Figure 5 | Scientific Reports

Figure 5

From: Directional emission of white light via selective amplification of photon recycling and Bayesian optimization of multi-layer thin films

Figure 5

(a) Common angular and spectral distribution of relative power of a white LED without a multi-layer thin film. (b) Spectrum of a white LED with a multi-layer thin film that contains \(28.9\%\) more relative power compared to the reference design in forward direction. In each case, the blue chip wavelength (\(440 \text { nm}\)) and the green and red wavelengths (\(555 \text { nm}\)) and \(600 \text { nm}\)) of the conversion materials are indicated by vertical dashed lines. The horizontal grey line indicates the \(\pm 25^\circ\)-forward direction. The color map for the heat maps coincides with Fig. 6.

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