Вышедшие номера
Charge Transfer from Lead Sulfide Quantum Dots to MoS2 Nanoplatelets*
Переводная версия: 10.1134/S0030400X20080330
Russian science foundation, 19-13-00332
Ministry of Education and Science of the Russian Federation, Scholarship of the President of the Russian Federation for young scientists and graduate students, SP-70.2018.1
Skurlov I.D.1, Mudrak A.S.1, Sokolova A.V.1, Cherevkov S.A.1, Baranov M.A.1, Dubavik A.1, Parfenov P.S.1, Litvin A.P.1
1ITMO University, Saint-Petersburg, Russia
Email: sky_id@itmo.ru
Поступила в редакцию: 18 января 2020 г.
Выставление онлайн: 24 мая 2020 г.

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 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. Keywords: transition metal dichalcogenides, quantum dots, charge transfer, lead sulfide, molybdenum disulfide.

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