Issue 13, 2024

Demonstration of a low power and high-speed graphene/silicon heterojunction near-infrared photodetector

Abstract

The structure and process of the graphene/Si heterojunction near-infrared photodetector were optimized to enhance the operating speed limit. The introduction of a well-designed structure improved the rise time from 12.6 μs to 115 ns, albeit at the expense of the responsivity, which decreased from 1.25 A W−1 to 0.56 A W−1. Similarly, the falling time was improved from 38 μs to 288 ns with a sacrifice in responsivity from 1.25 A W−1 to 0.29 A W−1, achieved through the introduction of Ge-induced defect-recombination centers within the well. Through a judicious well design and the introduction of recombination defect centers, the minimum pulse width could be improved from 50.6 μs to 435 ns, facilitating 2 MHz operation. This represents more than 100 times increase compared to previously reported graphene and graphene/Si hybrid photodetectors.

Graphical abstract: Demonstration of a low power and high-speed graphene/silicon heterojunction near-infrared photodetector

Supplementary files

Article information

Article type
Paper
Submitted
04 apr 2024
Accepted
18 may 2024
First published
20 may 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2024,6, 3391-3398

Demonstration of a low power and high-speed graphene/silicon heterojunction near-infrared photodetector

M. G. Kwon, C. Kim, S. Kim, T. J. Yoo, Y. Lee, H. J. Hwang, S. Lee and B. H. Lee, Nanoscale Adv., 2024, 6, 3391 DOI: 10.1039/D4NA00286E

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements