Quantum dots now used in place of phosphors for LED lighting

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By eeNews Europe

The light that is re-emitted when blue LED light hits the quantum dots depends on the size of the particles. For example, QD particles that are roughly three nanometers in size produce green light, while particles around seven nanometers emit red light. This tunable light conversion technology is now being used in the Osconiq S 3030 QD mid-power LED from Osram Opto Semiconductors, which the company says is a first for the general lighting market. The Osconiq S 3030 QD was specially developed for area lighting and downlight applications. The great advantage of using QDs is that the existing LED manufacturing processes remain the same. Tunable QDs are simply used instead of conventional phosphors when the converter material is applied.

More than a year ago Osram acquired Pacific Light Technologies (PLT), a leading company in the development and manufacturing of high-performance optical nanomaterials. The PLT QD technology enables Osram to begin to close the efficacy gap that exists between CRI 80 and CRI 90 LEDs today. The Osconiq S 3030 includes a specially developed QD phosphor solution that enables CRI 90 to achieve an outstanding efficacy value of 173 lm/W at 3000 K – a best-in-class value for 0.2W high-performance LEDs. The 3.0×3.0mm device is available in various color temperatures from 2,700 to 6,500 K.



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