TY  - JOUR
AU  - Emelianov, Aleksei V.
AU  - Kireev, Dmitry
AU  - Offenhäusser, Andreas
AU  - Otero, Nerea
AU  - Romero, Pablo M.
AU  - Bobrinetskiy, Ivan I.
TI  - Thermoelectrically Driven Photocurrent Generation in Femtosecond Laser Patterned Graphene Junctions
JO  - ACS photonics
VL  - 5
IS  - 8
SN  - 2330-4022
CY  - Washington, DC
PB  - ACS
M1  - FZJ-2018-07165
SP  - 3107 - 3115
PY  - 2018
AB  - Single and few-layer graphene photodetectors have attracted much attention in the past few years. Pristine graphene shows a very weak response to visible light; hence, fabrication of complex graphene-based detectors is a challenging task. In this work, we utilize the ultrafast laser functionalization of single-layer CVD graphene for highly desirable maskless fabrication of micro- and nanoscale devices. We investigate the optoelectronic response of pristine and functionalized devices under femtosecond and continuous wave lasers irradiation. We demonstrate that the photocurrent generation in p–p+ junctions formed in single-layer graphene is related to the photothermoelectric effect. The photoresponsivity of our laser patterned single-layer graphene junctions is shown to be as high as 100 mA/W with noise equivalent power less than 6 kW/cm2. These results open a path to a low-cost maskless technology for fabrication of graphene-based optoelectronic devices with tunable properties for spectroscopy, signal processing, and other applications.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000442185900019
DO  - DOI:10.1021/acsphotonics.8b00350
UR  - https://juser.fz-juelich.de/record/858274
ER  -