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Osram red LED prototype breaks 200lm/W efficiency barrier

Osram Opto Semiconductors GmbH of Regensburg, Germany says that its R&D lab has achieved a record electro-optical efficiency of 61% for a red high-power LED. The 1mm2 chip housed on a laboratory package emits at a wavelength of 609nm (λ-dom) and has achieved a record luminous efficiency of 201lm/W at an operating current of 40mA. At a typical operating current of 350mA its luminous efficacy is still 168lm/W, so even at this high wattage more than half of the electrical energy is converted into light.

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