New Arxiv Paper – Visible and infrared photocurrent enhancement in a graphene-silicon Schottky photodetector through surface-states and electric field engineering

Nawapong Unsuree has submitted a new paper to the Arxiv reporting on work coming from a recent collaboration between the Echtermeyer group (Manchester) and the Parkinson group. The research was conducted in the National Graphene Institute and the Photon Science Institute.

Following on from recent work developing graphene-silicon Schottky photodiodes, this new research reports the application of infrared scanning photocurrent microscopy to new devices with structured electric field, to reveal a ten-fold enhancement in photocurrent responsivity close to lateral edges.

This research paves the way towards high-sensitivity infrared photodetectors based on the graphene-silicon architecture.

Reference: “Visible and infrared photocurrent enhancement in a graphene-silicon Schottky photodetector through surface-states and electric field engineering“, Unsuree et al. arXiv:1901.10998, 2019

MPhys projects 2018 – Welcome

The group welcomes four undergraduate MPhys students who will spend the semester working on their final year project:

  • Lily Shepherd and Rachel Clark return to work on compressive sensing applications for future photovoltaic characterization.
  • Jade Clarke and Eadie Weston will start a new project on open-science, looking to create 3D printable optomechanical actuators.

New Paper – Emission Properties and Ultrafast Carrier Dynamics of CsPbCl3 Perovskite Nanocrystals

Visual abstract
Emission and absorption of perovskite nanocrystals, with associated electron microscopy

Congratulations to Ruben Ahumada-Lazo for his new paper on emission properties of perovskite nanocrystals. In his new paper, published in ACS Journal of Physical Chemistry C, he used ultrafast and high-fluence optical techniques based at the Photon Science Institute to reveal the radiative and non-radiative recombination pathways in CsPbCl3 perovskite nanocrystals.

In this collaboration between the Binks group (Manchester Physics), Parkinson group (Manchester Physics), the Ducati group (Cambridge Materials), and the Humphreys Group (Cambridge Materials), a combination of synthesis, electron microscopy, photoluminescence and transient absorption are combined to reveal exciton, biexciton and trion lifetimes.

The new work is available online:
“Emission Properties and Ultrafast Carrier Dynamics of CsPbCl3 Perovskite Nanocrystals”, J. Phys. Chem. C, Just Accepted Manuscript DOI: 10.1021/acs.jpcc.8b11906