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Journal of Materials Science
Erschienen in: Journal of Materials Science 11/2018

01.03.2018 | Energy materials

Layer-controlled synthesis of wafer-scale MoSe2 nanosheets for photodetector arrays

verfasst von: Tian-Jun Dai, Xu-Dong Fan, Yi-Xuan Ren, Shuang Hou, Yi-Yu Zhang, Ling-Xuan Qian, Yan-Rong Li, Xing-Zhao Liu

Erschienen in: Journal of Materials Science | Ausgabe 11/2018

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Abstract

Despite huge efforts have been devoted to investigating ultrathin layers of two-dimensional (2D) transition-metal dichalcogenides (TMDs), their realistic applications in electronics and optoelectronics are hindered by limited scalability and uniformity of 2D thin layers. In this work, a two-step synthesis method was adopted to produce wafer-scale molybdenum diselenide (MoSe2) nanosheets. Molybdenum oxide (MoO3) thin film was initially prepared via atomic layer deposition (ALD) and followed by a selenization process in chemical vapor deposition (CVD) tube furnace. MoSe2 nanosheets with desired thickness can be obtained by tuning ALD cycles in preparing MoO3 layers. The synthesized MoSe2 films exhibited excellent layer controllability, homogeneity and wafer-scale uniformity. Few-layer structure of our MoSe2 with a polycrystalline crystal structure was verified by means of Raman and transmission electron microscopy (TEM) measurements. Moreover, arrays of MoSe2-based photodetectors with different device dimension were fabricated and the photo-responses of the devices were studied. The device exhibited a fast photo-response time of 50 ms, a high on/off ratio of ~ 24 and a good photo-responsivity of 11.7 mA/W, and it is found that the effective illumination area was a critical factor for application. The work opens up an attractive approach to realize the application of wafer-scale 2D materials in integrated optoelectronic-systems.
Vorheriger Artikel A novel room temperature POSS ionic liquid-based solid polymer electrolyte
Nächster Artikel Peapod-like one-dimensional (1D) CoP hollow nanorods embedded into graphene networks as an anode material for lithium-ion batteries

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Metadaten
Titel
Layer-controlled synthesis of wafer-scale MoSe2 nanosheets for photodetector arrays
verfasst von
Tian-Jun Dai
Xu-Dong Fan
Yi-Xuan Ren
Shuang Hou
Yi-Yu Zhang
Ling-Xuan Qian
Yan-Rong Li
Xing-Zhao Liu
Publikationsdatum
01.03.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 11/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2142-6

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