Speaker:
Dr. Deidra R. Hodges

Associate Professor, Electrical and Computer Engineering at Florida International University

When: 1:00pm, December 2, 2021

Place: EC 3327, Mechanical Engineering Department Conference room, Florida International University (FIU), EC Campus, 10555 W Flagler St Miami, Florida 33174.

The methylammonium lead iodide CH3NH3PbI3 (MAPbI3) perovskites have attracted a lot of attention as a possible absorber material for thin-film solar cells due to their bandgap energy, high optical absorption coefficients and low-cost solution-processing deposition approaches. MAPbI3 perovskite solar cells have evolved with transformative potential with laboratory efficiencies greater than 20%. Perovskite absorber materials are very inexpensive to synthesize and simple to manufacture, making them an extremely commercially viable option. Perovskites of compositional variations ABX3 can yield a range of crystal structures, phases, and stabilities. Here, we probe perovskites of compositional variations ABX3. We report on the structural and optical properties of these perovskites. Photovoltaic (PV) devices were fabricated using these high tolerance factor perovskites. We report we have achieved power conversion efficiencies (PCEs) greater than 21% using the high tolerance factor perovskites investigated. The high tolerance perovskites were also characterized using synchrotron X-ray absorption near edge structure (XANES) spectroscopy at the National Synchrotron Light Source (NSLS) II at Brookhaven National Laboratory (BNL).    

Link for this meeting: https://fiu.zoom.us/j/93328310744?pwd=QzB6TW1rcU1GUU1SOW5WRzBLOFlLUT09           

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