DONG Han-peng, ZHANG Wei. Influence of humidity on sensitivity of semiconductor alcohol sensors and application of niobium oxide dopant[J]. 2008, (3): 49-51+57.
DONG Han-peng, ZHANG Wei. Influence of humidity on sensitivity of semiconductor alcohol sensors and application of niobium oxide dopant[J]. 2008, (3): 49-51+57. DOI: 10.13873/j.1000-97872008.03.035.
The influence of humidity on the sensitivity of stannic oxide based alcohol sensors is investigated.Humidity induced signal attenuation is observed when some trivalent metal ions or oxides
especially La2O3
are used as dopant.The rate of attenuation of the sensors to 3×10-4volume fraction of alcohol reaches 30 %
4
0 % at 90 %RH and 25 ℃.This attenuation is observed at In2O3 and Al2O3 dopant systems.Less attenuation can be found when Nb2O5 is used as dopant.1.5 %Nb2O5 accompany with 0.5 %La2O3 dopant is developed
which shows less humidity induced signal attenuation rate and excellent sensitivity and selectivity to alcohol.
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references
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