It can look at ‘how solar cells perform, how they change with time and aging, and how good a solar cell they are’.
This is where Jamie Laird's device comes in. A Research Fellow at the ARC Centre of Excellence in Exciton Science and the University of Melbourne, Laird invented the new machine for testing the defects in perovskite solar cells, the first of its kind anywhere in the world.
It was a do-it-yourself device that started as a hobby and took off during Covid-19; and now it could help unlock the next generation of solar energy, including advanced technology for space missions.Understanding the issues that kept perovskites from fulfilling their promise The device, an example of micro-spectroscopy, is a combination of a microscope and a special laser. It produces pictures and maps of the defects within, thereby revealing where the cells are losing power or efficiency over time and use. What's better is it also provides data to indicate why.
The technique was originally intended to analyze minerals and was solely meant as a personal project for Laird., Laird realized that his gadget could be a handy tool to help his colleagues and other solar cell researchers around the world. It would help them better understand the issues that kept perovskites from fulfilling their "exciting promise"."The basis of the technique is microscopy but merging it with frequency analysis.
"You can’t have a solar cell that decomposes quickly when it’s meant to last 20 years in the field. This is a missing link in the repertoire of techniques we have to throw at that problem," Laird added.In this report, a large-area laser beam-induced current microscope that has been adapted to perform intensity modulated photocurrent spectroscopy in an imaging mode is described.
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