• Rajarshi krishna Nath
• Indira Dey
• L. Hitesh Kumar Singha
• Arindam Roy

Abstract: Al-doped zinc oxide (ZnO:Al) Quantum Wells have been deposited on to the glass substrates under different doping concentrations (0-1.5at%) by spray pyrolysis technique. The structrual, optical & morphological properties of the quantum wells have been investigated and then examined for ethanol sensing. The structural and morphological studies done by XRD & TEM are in good agreement with each other with a minimum variation in size. The response of the quantum well have been studied for all the samples within the concentration range (100 -500)ppm of ethanol in air at various operating temperature (225-3500C). It is observed that incorporation of Al in ZnO enhances the response of the samples to ethanol. A maximum response of (~60%) is observed for 1 at% ZnO:Al quantum well at 300 0C to 500 ppm of ethanol in air. Further the response & recovery times are found to be decreased with an increase in doping concentration and also at higher operating temperatures.

Key words: ZnO:Al, quantum well, spray pyrolysis, ethanol, sensor.

"Al doped Zinc Oxide Quantum Well based Ethanol Sensor", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 9, page no.a125-a131, September-2026, Available :http://www.jetir.org/papers/JETIR2609014.pdf

"Al doped Zinc Oxide Quantum Well based Ethanol Sensor", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 9, page no. ppa125-a131, September-2026, Available at : http://www.jetir.org/papers/JETIR2609014.pdf