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Realizing Long-Term Stability and Thickness Control of Black Phosphorus by Ambient Thermal Treatment
- Realizing Long-Term Stability and Thickness Control of Black Phosphorus by Ambient Thermal Treatment
- Jeong, Min-Hye; Kwak, Do-Hyun; Ra, Hyun-Soo; Lee, A-Young; Lee, Jong-Soo
- DGIST Authors
- Lee, Jong-Soo
- Issue Date
- ACS Applied Materials and Interfaces, 10(22), 19069-19075
- Article Type
- black phosphorus; field-effect transistor; thermal etching thickness control; air stability; FIELD-EFFECT TRANSISTORS; TRANSPORT-PROPERTIES; MOS2; AIR; GRAPHENE; PHOTODETECTORS; SEMICONDUCTOR; DEGRADATION; PASSIVATION; ELECTRONICS
- Few-layer black phosphorus (BP) has shown great potential for next-generation electronics with tunable band gap and high carrier mobility. For the electronic applications, the thickness modulation of a BP flake is essential due to its thickness-dependent electronic properties. However, controlling the precise thickness of few-layer BP is a challenge for the high-performance device applications. In this study, we demonstrate that thermal treatment under ambient condition precisely controls the thickness of BP flake. The thermal etching method utilizes the chemical reactivity of BP surface with oxygen and water molecules by the repeated formation and evaporation of phosphoric acid during thermal annealing. Field-effect transistor of the thickness-modulated BP sheet by thermal etching method shows a high hole mobility of ∼576 cm2 V-1 s-1 and a high on-off ratio of ∼105. The stability of the BP devices remained for 1 month under ambient condition without an additional protecting layer, resulting from the preservation of active BP layers below native surface phosphorus oxide. © 2018 American Chemical Society.
- American Chemical Society
- Related Researcher
MNEDL(Multifunctional Nanomaterials & Energy Devices Lab)
Design of new type of multifunctional nanoparticles for energy-related devices; 다기능성 나노재료; 무기물 태양전지; 열전소자
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- Department of Energy Science and EngineeringMNEDL(Multifunctional Nanomaterials & Energy Devices Lab)1. Journal Articles
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