Rectifying effect in a MoS2 monolayer crossed with an electro-spun PEDOT-PSS nano-ribbon

• Published in: SN applied sciences Vol. 1; no. 6; p. 574
• Main Authors: Figueroa, Kelotchi S., Pérez, Jose L., Matar, Ahmad, Ramos, Idalia, Pinto, Nicholas J., Zhao, Meng-Qiang, Johnson, A. T. Charlie
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-06-2019; Springer Nature B.V
• Subjects: 5. Physics (general); Applied and Technical Physics; Chemical vapor deposition; Chemistry/Food Science; Conduction bands; Crystals; Data analysis; Diodes; Earth Sciences; Electric potential; Electrodes; Emission analysis; Engineering; Environment; Fabrication; Graphene; Materials Science; Molybdenum disulfide; Monolayers; Polymers; Potential barriers; Power consumption; Research Article; Thermionic emission; Transistors; Voltage; MoS; PEDOT-PSS; Diode; Nano-ribbon
• ISSN: 2523-3963; 2523-3971
• DOI: 10.1007/s42452-019-0595-0

A chemical vapor-deposited monolayer MoS
2
crystal was crossed with an electro-spun PEDOT-PSS nano-ribbon under ambient conditions. The current–voltage (
I
–
V
) curve measured across the hetero-junction was nonlinear and asymmetric, similar to a diode. Under thermal equilibrium, electrons flowed from the MoS
2
conduction band into the PEDOT-PSS LUMO level. This occurred via band bending that established a constant Fermi level across the interface. Consequently, a potential barrier was formed that restricted the current. Under normal operation in air, the diode turn-on voltage was 0.1 V and the rectification ratio at ± 1 V was 20. The thermionic emission Schottky junction model was employed for data analysis. The ideality factor was 1.9, and height of the barrier was 0.18 eV. The easy fabrication, low turn-on voltage and high rectification ratio could make this diode useful in cheap, low-power-consumption signal rectifiers.