TCO’s are widely used in the display and in thin film solar cell industries among others. We are now exploring the possibility of using TCO coated glass in microwave oven doors. This would have the advantage of better transparency than present day door designs.

Having that in mind we are studying the microwave response of TCO coated glasses through transmission and reflectivity measurements and correlating the behaviour to the properties of the TCO film nature and electrical DC properties.

In this work we report the results of our microwave transmission/reflectivity studies. We have compared the response of a typical microwave oven door with that of glass coated with commercial ITO and with in-house deposited FTO with varying DC conductivities. We have seen that the TCO coated glass analysed compares quite favourably with the response of an actual oven door although some improvements are still required. We have not seen significant differences between the responses of ITO and FTO coated glasses. Nevertheless we believe FTO has advantages over ITO because of its superior thermal stability and also because it does use In, which is an expensive element.

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