From the Growth to the Exploitation of 2D Materials

  • 7 June 2023
  • 13:00 - 14:00
  • DAV.0.29

Speaker: Dr Nilanthy Balakrishnan

The pressing demand for miniaturized devices can be full filled by two-dimensional (2D) semiconducting materials. Among the 2D semiconducting materials, indium selenides are attracting great attention due to their desirable electronic and optical properties1, which are relevant for several applications in electronics, optoelectronics, and thermoelectrics2,3. Particularly, indium selenides belong to a complex system with different stoichiometry, including InSe, In2Se3, and In4Se3, and their different polytype phases (α, β, γ, etc.). These compounds have band gaps in the near-infrared to visible range (1.2 – 2 eV) of the electromagnetic spectrum2, high electron mobility at room temperature (> 0.1 m2/Vs)1, room temperature ferroelectricity4,5 and a layer thickness dependent “Mexican hat” valence band energy dispersion6. On the other hand, the other metal chalcogenides ZnS, and CdS are becoming attractive due to their unique electronic and optical properties. ZnS is a wider-bandgap semiconductor (Eg ≈ 3.7 eV), a good candidate for UV sensors, infrared windows, photonics, lasers, and solar cells, and a good thermoelectric material7. Moreover, the ZnS/CdS heterostructure enhanced the photocatalyst and shows promise for future solar energy harvesting technologies8.

In this seminar, I will present our recent development on the 2D material growth and exploitation of the grown materials.



1. Bandurin, D.A., et al., Nat. Nanotechnol.. 12, 223-227, (2017).

2. Huang, W., et al., Cryst. Eng. Comm.. 18(22), 3968-84, (2016).

3. Lei, S., et al., Nat. Nanotechnol., 11(5), 465-71, (2016).

4. Hu, H., et al., Appl. Phys. Lett., 114, 252903, (2019). 

5. Zheng, C., et al., Sci. Adv., 4(7), eaar7720, (2018).

6. Debbichi, L., et al., J Phys Chem Lett, 6(15), 3098-103, (2015).

7. Es-Smairi, A., et al., Mater. Res. Express 6, 125047 (2019).

8. Wang, J., et al., RSC Adv. 7, 24864 (2017).

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