P1.3.17 Mechanistic Model for UV light-enhanced NO2 Sensing utilizing Ordered Mesoporous In2O3

Thorsten Wagner, Michael Tiemann, Claus-Dieter Kohl, Sara Morandi, Cesare Malag├╣, Nicola Donato, Mariangela Latino & Giovanni Neri
Results on light-enhanced NO2 sensing utilizing ordered mesoporous In2O3 are presented and interpreted by means of a new sensing model for ordered mesoporous indium oxide (In2O3). This model aims to explain the drop in electronic resistance of n-type semiconducting In2O3 under UV light exposure as well as the light-enhanced sensing properties to oxidizing gases. Compared to the conventional double Schottky model the dominating factor for the resistance change is a change of oxygen vacancy donor...