phototransistorn.
/ˌfəʊtə(ʊ)tranˈzɪstə/, /ˌfəʊtə(ʊ)trɑːnˈzɪstə/, /ˌfəʊtə(ʊ)tranˈsɪstə/, /ˌfəʊtə(ʊ)trɑːnˈsɪstə/, U.S. /ˈˌfoʊdoʊˌtrænˈzɪstər/ Electronics.
A junction transistor which generates and amplifies an electric current in response to incident light.
ΘΚΠ
the world > matter > physics > solid state physics > semiconductivity > transistor > [noun]
transistor1948
junction transistor1949
phototransistor1950
power transistor1957
1950 J. N. Shive in Bell Lab. Rec. 28 337/2 Experiments have resulted in the production of a new photoconductivity cell, called the ‘Phototransistor’.
1962 P. M. Williams in G. A. T. Burdett Automatic Control Handbk. ix. 52 Photo~transistors can be made which are sensitive to X-rays, ultra violet and infra red.
1970 New Scientist 24 Dec. 554/1 The new reading head is only a few centimetres across and contains a matrix of 144 bipolar photo~transistors on a silicon chip.
1991 Personal Computer World Feb. 135/3 As the wheels turn, light passes through the slots and the emissions are picked up by a phototransistor.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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