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.

公开(公告)号：US10283655B2

公开(公告)日：2019-05-07

申请号：US15549252

申请日：2016-01-28

Applicant: EMBERION OY

Inventor： Chris Bower ,  Elisabetta Spigone

IPC: H01L31/0352 ,  C09D11/52 ,  B82Y15/00 ,  C09D11/322 ,  B41J2/21 ,  H01L51/00 ,  B82Y20/00

Abstract: A method comprising: depositing a quantum dot solution onto a supporting substrate in a drop-wise manner to form one or more discrete droplets on a surface of the substrate, the quantum dot solution and discrete droplets comprising a plurality of quantum dots having primary ligands attached thereto to stabilize the quantum dots in solution; and depositing a ligand-exchange solution onto the one or more discrete droplets in a drop-wise manner to cause replacement of the primary ligands attached to the plurality of quantum dots with shorter-chain secondary ligands, replacement of the primary ligands with the secondary ligands allowing the plurality of quantum dots within each discrete droplet to become sufficiently close packed to facilitate charge transfer there between.