Transparent thin film heaters based on silver nanowire networks

Ergün, Orçun
Transparent thin film heaters are used in various de-fogging and de-icing applications because of their ability to convert electrical energy to thermal energy while allowing to transmit solar light through a surface. Indium tin oxide (ITO) is the conventional transparent conducting material used in transparent thin film heaters. However, due to scarcity of indium and its increasing prices worldwide, coupled with the inflexibility of ITO, alternative materials are being investigated. Silver nanowire networks have a great potential to be used as transparent thermal thin film heaters because bulk silver has the highest electrical conductivity among other metals, which result in low sheet resistances. Moreover, silver nanowire thin film networks demonstrate high optical transparency with low sheet resistance. Diameter of silver nanowires are in the order of few tens of nanometers, which confines electrons to travel through one dimension that result in high thermal performance due to Joule heating. In addition, silver nanowire based transparent thin film heaters can be made flexible on polymeric substrates. In this thesis, silver nanowire based transparent thin film heaters were fabricated on quartz, soda lime silicate glass, polyethylene terephthalate (PET) substrates. Nanowire networks were deposited through simple spray coating method. Thermal performance as well as optoelectronic characteristics of the networks were determined. It is concluded that silver nanowire based transparent thin film heaters demonstrate high thermal performance coupled with high optical transmittance.


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Citation Formats
O. Ergün, “Transparent thin film heaters based on silver nanowire networks,” M.S. - Master of Science, Middle East Technical University, 2015.