Electric-double-layer p-i-n junctions in WSe2.

Abstract:

:While p-n homojunctions in two-dimensional transition metal dichalcogenide materials have been widely reported, few show an ideality factor that is constant over more than a decade in current. In this paper, electric double layer p-i-n junctions in WSe2 are shown with substantially constant ideality factors (2-3) over more than 3 orders of magnitude in current. These lateral junctions use the solid polymer, polyethylene oxide: cesium perchlorate (PEO:CsClO4), to induce degenerate electron and hole carrier densities at the device contacts to form the junction. These high carrier densities aid in reducing the contact resistance and enable the exponential current dependence on voltage to be measured at higher currents than prior reports. Transport measurements of these WSe2 p-i-n homojunctions in combination with COMSOL multiphysics simulations are used to quantify the ion distributions, the semiconductor charge distributions, and the simulated band diagram of these junctions, to allow applications to be more clearly considered.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Fathipour S,Paletti P,Fullerton-Shirey SK,Seabaugh AC

doi

10.1038/s41598-020-69523-9

subject

Has Abstract

pub_date

2020-07-30 00:00:00

pages

12890

issue

1

issn

2045-2322

pii

10.1038/s41598-020-69523-9

journal_volume

10

pub_type

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