Nanoscale probing of surface potential landscape at MoS2/BP van der Waals p–n heterojunction
| Autor: | Mamta Raturi, Arneet Kaur, Himanshu Tyagi, Monika Bhakar, Jyoti Saini, Manpreet Kaur, Abir D Sarkar, Kiran S Hazra |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Nanotechnology. 34:095702 |
| ISSN: | 1361-6528 0957-4484 |
| Popis: | 2D van der Waals heterostructure paves a path towards next generation semiconductor junctions for nanoelectronics devices in the post silicon era. Probing the band alignment at a real condition of such 2D contacts and experimental determination of its junction parameters is necessary to comprehend the charge diffusion and transport through such 2D nano-junctions. Here, we demonstrate the formation of the p–n junction at the MoS2/Black phosphorene (BP) interface and conduct a nanoscale investigation to experimentally measure the band alignment at real conditions by means of measuring the spatial distribution of built-in potential, built-in electric field, and depletion width using the Kelvin probe force microscopy (KPFM) technique. We show that optimization of lift scan height is critical for defining the depletion region of MoS2/BP with nanoscale precision using the KPFM technique. The variations in the built-in potential and built-in electric field with varying thicknesses of MoS2 are revealed and calibrated. |
| Databáze: | OpenAIRE |
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