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

Autor:	S. N. Lipnitskaya, K. D. Mynbaev, V. E. Bugrov, A. R. Kovsh, M. A. Odnoblyudov, Alexey E. Romanov
Rok vydání:	2013
Předmět:	Total internal reflection Materials science Physics and Astronomy (miscellaneous) Computer simulation business.industry Phosphor Radius engineering.material Light scattering Optical coating Coating engineering Optoelectronics business Refractive index
Zdroj:	Technical Physics Letters. 39:1074-1077
ISSN:	1090-6533 1063-7850
DOI:	10.1134/s1063785013120213
Popis:	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).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::905574cc9671aaf60f45365c67b6af7c https://doi.org/10.1134/s1063785013120213 Zobrazit plný text záznamu Plný text ve formátu PDF