High performance encapsulants for ultra high-brightness LEDs

David W. Mosley; Kathy Auld; David Conner; Jay Gregory; Xian-Qian Liu; Angelo Pedicini; David Thorsen; Morris Wills; Garo Khanarian; Ethan S. Simon

doi:10.1117/12.761724

13 February 2008 High performance encapsulants for ultra high-brightness LEDs

David W. Mosley, Kathy Auld, David Conner, Jay Gregory, Xian-Qian Liu, Angelo Pedicini, David Thorsen, Morris Wills, Garo Khanarian, Ethan S. Simon

Author Affiliations +

Proceedings Volume 6910, Light-Emitting Diodes: Research, Manufacturing, and Applications XII; 691017 (2008) https://doi.org/10.1117/12.761724
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

The performance requirements for packaging ultra high-brightness LEDs are extremely demanding. These include high continuous use temperatures and light fluxes. Polymer encapsulants play a critical role in the extraction of light, as a host medium for the phosphors to convert blue to white light, and as capping lenses. Encapsulants must also meet critical requirements for viscosity, modulus, and optical transmission under varying environmental conditions, while having a high refractive index to maximize device efficiency. We describe the development of robust one-pot encapsulants having refractive indices of 1.57 and greater than 1.6. These encapsulants are stable at 200 °C for time periods greater than 4 weeks.

Citation Download Citation

David W. Mosley, Kathy Auld, David Conner, Jay Gregory, Xian-Qian Liu, Angelo Pedicini, David Thorsen, Morris Wills, Garo Khanarian, and Ethan S. Simon "High performance encapsulants for ultra high-brightness LEDs", Proc. SPIE 6910, Light-Emitting Diodes: Research, Manufacturing, and Applications XII, 691017 (13 February 2008); https://doi.org/10.1117/12.761724

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