Researchers are exploring the use of gallium nitride, known for its ability to withstand temperatures above 500 degrees Celsius, in high-temperature environments like Venus. With surface temperatures reaching a scorching 480 degrees Celsius, Venus poses significant challenges for both humans and machines. One obstacle preventing the deployment of probes to Venus is that silicon-based electronics cannot endure such extreme temperatures for extended periods.
In a recent publication in Applied Physics Letters, a group of scientists from MIT and other institutions delved into the properties and performance of gallium nitride at exceptionally high temperatures. Their study focused on examining the impact of temperature on ohmic contacts within gallium nitride devices. These contacts play a crucial role in connecting semiconductor devices to the external world.
Surprisingly, the researchers discovered that extreme temperatures did not cause significant degradation to either the gallium nitride material or the ohmic contacts. Even after enduring exposure to 500 degrees Celsius for 48 hours, the structural integrity of these ohmic contacts remained intact, defying expectations.
This investigation into the behavior of ohmic contacts within gallium nitride devices at extreme temperatures is a critical step toward the team's ultimate objective: developing high-performance transistors capable of functioning on Venus's surface. Moreover, these transistors could find applications on Earth, such as facilitating geothermal energy extraction or monitoring the internal workings of jet engines.
Gallium Nitride Shows Promise in High-Temperature Environments, Including Venus
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