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| AIST has developed a thin film technology that can reduce the consumption of raw selenium below one-tenth of the conventional standard when manufacturing non-silicon-based CIGS thin-film solar cells. The technology uses radio-frequency-cracked selenium radicals instead of conventional vaporized selenium. With this technology, the high-reactivity of radical selenium can be utilized, thus reducing the consumption of raw Se to one-tenth. The technology enhances the conversion efficiency of a solar cell without using an expensive metal such as platinum, palladium, or iridium, and results in cells of reproducible quality from run to run. Additionally, the technology uses a black metal electrode and a light-absorbing layer containing ZnO (zinc oxide). This result brings about a great advancement for mass production of high-performance CIGS modules.semiconductor film CIGS substrate conventionally employed single-crystal GaAs glass soda lime electrode molybdenum surface |
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