Online Seminar Announcement: Wednesday 7 April 2021

Due to the cancellation of many scientific conferences, the AUCAOS committee is pleased to announce an online seminar series. We intend to run seminars on the first Wednesday of every month until normal conferences can resume.

Date: Wednesday 7 April 2021

Time:
1pm in QLD, NSW, ACT, Vic, and Tas
11am in WA
12:30pm in NT
12:30pm in SA
3pm in New Zealand

Please note different times in some states due to the end of daylight savings time.

Click this link to join the meeting: https://jcu.zoom.us/j/86449047647

Seminar schedule
Each talk is 20 minutes duration followed by approximately 5 minutes for questions and discussion.

Time (QLD time, adjust as needed): Presentation:
1:00 – 1:25pm Organic Polariton Lasing with Molecularly Isolated Perylene Diimides

Dr. Girish Lakhwani
Sydney University

In the last decade, strong light matter coupling has become an alternative path to achieve lasing in organic materials via use of polaritons. Polariton lasers do not require population inversion and thus hold the promise of lower laser thresholds. Organic materials are particularly suited for polariton lasing as their large absorption coefficients result in impressive exciton-photon couplings strengths at room temperature. Here I will demonstrate polariton lasing in a molecularly isolated perylene diimide. [1,2] The emission exhibits threshold behaviour, spatial coherence, and the characteristic blue-shifting of polariton systems. We expect perylene dyes will become a useful polariton laser class.

1. Sabatini et al. J Mater Chem C, 7, 2954 (2019)
2. Sabatini et al. Appl. Phys. Lett, 117, 041103 (2020)

1:25 – 1:50pm Optimal quantum dot size for photovoltaics with fusion

Dr. Laszlo Frazer
Monash University

Light fusion increases the efficiency of solar cells by converting photons with lower energy than the bandgap into higher energy photons. The solar cell converts the produced photons to current. We use Monte Carlo simulation to predict that lead sulfide quantum dot sensitizers will enable fusion with a figure of merit on the mA/cm^2 scale, exceeding current records, while enabling silicon cell compatibility. Performance is highly sensitive to quantum dot size, on the order of mA/cm^2/nm.

1:50 – 2:00pm Open discussion

 

During the seminar:

  • Please keep your microphone muted unless you are speaking. This is to reduce the background noise and avoid disrupting the presenter.
  • You will be automatically muted when you join the virtual meeting room. To speak, you will need to unmute yourself by using the audio controls in the lower left of the Zoom window.
  • If you have not used Zoom before, then it is recommended that you join 5 minutes before the starting time to ensure that you have your software set up correctly.

Please be aware that the talks will be recorded and posted on the AUCAOS website.

Previous seminars

Previous seminars can be viewed here: https://seminars.aucaos.org.au/

Call for abstracts

Seminars are held on the first Wednesday of each month.

In the spirit of building a community in these challenging times, you are encouraged to give a talk. Do you have a talk that you would have given at a conference that was cancelled? Please consider adapting that talk for this format.

Submit abstract by email to bronson[dot]philippa[at]jcu[dot]edu[dot]au.