InfiniLED Creates MicroLEDs with High Light Output Density

InfiniLED claims its latest MicroLEDs (µLEDs) have set up the highest recorded for a commercially available LED type device, with a light output density of more than 300 W/cm2.

The device can produce up to 1mW of light from a single 20µm pixel at 405nm.

The MicroLED combines the benefits of a laser and a LED to produce ultra-high light output. The MicroLED provides the wavelength flexibility, drive characteristics and simplicity of a LED as well as the power and collimated beam of a laser.

The ability to produce such light intensity and control directly from the chip enables the light to be efficiently used in a range of applications. InfiniLED has achieved this performance using its patented MicroLED structure.

A parabolic reflector is etched into the semiconductor material during the fabrication process. This places an optical component directly at the site of light generation and at the most effective position for control of the light produced.

The MicroLED is currently being used in a range of applications included life sciences, consumer electronics and OEM equipment. The device can be fabricated as a single pixel, large clusters of pixels or as addressable arrays where each pixel is individually switchable. The single pixels can be used to produce high intensity, collimated light over a small area or to produce useable light at ultra-low currents. The single pixels produce light with a few nanoamps of current. To produce larger amounts of light, clusters of tightly packed MicroLEDs are available.

A cluster of 25 MicroLEDs beside the tip of a needle. The parabolic reflector shape can be seen in the inset close-up

This results in high light density and collimated emission over a wider area. MicroLEDs are also available as addressable arrays of pixels. The collimation from each pixel results in high packing densities and minimal crosstalk between the devices.

What's more, the high current densities achievable and low capacitance allows the MicroLEDs to be switched at very high speeds. Experimental work is on-going with the Tyndall National Institute and the results will be announced shortly.

InfiniLED will demonstrate this technology at BiOS and Photonic West in San Francisco this February. Members of the InfiniLED team will be in booth #5234 at PW and booth #8929 at BiOS as well as be giving a demonstration show on Thursday 7th February at 12.30pm in Demo Area 2 (North Hall).

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