Show-Me State Times

Scientists at the University of Missouri are exploring the potential of halide perovskites, a material that could significantly impact energy-efficient optoelectronics. Physics professors Suchi Guha and Gavin King are investigating these materials at the nanoscale to harness their unique properties for converting sunlight into energy. This research may lead to more affordable and efficient solar panels and longer-lasting LED lights.

Guha, an expert in solid-state physics, described halide perovskites as "the semiconductors of the 21st century." Her lab has focused on optimizing these materials for sustainable optoelectronic devices over the past six years. The team uses chemical vapor deposition, a scalable method developed by former graduate student Randy Burns with Chris Arendse from South Africa's University of the Western Cape, to produce solar cells.

The team examined the optical properties of halide perovskites using ultrafast laser spectroscopy. For further optimization in electronic applications, they collaborated with King. Specializing in biological physics, King employed ice lithography to fabricate materials at nanometer scale by cooling them to cryogenic temperatures and using an electron beam.

King likened this process to using a "nanometer-scale chisel," explaining that it allows for creating intricate patterns on thin films to develop foundational layers in optical electronics.

The collaboration between Guha and King has been mutually beneficial. Guha noted, "I find it exciting because, on my own, there are only so many things I can do... But when you collaborate, you get the full picture and the chance to learn new things." King echoed this sentiment: "Everyone brings a unique perspective... If we were all trained the same way... we wouldn’t allow us to accomplish as much."

Their work contributes to Mizzou's innovative energy research efforts at the Center for Energy Innovation.