New semi-conductor material discovered by scientists 

Almost all modern technology – even the laptop or smartphone you are using to read this article, rely on materials known as semiconductors. These are found not just in computer devices but also in electronic cars, refrigerators, LEDs, etc. Recently, a study conducted by researchers at the University of Edinburgh, and a range of European partners discovered a new form of semiconductors that work more efficiently than conventional semiconductors. 

Currently, conventional semiconductors use silicon as their main material. However, with ever-growing advancements in technology, there is demand for a more efficient semiconductor that can convert electricity to light, and vice versa. The research team led by Doctor George Serghiou thought that an alloy of tin and germanium would be superior to conventional silicon-germanium semiconductors, but the issue was that these two elements do not readily mix with each other under normal conditions. 

The research therefore required conditions that were not normal. Doctor Serghiou’s team exposed tin and germanium to extreme conditions of 1200 degrees Celsius and 10 gigapascals – this is hundred times the pressure produced at the bottom of Mariana trench, the deepest point in the ocean. The newly produced alloy possessed the desired structure where tin and germanium atoms were able to interact stably under normal conditions. 

“This work opens up fertile avenues for new materials design through our newly defined in-concert route of creating reactivity and directing recovery of materials with desired crystal structure. This is demonstrated here towards addressing the growing power demand of electronic devices and data centres that need innovative paths to new materials that could boost energy efficiency by using light” Doctor Serghiou told the university’s press office. 

This new alloy absorbs and emits light better than conventional silicon-based semiconductors with less energy usage. Why is that? Silicon, germanium and tin are all group 14 elements, going down the periodic table in that order. This means that tin is a much larger atom than silicon with its valence electrons (electrons in the outermost shell of an atom) located further away from the nucleus. The “looseness” of valence electrons caused by this distance from the nucleus determines the electrical property of an element, which makes tin a much better electrical conductor than silicon. 

Improved electrical conductivity is key for optoelectronic devices which are gadgets that interact with light, for example LEDs and solar cells. This makes the invention of this new material a key step towards cleaner energy usage in modern technology.  

Written by Kazuma Oura, February 22, 2026.

Edited by Marina Milsum.