Post-annealing effect on optical absorbance of hydrothermally grown zinc oxide nanorods

Recent Advances of ZnO Based Nanowires and Nanorods Devices

“…Figure 11. UV-vis absorbance spectra of ZnO nanorods [61] The optical absorbance of the ZnO nanorods was investigated and reported by Mohar et al [61]. The ZnO thin film were deposited on indium tin oxide layers using ultrasonic spray pyrolysis method and then grown by hydrothermal method [61].…”

“…UV-vis absorbance spectra of ZnO nanorods [61] The optical absorbance of the ZnO nanorods was investigated and reported by Mohar et al [61]. The ZnO thin film were deposited on indium tin oxide layers using ultrasonic spray pyrolysis method and then grown by hydrothermal method [61]. In order to improve the optical absorbance, the ZnO nanorods were then postannealed for one hour at three different of temperatures, namely 250, 400, and 500°C [61].…”

“…The ZnO thin film were deposited on indium tin oxide layers using ultrasonic spray pyrolysis method and then grown by hydrothermal method [61]. In order to improve the optical absorbance, the ZnO nanorods were then postannealed for one hour at three different of temperatures, namely 250, 400, and 500°C [61]. The XRD spectra and FESEM images showed that the ZnO nanorods have the hexagonal wurtzite crystal structure and the increasing of post annealing temperature resulted in the increasing of crystallite size from 38.2 nm to 48.4 nm [61].…”

“…In order to improve the optical absorbance, the ZnO nanorods were then postannealed for one hour at three different of temperatures, namely 250, 400, and 500°C [61]. The XRD spectra and FESEM images showed that the ZnO nanorods have the hexagonal wurtzite crystal structure and the increasing of post annealing temperature resulted in the increasing of crystallite size from 38.2 nm to 48.4 nm [61]. The UV-vis spectra showed that all samples of ZnO nanorods exhibited the identical sharp absorption edge at 390 nm indicating that all samples have the same bandgap [61].…”

“…The XRD spectra and FESEM images showed that the ZnO nanorods have the hexagonal wurtzite crystal structure and the increasing of post annealing temperature resulted in the increasing of crystallite size from 38.2 nm to 48.4 nm [61]. The UV-vis spectra showed that all samples of ZnO nanorods exhibited the identical sharp absorption edge at 390 nm indicating that all samples have the same bandgap [61]. The post-annealing process seemed to decreased the optical absorbance in the region of 300-550 nm and increase the optical absorbance in the region of 550-700 nm [61].…”