AP1.2 - A novel flexible room-temperature NO2 sensor based on WO3 integrated with white LED lamps
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- Applications 1 - Sensing NO2
- X. Geng, C. Zhang - College of Mechanical Engineering, Yangzhou University, Yangzhou (China), H. Charlier, M. Debliquy - Service de Science des Matériaux, Faculté Polytechnique, Université de Mons, Mons (Belgium), D. Lahem, M. Olivier - Department of Materials Science, Materia Nova ASBL Mons, Mons (Belgium)
- 159 - 160
Miniaturized, portable and flexible WO3 sensors illuminated by commercially available white LED lamps for ppb-level NO2 detection at room temperature were successfully fabricated. The gold electrodes and LED lamps were integrated on the transparent substrates, in which the electrodes were deposited on the front side and the lamps were fixed at the back side. The hierarchical hollow WO3 microspheres were solution-processed, and screen-printed on the substrate. The prepared sensor exhibits excellent response to ppb-level NO2 in the range of 100-700 ppb, the sensitivity is as high as 13.3 even for 100 ppb NO2. The repeatability tests show that the sensor has a good repeatable performance. In addition, in contrast with the traditional room-temperature semiconductor gas sensors which are strongly influenced by humidity, the prepared sensor is less sensitive to humidity.