Charge Transfer from Lead Sulfide Quantum Dots to MoS2 Nanoplatelets
| Autor: | A. S. Mudrak, S.A. Cherevkov, Aliaksei Dubavik, A. P. Litvin, M. A. Baranov, Anastasiia Sokolova, I. D. Skurlov, Peter S. Parfenov |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Range (particle radiation) Electron mobility Materials science business.industry Photoconductivity 01 natural sciences Exfoliation joint Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics chemistry.chemical_compound chemistry Quantum dot 0103 physical sciences Optoelectronics Lead sulfide business Molybdenum disulfide Order of magnitude |
| Zdroj: | Optics and Spectroscopy. 128:1236-1240 |
| ISSN: | 1562-6911 0030-400X |
| Popis: | The research interest in the transition metal dichalcogenides (TMD) has been reborn a few years ago. This had happened due to the remarkable properties of monolayered TMD (e.g., high carrier mobility and high exciton binding energy) and due to the development of the exfoliation methods. Photoconductive MoS2-based devices spectral range can be expanded to the NIR by coupling them with PbS QDs. However, this requires extensive knowledge about the charge and energy transfer processes in such systems. In this paper, we investigate charge transfer between PbS QDs and MoS2 nanoplatelets (NPls). Using the PL decay analysis, we show how the charge transfer efficiency changes with the distance between the QDs and NPls, as well as with QD size. Last, we demonstrate that the addition of the MoS2 NPLs increases the photoconductive response for up to an order of magnitude, as compared to the bare QD. |
| Databáze: | OpenAIRE |
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