The new 1 mm2 infrared chip prototype from Osram Opto Semiconductors has achieved a new record with an efficiency of up to 72 percent at 100 milliamps using thin-film technology. At 930 milliwatts from an operating current of 1 amp, its light output under laboratory conditions is 25 percent higher than that of the chips currently available on the market, which means that future infrared LEDs can be made even more energy-efficient.
The efficiency, known as wall plug efficiency (WPE), indicates the ratio of the radiated power to the electrical input power. It was measured at room temperature at a DC current of up to 1 amp. With a wavelength of 850 nanometers, the chip has been designed specifically for infrared illumination applications.
The results from the Osram R&D laboratory in Regensburg have created a new milestone. The prototype 1 mm2 infrared chip has a high quantum efficiency that remains around 65 percent up to 1 amp. The 850 nanometer wavelength of the chip prototype is perfect for infrared illumination, particularly for surveillance tasks and use with CCTV cameras. There are also potential safety applications in the automotive sector, such as precrash sensors and illumination sources for night vision systems.
The results of this development work are now being implemented stage by stage. The new chip is expected to go into series production by the middle of 2013.