Methods to re-capture lost energy using thermoelectric material

Methods to re-capture lost energy using thermoelectric material

A low-temperature method for making the high-performance thermoelectric material that could recapture lost energy has been developed by a researcher at KAUST.

According to the latest research, the vast amount of energy that machines emit can be recaptured using nanometer developed at KAUST.

This nanometer can capture the energy lost by devices,ranging from mobile phone to vehicle engine.

“Among the many renewable energy sources,waste heat is not widely considered,”  says Mohamad Nugraha a postdoctoral researcher in the Derya Baran’s lab.

Waste heat emitted by machine and devices could be recapture using thermoelectric material.

Basically, this substance has a property that means that one side of the substance is hot and the other is cold, an electric charge build-up along the temperature gradients.

Baran Nugraha and their colleagues have developed a new thermoelectric material by spin coating a liquid solution of nanomaterials called quantum dots.

After repeating the spin coating layer by layer to form 200 nanometer thick film,gentle thermal annealing dried the film and complete fabrication.

Thermoelectric research has basically focused on the material processed at very high temperatures Above 4000 C Nugarah says. The quantum dot based thermoelectric material is only heated up to 1750C.

Due to this lower processing temperature could cut down the production cost and means that thermoelectric device could be formed on a broad range of surfaces, including cheap flexible plastic.

The team material showed the promising thermoelectric important parameter of good thermoelectric is the Seebeck coefficient, which corresponds to the voltage generated when a temperature gradient is applied ”We found some key factors leading to enhanced Seebeck coefficient in our materials” Nugraha says.

This team was able to show an effect called the quantum confinement, which alters material electronic properties when it is shrunk to the nanoscale, was important for enhancing the Seebeck coefficient.


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