Solid-state coolers run 10% colder when current flows with a graded Seebeck coefficient
The solid-state coolers that keep insulin cold and lasers steady just gained a new design lever. Researchers built a chemical-potential gradient into an n-type Bi2Te2.7Se0.3 single crystal, spreading the Seebeck coefficient across roughly 50 microvolts per kelvin along the leg and proposing…