prov:value
| - Specifically, for example, it is preferred to use a metal such as gold (Au), nickel (Ni), palladium (Pd) and platinum (Pt), a conductive oxide such as In???Sn???O, ZnO:Al (a mixture wherein Al is added to ZnO), In???Zn???O, SnO2:Sb (a mixture wherein Sb is added to SnO2), and a semiconductor such as ??-silicon, polysilicone, ??-silicon carbide and ??-carbon.
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