Control of Heat Opens Doors for Next-gen Lighting and Displays in LEDs


In modern life, light emitting diodes (LEDs) are nearly ubiquitous that provide brightness to phone displays, lights, and televisions. To serve such expanded use, a new form of LEDs promise higher color quality and ease of manufacture. However, the new form of LEDs made of halide perovskites, fail to perform when subject to the kind of electrical current needed for practical use.

To address this, work undertaken by a team of researchers has helped to significantly improve the stability of the material and performance by better managing the heat produced by LEDs.

Techniques aid expand lifetime of Material by ten times

The research identifies several techniques that reduces the accumulation of heat within the material, resulting in ten times extended lifetime. To test this, the effort to prevent the device from overheating enabled enough current to be pumped into it, and produce light with intensity hundreds of times more than produced in a typical cell phone display. The intensity of light reflects the real amount of light discharged from the device, without being influenced by human eyes or the color of light. Previously, electric current of such intensity would have resulted in the LED to blow off.

Such an advancement establishes a new brightness record and expands the possibilities how much the material can withstand. It does so by improving the well-established properties of perovskite LEDs and allowing those features to be practically harnessed.

Meanwhile, first time it is revealed heat appears to be the major hurdle for these materials functioning at high currents. This implies the material could be used for bright lights and displays, which was earlier not thought to be possible.

The research suggests clear pathways to be now open for further development of the technology.

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