Assertion: semiconductor | /r/ObjectUse | used as photodiode
Facets:
Source sentences:
text: Prior to the invention of the bipolar transistor in 1947, semiconductors were used only as two-terminal devices, such as rectifiers and photodiodes.
text: Prior to the invention of the bipolar transistor in 1947, semiconductors were used only as two-terminal devices, such as rectifiers and photodiodes.