Osram claims a new efficiency record for an infrared LED chip: In the lab, the prototype achieved an efficiency of up to 72 percent. With a wavelength of 850 nanometers the chip has been designed in particular for infrared illumination applications. The development is also relevant for automotive night vision systems and precrash sensors.
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, lighting systems vendor Osram claims. The efficiency was measured at room temperature and at a dc current up to 1 amp.
The results from Osram's R&D laboratory in Regensburg have created a new milestone. The prototype of a 1 mm2 chip in infrared thin-film chip technology has achieved an efficiency of 72 percent from an operating current of 100 mA. This efficiency, known as wall plug efficiency (WPE), indicates the ratio of radiated power to electrical input power.