| Autor: |
Jadhav, Sandhya Anil, Awale, M. B., Lokhande, S. D., Umadevi, G., Raskar, N. D., Vasundhara, M., Dole, B. N., Mote, Vishwanath D. |
| Zdroj: |
Emergent Materials; 20240101, Issue: Preprints p1-14, 14p |
| Abstrakt: |
Mn-doped ZnO thin films were successfully developed via chemical spray pyrolysis technique and characterized using Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDAX), X-ray diffraction (XRD), UV–Vis Spectroscopy. An erected nanoplates-like morphology of Mn-doped ZnO films was observed through FESEM images. XRD results clearly indicated hexagonal (wurtzite) crystal structures of the undoped and Mn-doped ZnO films. Lattice parameters and volume of unit cell values were found to increase with the increase of Mn doping concentration. The optical band gap decreased from 3.28 eV to 3.26, on increase in Mn2+concentration. The ammonia gas sensing properties of the sensors based on undoped and Mn-doped ZnO films with low detection limit (15 ppm) at room temperature were investigated. The ammonia responses increased with increasing Mn doping concentration. The maximum response of 65%, 70% and 90% was acquired for ZnO, 2% and 4% Mn doped ZnO films at room temperature respectively. The ammonia sensor based on 4% Mn-doped ZnO nanostructures exhibited excellent sensing performance of ammonia concentration (15 ppm). The response and recovery times of 4% Mn-doped ZnO sensor towards 15 ppm NH3are 13 s and 7 s respectively. Gas sensing results bring promise to low operating temperature, low-cost NH3sensor based on Mn-doped ZnO, which could possibly used as real-time monitoring. |
| Databáze: |
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