公开(公告)号：US10727361B2

公开(公告)日：2020-07-28

申请号：US16096954

申请日：2017-04-25

Applicant: EMBERION OY

Inventor： Michael Robert Astley ,  Alan Colli

IPC: H01L31/112 ,  H01L31/0352 ,  H01L31/02 ,  G01J1/44 ,  H01L31/028 ,  H01L31/032 ,  H01L31/113

Abstract: An apparatus configured to alternate the application of first and second gate voltages to a gate electrode of a photodetector. A first change in electrical current is relative to a predetermined measurement of electrical current taken at the first gate voltage in the absence of incident electromagnetic radiation, and a second change in electrical current is relative to a predetermined measurement of electrical current taken at the second gate voltage in the absence of the incident electromagnetic radiation. The photodetector comprises a channel, and source and drain electrodes configured to enable flow of electrical current through the channel. Quantum dots are configured to generate charge carriers on exposure to the incident electromagnetic radiation. The gate electrode is configured to generate an electric field upon the application of a gate voltage thereto, and process the signal to at least partially remove any changes in electrical current which are attributed to noise.

公开(公告)号：US10483423B2

公开(公告)日：2019-11-19

申请号：US16165248

申请日：2018-10-19

Applicant: EMBERION OY

Inventor： Richard White ,  Alexander Bessonov ,  Piers Andrew ,  Mark Allen ,  Elisabetta Spigone ,  Michael Robert Astley

IPC: H01L31/112 ,  H01L31/0352 ,  H01L31/113 ,  H01L31/18

Abstract: An apparatus comprises a layer of channel material, source and drain electrodes configured to enable a flow of electrical current through the channel material, and a layer of quantum dot material configured to generate electron-hole pairs on exposure to electromagnetic radiation to produce a detectable change in the electrical current indicative of one or more of the presence and magnitude of the electromagnetic radiation. The layer of quantum dot material is positioned between the channel material and a layer of conductive material. The layers of channel and conductive material have work functions such that respective built-in electric fields are created at the interfaces between the layer of quantum dot material and the channel and conductive material. The electric field at each interface acts in the same direction to promote separation of the electrons and holes of the electron-hole pairs to facilitate production of the detectable change in electrical current.