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LED Materials


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High Brightness LED Tutorial - Overview

Since their inception in the early ‘60’s, light emitting diodes (LEDs) have gained widespread use and now can be found nearly everywhere. The devices are created by depositing two thin layers of materials onto a substrate, one with an excess of electrons and the other having “holes” and needing electrons to achieve a more stable state.  When a potential is applied across the device, the electrons and holes move in the opposite directions. This causes light to be emitted with a wavelength and color determined by the energy released when the electrons and holes combine.

Today, special deposition techniques have made possible LEDs with much higher brightness (HBLEDs) than traditional devices. This opens up many new applications such as backlighting for displays, automotive lighting and new consumer products like flash for camera phones or compact projectors. Goals for these new HBLEDs are to have them

  • Be Brighter
  • Last Longer
  • Cost Less
  • Be Compatible with Lead-free Processing

Silicones have found use in HBLEDs for many critical needs – providing electrical and environmental protection, increasing light-extraction, minimizing heat build-up and forming lenses that provide options for specific light distribution patterns and intensities. Silicone products offer good compatibility with standard LED substrates and processing techniques. Their use greatly improves HBLED device reliability and longevity.

 

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  1. High Brightness LED Tutorial - Overview


  2. Uses of Silicones for LED Applications


  3. Silicones Can Meet Needs for Performance and Reliability


  4. Inherent Advantages of Silicones


  5. Applications for Silicone in LED's


  6. Tell Us What You Need


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