POB seminar - Dr Alan Bowman - "Combining photoluminescence and first principles modelling to probe nanoscale interfaces"


Event details

Date 11.05.2023
Hour 18:1520:15
Speaker Dr Alan Bowman
Category Conferences - Seminars
Event Language English
EPFL Photonics Chapter (EPC) is pleased to invite you to our monthly POB (Pizza-Optics-Beer) seminar! It is set to take place on Thursday, May 11, 2023, at 18:15 in CO 122.
For organizational purposes, please register for the event using this doodle before May 11, 2023.
This month, Dr Alan Bowman will give a talk on his work "Combining photoluminescence and first principles modelling to probe nanoscale interfaces " :

Light driven machines, including solar cells, photochemical and photoelectrochemical devices, are being rapidly developed as we transition towards a zero carbon society. Interfaces play a key role in these devices and must be optimised in order to achieve high efficiencies, requiring a combination of state-of-the-art measurement techniques and modelling. In this talk I present an example of the power of combining photoluminescence and first principles modelling.

Enabling efficient triplet charge transfer between singlet fission materials and halide perovskite semiconductors is key to realising a new form of highly efficient solar panel. Here we applied photoluminescence to observe this charge transfer. Our results motivated us to simulate two-particle excited states at this interface, which revealed bottlenecks for charge transfer and identified new routes to better control the interface.

This works showcases the potential of combining spectroscopy and DFT within a single study, and, excitingly, at comparable length scales. Ultimately this enables new approaches to optimise sustainability-related devices. 


You don't know POBs?
POBs (Pizza-Optics-Beer) are monthly seminars organized by the student association EPFL Photonics Chapter.
A PhD or a postdoc gives a 20-minutes presentation about his/her research in photonics. Discussions continue informally around pizza and beers!
The event is free and open to anyone.

We thank the Doctoral Program in Photonics (EPDO), the Society of Photo-Optical Instrumentation Engineers (SPIE.), Optica and SwissPhotonics for their support.


Practical information

  • General public
  • Free
  • This event is internal


  • EPFL Photonics Chapter (EPC)


  • Mischa Flór, Elif Nur Dayi, Felix Wechsler, Li Zhang