Physics professors Suchi Guha and Gavin King from Mizzou's College of Arts and Science are leading the research. "Halide perovskites are being hailed as the semiconductors of the 21st century," said Guha, an expert in solid-state physics. "Over the past six years, my lab has concentrated on optimizing these materials as a sustainable source for the next generation of optoelectronic devices."
The team utilized chemical vapor deposition to create halide perovskites, a process fine-tuned by Randy Burns, a former graduate student of Guha, in collaboration with Chris Arendse from the University of the Western Cape, South Africa. This scalable method holds potential for mass-producing advanced solar cells.
Exploring the material's optical properties, Guha's lab employed ultrafast laser spectroscopy to better understand its functionality. To complement these findings, King introduced ice lithography, a cryogenic technique allowing nanometer-scale fabrication. "By creating intricate patterns on these thin films, we can produce devices with distinct properties and functionalities," said King, a specialist in biological physics. He likened the process to using a "nanometer-scale chisel" to carve the foundational layers of optical electronics.
The collaboration between Guha and King, despite their differing areas of expertise, has been integral to the project's success. "When you collaborate, you get the full picture and the chance to learn new things," Guha explained. "For example, Gavin's lab works with biological materials, and by combining that with our work in solid-state physics, we're discovering new applications we hadn't considered before."
King echoed the sentiment. "Everyone brings a unique perspective, which is what makes it work. If we were all trained the same way, we'd all think the same, and that wouldn't allow us to accomplish as much as we can here together."
This research exemplifies the cutting-edge work taking place at the University of Missouri's Center for Energy Innovation, where interdisciplinary efforts are driving forward sustainable energy technologies.
Research Report:Carrier relaxation and exciton dynamics in chemical-vapor-deposited two-dimensional hybrid halide perovskites
Research Report:Stabilizing metal halide perovskite films via chemical vapor deposition and cryogenic electron beam patterning
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