About: http://webisa.webdatacommons.org/132838547

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, these kinds of solar cells have problems that the economic costs and energy costs in a manufacturing process are high, and also a highly toxic material such as gallium or arsenic is used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.de