Across The spectrum: Researchers fatd way atto stabilize color Of light at next-gen materialPhys.org #February_2019

Across The spectrum: Researchers fatd way atto stabilize color Of light at next-gen materialPhys.org #February_2019

February 11, 2019 0 By NewsTakers

FSU Assistant Professor of Physics Hanwei Gao, National MagLab researcher Yan Xin and FSU graduate student Xi Wang worked with a transmission electron microscope to conduct research on halide perovskites.
Credit: FSU
A team of Florida State University physicists has found a way to stabilize the color of light being emitted from a promising class of next-generation materials that researchers believe could be the basis for efficient and more cost-effective optoelectronic technologies that can turn light into electricity or vice versa.
The research is published in Nature Communications .
Gao and physics doctoral student Xi Wang were working with a class of materials called halide perovskites.
Color tunability has always been possible with halide perovskites, but it’s not been stable.
For example, a device with this material might shine one color such as yellow, but then turn to red quickly if illuminated continuously by UV light.
“When you design it, you want it to turn out how you expect,” Wang said.
But, it was almost an accident, they said.
Gao and Wang initially set out to make a higher-quality halide perovskite film that was smoother and more uniform than existing samples.
“We were working on this synthetic approach and this nanostructure that was a part of that,” he said.

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