Photo detector

Patent metadata

Field	Value
Publication number	US-9614110-B2
Application number	US-201615072228-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	Apr 20, 2015
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

Disclosed is a photo detector. The photo detector includes: a conductive substrate; an insulating layer formed on the conductive substrate; a single-layer graphene formed at one part of an upper end of the insulating layer and formed in one layer; a multi-layer graphene formed at the other part of the upper end of the insulating layer and formed in multiple layers; a first electrode formed at an end of the single-layer graphene; and a second electrode formed at an end of the multi-layer graphene.

First claim

What is claimed is:

1. A photo detector, comprising:
a conductive substrate;
an insulating layer formed on the conductive substrate;
a graphene structure formed on the insulating layer, the graphene structure including
a single-layer graphene consisting of a single layer of graphene,
a multi-layer graphene consisting of multiple layers of graphene, the multi-layer graphene being formed in an area different in plan view from an area in which the single-layer is formed, and
a boundary surface in which the single-layer graphene contacts the multi-layer graphene;

a first electrode formed at one end of the graphene structure; and
a second electrode formed at an other end of the graphene structure.

2. The photo detector of claim 1 , wherein the graphene structure has an interdigitated structure in which the single-layer graphene and the multi-layer graphene interdigitate each other.

3. The photo detector of claim 2 , wherein each of the single-layer graphene and the multi-layer graphene is implemented in a form of quadrangular saw teeth.

4. The photo detector of claim 3 , wherein the single-layer graphene and the multi-layer graphene have a structure, in which the saw teeth portions formed based on a direction connecting the first electrode and the second electrode are sequentially and alternately and disposed.

5. The photo detector of claim 2 , wherein a photo current is increased by applying a voltage between the substrate and the first and second electrodes.

6. The photo detector of claim 1 , wherein in response to a radiation of a light to the boundary surface of the graphene structure, a photo current flows between the first electrode and the second electrode.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kim Jin Tae
• Choi Choon Gi
• Yu Young Jun
• Chung Kwang Hyo
• Choi Jin Sik
• Choi Hong Kyw

Classifications

• H01L31/101

  Electricity · mapped topic

• H01L31/028 Primary

  Electricity · mapped topic

• H01L31/03529

  Electricity · mapped topic

• H01L31/09

  Electricity · mapped topic

• H10F77/148

  Shapes of potential barriers · CPC title