Probing Photocurrent Response in 2D Materials Using Scanning Photocurrent Microscopy
POSTER
Abstract
Understanding the photoresponse of 2D materials and their heterostructures is important for applications in optoelectronic devices, including photovoltaics, photodetectors, etc. Scanning photocurrent microscopy is a useful photoresponsivity mapping technique for characterizing the optoelectronic properties of nanomaterials including carrier diffusion lengths, internal electric field distribution, band bending effects at heterojunctions, photothermal properties, and information about recombination mechanisms. Results contained are the exploration of 2D material heterojunctions of InSe/WSe2 and MoSe2/black phosphorous as well as the recently discovered PdSe2. This tool, operating as part of a user facility, can be used to investigate optoelectronic properties and applications of a wide range of nanomaterials, as is demonstrated in several use cases.
*This research was conducted at the Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility.
Presenters
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Alex Strasser
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Artie McFerrin Department of Chemical Engineering, Texas A&M University