure [ 30 , 31 ].…”