@article{stokes01, author = {Edward Stokes and Thomas McNulty and Alok Srivastava and Scott Prahl and Daniel Doxsee}, title = {Absorption and scattering in phosphor-polymer dispersions for solid state white lighting applications}, journal = {American Physical Society March Meeting, Session X29 --- Wide Bandgap Semiconductors V: GaN and Related Materials}, pages = {X29.013}, year = {2001 abstract only}, abstract = {Solid state white lamps are commonly constructed by depositing a layer of phosphor-polymer dispersion on a blue InGaN quantum well LED. We investigated, with absorption and photoluminescence spectroscopies, the optical properties of YAG:Ce phosphor dispersed in silicone polymer. Transmission and reflectance in the directional-hemispherical configuration were acquired for various compositions and thicknesses of dispersions. Coefficients of absorption and scattering were extracted using inverse adding doubling algorithm to solve the radiative transfer equation. Parameters so extracted can be used to predict transmittance, downconversion efficiency, and color from absorption spectroscopic measurements. Transmittance and downconversion efficiency were independently measured with photoluminescence spectroscopy for comparison. Application to modeling for solid state lighting white applications is explored.}, }