Effect of the surface oxide layer on the stability of black phosphorus
Author(s)
Nan, H
Wang, X
Jiang, J
(Ken) Ostrikov, K
Ni, Z
Gu, X
Xiao, S
Griffith University Author(s)
Year published
2021
Metadata
Show full item recordAbstract
It has been a long-standing challenge to produce air-stable few-layer black phosphorus (BP) because BP degrade rapidly in ambient atmosphere. Here we demonstrate that the pristine BP with ten layers or more possesses a strong stability and can be stored in air for two weeks. The physical mechanism can be ascribed to the native phosphorus oxide formed on the surface, which act as a stable and protective capping layer and prevent the underlying layer from further oxidation. The pristine 10-layer BP FET device can maintain a high mobility value of around 220 cm2 V-1s−1 in air for 2 weeks. By contrast, the plasma-induced phosphorus ...
View more >It has been a long-standing challenge to produce air-stable few-layer black phosphorus (BP) because BP degrade rapidly in ambient atmosphere. Here we demonstrate that the pristine BP with ten layers or more possesses a strong stability and can be stored in air for two weeks. The physical mechanism can be ascribed to the native phosphorus oxide formed on the surface, which act as a stable and protective capping layer and prevent the underlying layer from further oxidation. The pristine 10-layer BP FET device can maintain a high mobility value of around 220 cm2 V-1s−1 in air for 2 weeks. By contrast, the plasma-induced phosphorus oxide is not dense or robust enough to protect the underlying sample from oxidation. These results suggest that the density of the oxide layer on the surface plays a vital role in the stability of BP flakes. This work offers new perspectives for probing the stability of BP based electronic and optoelectronic devices.
View less >
View more >It has been a long-standing challenge to produce air-stable few-layer black phosphorus (BP) because BP degrade rapidly in ambient atmosphere. Here we demonstrate that the pristine BP with ten layers or more possesses a strong stability and can be stored in air for two weeks. The physical mechanism can be ascribed to the native phosphorus oxide formed on the surface, which act as a stable and protective capping layer and prevent the underlying layer from further oxidation. The pristine 10-layer BP FET device can maintain a high mobility value of around 220 cm2 V-1s−1 in air for 2 weeks. By contrast, the plasma-induced phosphorus oxide is not dense or robust enough to protect the underlying sample from oxidation. These results suggest that the density of the oxide layer on the surface plays a vital role in the stability of BP flakes. This work offers new perspectives for probing the stability of BP based electronic and optoelectronic devices.
View less >
Journal Title
Applied Surface Science
Volume
537
Subject
Mechanical engineering