Please join us this Tuesday, June 13 in Physics 175 for our next presentation in our PEGASUS Summer Seminar Ser
Our next speaker is William Elcock, who studies hysteresis in perovskite solar cells.
There will be cookies and refreshments served beforehand at 3:00 pm in the lounge for those attending the seminar.
Title: Hysteresis in Perovskite Solar Cells
Perovskite solar cells have demonstrated power conversion efficiencies (PCEs) greater than 20%. However, current density-voltage (J-V) hysteresis (i.e. a difference in photocurrent between forward and reverse scans) makes it difficult to determine the true PCE of perovskite solar cells. The mechanism behind this hysteretic behaviour is not yet fully understood. However, the accumulation of halide ions at the perovskite active layer/contact interface has been put forward as a possible explanation behind this phenomenon. With this talk, I will give a background on hysteretic phenomena and the challenges posed by hysteresis in perovskite solar cells. I will also explain how the proposed ion migration mechanism results in hysteretic behaviour.