首页>
外国专利>
Method of manufacturing chalcopyrite thin film solar cell comprising applying zinc sulfide buffer layer to chalcopyrite absorption layer formed on substrate by chemical bath deposition
Method of manufacturing chalcopyrite thin film solar cell comprising applying zinc sulfide buffer layer to chalcopyrite absorption layer formed on substrate by chemical bath deposition
Chemical bath deposition (CBD) has proved top be the most favorable method for application of a buffer layer to semiconductor substrates, for example, chalcopyrite thin-film solar cells and whereby previously cadmium sulfide (CdS) was deposited and as cadmium is a highly toxic heavy metal and alternatives have been required. According to the invention, the semiconductor substrate is dipped in a solution for approximately 10 minutes and produced by the dissolution of zinc sulfate (0.05-0.5 mol/l) and thiourea (0.2 to 1.5 mol/l) in distilled water at a temperature being held essentially constant throughout said period. For the first time and the ZnS layer permits comparable or higher efficiencies than conventionally only achieved with toxic cadmium compounds. The method is hence much more environmentally-friendly with the same result.
展开▼
