Online Seminar Announcement: Thursday 7 May 2020

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: Thursday 7 May

Time:
1pm (QLD, NSW, ACT, Vic, Tas)
12:30pm (SA, NT)
11am (WA)

Click this link to join the meeting: https://jcu.zoom.us/j/95510880226?pwd=OEhnS2c1d3BGdkdTV1Mwd2F4V21QUT09

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

Time (East coast, adjust as needed): Presentation:
1:00 – 1:25pm Microstructure formation in solution-processed semiconducting polymer thin films
Prof. Chris McNeill
Monash University

Semiconducting polymers are interesting materials that are being developed for a wide range of applications including polymer field-effect transistors, polymer solar cells, and polymer light emitting diodes. The performance of such devices is strongly dependent upon the thin film microstructure of the active semiconducting polymer thin film. As semiconducting polymers are processed from solution, the resulting thin film microstructure is complicated and can be hard to control. In this presentation I will present research performed in my group aimed at understanding how microstructure forms in solution-processed semiconducting polymer thin films. A focus will be placed on the n-type naphthalene dimide-based polymer P(NDI2OD-T2) which exhibits a rich microstructure and good performance in field-effect transistors and polymer solar cells. The influence of molecular weight and processing conditions on thin film microstructure will be discussed, along with the impact of thin film microstructure on field-effect transistor performance. This talk will also feature a host of different synchrotron-based techniques that have been used to understand the polymer physics and microstructure of this system.

1:25 – 1:50pm Charge transport in disordered materials for photodetector applications
Dr. Almantas Pivrikas
Murdoch University

Non-crystalline disordered semiconductors such as organic molecules, polymers, nanoparticles offer great advantage for electronic devices where the novel physics as well is yet to uncovered. All these materials lack long range structural order and have one common feature – their electrical conduction is inferior compared to highly-crystalline inorganic semiconductors such as silicon because of orders of magnitude lower electron and hole mobilities as well as strong recombination rates. Yet, organic electronic devices made using these disordered materials have the performance comparable to their classical inorganic counterparts.
Photoconductivity and charge transport measurement techniques such as Time-of-Flight or Hall-effect are typically not applicable or unreliable to study the charge transport in these disordered systems. In this presentation the core problems with experimental issues will be explained and our novel techniques introduced. Our work relating to hot photocarrier utilization in photodetectors as well as the novel peculiarities of charge carrier recombination in crystalline and disordered semiconductors will be demonstrated.

 

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.

Call for abstracts

The next online seminar will be held on Thursday 4 June 2020.

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.