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1. (WO2017149195) A QUANTUM DOT PHOTODETECTOR APPARATUS AND ASSOCIATED METHODS

Pub. No.:    WO/2017/149195    International Application No.:    PCT/FI2017/050108
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 21 00:59:59 CET 2017
IPC: H01L 31/0352
G01J 1/16
H01L 27/146
H01L 31/113
Applicants: NOKIA TECHNOLOGIES OY
Inventors: KALLIOINEN, Sami
VOUTILAINEN, Martti
Title: A QUANTUM DOT PHOTODETECTOR APPARATUS AND ASSOCIATED METHODS
Abstract:
An apparatus comprising at least one pair of a first inner andsecond outer photodetector, each photodetector comprising a channel member, respective source and drain electrodes configured to enable a flow of electrical currentthrough the channel member between the source and drain electrodes, and a plurality of quantum dots configured to generate electron-hole pairs on exposure to incident electromagnetic radiation to produce a detectable change in the electrical current flowing through the channel member. The first inner and second outer photodetectorsare configured to generate electron-hole pairs which produce an increase and decrease in electrical current through the channel members. The first inner and the second outer photodetectorssharea common channel member, which ispartitioned by one or more of the respective source and drain electrodes respectively extending in two dimensions such that the first inner photodetector is defined within the second outer photodetector.