Effects of light scattering in optical coatings on energy losses in LED devices View Full Text


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Article Info

DATE

2013-12-28

AUTHORS

S. N. Lipnitskaya, K. D. Mynbaev, V. E. Bugrov, A. R. Kovsh, M. A. Odnoblyudov, A. E. Romanov

ABSTRACT

The effect of light scattering in phosphor-containing optical coatings on energy losses in chip-on-board LED devices is considered. The energy losses have been evaluated by numerical simulation with the refractive index of the coating material (n = 1.4–1.8) and the average radius of dispersed phosphor particles (R = 5–50 μm) being the variable parameters. It is established that the energy losses most significantly depend on the level of total internal reflection at the coating/air interface. In the LED device configuration studied, the optimum refractive index of the coating material is n = 1.4. It is also found that, in order to reduce the energy losses related to light scattering on phosphor particles, it is expedient to use phosphors with coarse particles (R = 50 μm). More... »

PAGES

1074-1077

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063785013120213

DOI

http://dx.doi.org/10.1134/s1063785013120213

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005231906


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