Abstract
The 2H molybdenum telluride (MoTe2) photodetector structures were made with inserting 1T-MoTe2 interlayer contacts. The optical response properties such as photoconductivity (PC) spectroscopy, illumination intensity dependent photoresponsivity, frequency dependent photocurrent, and time-resolved photoresponse were carried out in this study. In PC spectra, a much higher photoresponsivity of 2H-MoTe2 were observed by inserting 1T-MoTe2 interlayer contact. The frequency dependent photocurrent and time-resolved photoresponse investigations explore the carrier kinetic decay process of MoTe2 with different electrode contact. The Schottky barrier heights (SBH) extracted by thermionic emission theory were also investigated by inserting 1T-MoTe2 interlayer contacts. The results show the potential applicability for photodetection devices based MoTe2 layered transition metal dichalcogenides semiconductors.
Highlights
Crystals 2021, 11, 964. https://The discovery of single layered graphene opened up new possibilities and research for the characteristics of two-dimensional (2D) materials [1,2]
In this report we have demonstrated that the photoresponse properties of 2H-MoTe
In this report we have demonstrated that the photoresponse properties of 2H-MoTe22 can be improved by inserting 1T-MoTe2 interlayer contact
Summary
The discovery of single layered graphene opened up new possibilities and research for the characteristics of two-dimensional (2D) materials [1,2]. TMDCs can be semiconductors, semi-metals, metals, or even superconductors. Such properties make them highly attractive for lots of studies of novel physical phenomena [6]. TMDCs layered 2D materials with atomic thickness are promising due to their potential use in nanoelectronics and optoelectronics for generation devices [7,8], such as fin-shaped field effect transistors (FET) [9], FET with sub-10 nm channel length [10], inverter [11], on-chip light emitting diode [12], and Van der Walls heterostructure devices [13]. The most common used TMDCs such as MoS2 and MoSe2 have a band gap of 1.85 [14] and
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