Assertion: silicon's electron | /r/CapableOf | move across the junction
Facets:
value: to flow in an external circuit
type: PURPOSE
Source sentences:
text: If p-silicon and n-silicon wafers are joined, in a manner called the p–n junction, and placed in sunlight, the absorbed energy causes electrons to move across the junction and an electric current to flow in an external circuit connecting the two wafers.