Materials with both high transparency and high electriTa conductance have recently attracted growing technological interest . Applica- tions of such materials include coatings for windows with ability of deicing and demisting, coatings for electromagnetic shielding and antistatic coatings. Today, their application has been extended to- ward optoelectronic devices. They are being used for the fabrication of a variety of devices such as photovoltaic devices, display devices and light control devices which include electrochromic devices. In the above devices, transparent electronic conductors are almost always used as electrodes, where at least one electrode is required to feed current, while at the same time it allows incident light into the device or emissive light from the device. In other usages, transparent electronic conductors play an active part, such as in Schottky junc- tions in photovoltaic devices.
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