TY - JOUR
T1 - Doped tungsten oxide microstructures for enhancing ultraviolet sensing based on ZnO/glass transparent acoustic wave technology
AU - Ong, Hui Ling
AU - Guo, Yihao
AU - Thummavichai, Kunyapat
AU - Zhou, Jian
AU - Zhang, Jikai
AU - Haworth, Luke
AU - Jiang, Yunhong
AU - Zhang, Meng
AU - Ghassemlooy, Zabih
AU - Wu, Qiang
AU - Fu, Yongqing
N1 - This work was financially supported by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant EP/P018998/1, Newton Mobility Grant (IE161019) through Royal Society, the National Natural Science Foundation of China (11504291,52075162, 12104320), Research Project in Fundamental and Application Fields of Guangdong Province (2020A1515110561), Shenzhen Science & Technology Project (RCBS20200714114918249), the Innovation Leading Program of New and High-tech Industry of Hunan Province (2020GK2015), the Natural Science Foundation of Hunan Province (2021JJ20018), and the Natural Science Foundation of Changsha (kq2007026).
PY - 2023/12/1
Y1 - 2023/12/1
N2 - Metal element (Nb, Er, and Gd) doped WOx powders were prepared via a one-step solvothermal method to enhance photocatalytic property of WOx, and they were used to enhance ultraviolet (UV) sensing performance of ZnO/glass surface acoustic wave (SAW) devices. Results showed that Gd-doped WOx has a better photocatalytic performance amongst the other doped WOx (Nb and Er), which can be explained using the different reductions of band gaps after doping. Gd-doped WOx coated on the ZnO/glass SAW device demonstrates the best performance in enhancement of UV sensitivity which is 14 times higher than the uncoated SAW device. The incorporation of dopants Gd into the WOx matrix leads to a multitude of effects that collectively enhance the UV sensing performance, including modified band gap, increased charge carrier generation, enhanced conductivity, efficient charge separation, and recombination suppression. Electrical properties and UV sensing mechanisms on ZnO/glass SAW devices based on Gd-doped WOx were studied, and the frequency shifts in these SAW devices are primarily due to ultraviolet-induced changes in conductivity and thermal effects.
AB - Metal element (Nb, Er, and Gd) doped WOx powders were prepared via a one-step solvothermal method to enhance photocatalytic property of WOx, and they were used to enhance ultraviolet (UV) sensing performance of ZnO/glass surface acoustic wave (SAW) devices. Results showed that Gd-doped WOx has a better photocatalytic performance amongst the other doped WOx (Nb and Er), which can be explained using the different reductions of band gaps after doping. Gd-doped WOx coated on the ZnO/glass SAW device demonstrates the best performance in enhancement of UV sensitivity which is 14 times higher than the uncoated SAW device. The incorporation of dopants Gd into the WOx matrix leads to a multitude of effects that collectively enhance the UV sensing performance, including modified band gap, increased charge carrier generation, enhanced conductivity, efficient charge separation, and recombination suppression. Electrical properties and UV sensing mechanisms on ZnO/glass SAW devices based on Gd-doped WOx were studied, and the frequency shifts in these SAW devices are primarily due to ultraviolet-induced changes in conductivity and thermal effects.
KW - Rare-earth metal
KW - Sensing
KW - Surface acoustic wave
KW - Tungsten oxide
KW - Ultraviolet
KW - ZnO
UR - https://www.scopus.com/pages/publications/85172905326
U2 - 10.1016/j.sna.2023.114705
DO - 10.1016/j.sna.2023.114705
M3 - Article
SN - 0924-4247
VL - 363
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
M1 - 114705
ER -