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We had some awesome presentations this past week!

, Ph.D. Candidate - Polymer Light-Emitting Electrochemical Cell with concentric circular electrodes

Abstract: Planar polymer light-emitting electrochemical cells (LECs) with concentric circle electrodes are demonstrated. With a fixed outer electrode radius of 6.8 mm, the inner electrode radius varies from 1 to 3 mm to modulate the junction position. It is possible to achieve a perfectly centred emitting junction by fine-tuning the inner electrode radius. In the following step, the outer as well as inner electrode radii were kept constant at 6.8 mm and 1mm, respectively, while introducing floating electrodes between the two electrodes. Using this technique, we improved the light-emitting area and obtained an impressive photovoltaic response. The concentric circular electrode configuration offers a cross-sectional view of a LEC-based light-emitting fibre. In any fibre-shaped light-emitting device, the inner and outer electrodes always differ in size. This electrode asymmetry should be considered and exploited to achieve optimal cell performance.

, Ph.D. Candidate - Enhancing Strong Coupling in MoSâ‚‚-Exciton and Plasmon Interactions

Abstract: Strong coupling in light-matter interactions can give rise to intriguing physical phenomena, but achieving the precise experimental conditions and material quality needed to reach this regime poses significant challenges. This talk will cover recent advances in enhancing the coupling between Molybdenum disulfide (MoSâ‚‚) excitons and nanoparticle plasmons. I will begin with a brief theoretical overview, followed by preliminary experimental results obtained last year, which focus on defect site repair using a super acid treatment. If time permits, I will also discuss ongoing efforts to optimize this system further.