Graphene-Si Schottky IR Detector
Artikel i vetenskaplig tidskrift, 2013

This paper reports on photodetection properties of graphene-Si schottky junction by measuring current-voltage characteristics under 1.55µm excitation laser. The measurements have been done on a junction fabricated by depositing mechanically exfoliated natural graphite on top of the pre-patterned silicon substrate. The electrical Schottky barrier height is estimated to be (0.44-0.47) eV with a minimum responsivity of 2.8mA/W corresponding to an internal quantum efficiency of 10% which is almost an order of magnitude larger than regular Schottky junctions. A possible explanation for the large quantum efficiency related to the 2-D nature of graphene is discussed. Large quantum efficiency, room temperature IR detection, ease of fabrication along with compatibility with Si devices can open a doorway for novel graphene-based photodetectors.

Si

Schottky diode

Detector

Graphene

Författare

Mina Amirmazlaghani

K. N. Toosi University of Technology

Farshid Raissi

K. N. Toosi University of Technology

Omid Habibpour

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Josip Vukusic

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Jan Stake

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

IEEE Journal of Quantum Electronics

0018-9197 (ISSN)

Vol. 49 7 589-594

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Infrastruktur

Nanotekniklaboratoriet

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/JQE.2013.2261472

Mer information

Skapat

2017-10-08