Speaker: Siddhartha Saggar
Affiliation: University of Queensland


Several contemporary applications like data communication and biomedical sensing and imaging, require devices for light sensing. A class of next-generation light sensors is organic material based photodetectors. Though similar in design to organic solar cells, organic photodiodes (OPDs) have a different set of figure-of-merit which uniquely affects the optimisation of device architecture. In the presentation, we briefly cover some key figure-of-merit of OPDs, and also take up in detail the speed of OPD response. This parameter is associated with the device’s ability to detect fast variation in incident light intensity and is pertinent towards faster data communication applications. We introduce a strategy for augmenting response-speed of OPDs, and support it through experimental and analytical justification. Resultantly, we report amongst the first, solution-processed OPDs with response-speed in MHz domain without application of external bias voltage to reduce charge-transit times.

Reference: Adv. Funct. Mater 31, 19, 2010661 (2021)

About Physics Seminars

The weekly Physics Seminar series focuses on a broad range of physics research within SMP, along with frequent presentations from visiting researchers. Seminars are usually scheduled for 1.00pm on Tuesdays.

The talks are typically more specialised than a colloquium but are often attended by staff and PhD students across a broad range of areas. Speakers are thus encouraged to include introductory material in the talks.

All SMP researchers and HDR students are encouraged to speak. Please email Lewis Williamson to register your interest.

The seminars are open so there is no need to register your attendance.


Physics Annexe (06)
407 (or via Zoom https://uqz.zoom.us/j/94116861984