Funded MSc/PhD Studentship at the Two-Dimensional Materials and Devices Group [Starts in Oct 2021]

Funded MSc/PhD Studentship at the Two-Dimensional Materials and Devices Group

Topic:

Development of Direct Bandgap 2-Dimensional Rhenium Disulfide (ReS2) for High Responsivity and Fast Response Time Near-Infrared Photodetectors

Project Summary:

Photodetectors require a direct bandgap material to efficiently convert light to electrical signals. However, choices of direct bandgap materials are limited and typically dominated by the expensive III-V semiconductors. Two-dimensional rhenium disulfide (ReS2) has been predicted to have a direct bandgap from bulk to monolayer. Despite the large responsivity (up to 107 A/W), the response time of ReS2 photodetector is relatively slow (>10s of milliseconds). Due to the slow response time, ReS2 photodetector is currently impractical for high-speed applications such as time-of-flight remote sensing and data communications.

In this project, student will involve in several of the following activities:

  • Investigate the structural, optical and electronic properties of 2D ReS2 by first principles calculations
  • Synthesize high quality ReS2 nanoflakes by chemical vapor deposition
  • Characterize the structural and optical properties of ReS2 flakes
  • Improve the quality of ReS2 by post-growth processes (eg. thermal annealing)
  • Fabricate ReS2 devices and assess the electrical performance of the photodetectors

Requirements:

  • Highly motivated
  • Bachelor or Master in Material Science, Applied Physics or Electrical & Electronics Engineering. CGPA >3.0 or equivalent.
  • Experience in Density Functional Theory (DFT) is an advantage.
  • This studentship includes monthly allowance of RM 1,500-1,800. This studentship does not cover tuition fees. Student is encouraged to apply for UKM Zamalah for tuition fees waiver.
  • Expected start date: Oct 2021.

For interested candidates, please email your CV to Dr. Abdul Rahman Mohmad at armohmad@ukm.edu.my