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(a) Top-view SEM images of three different MNP structures on a ITO/glass substrate (Au-NP, Ag-NP1, and Ag-NP3), (b) current-voltage (I-V) characteristics of four different LED samples, and (c) light output intensity (EL; electroluminescent intensity) of four different LED samples as functions of the injection current (L-I characteristics).
(a) Calculated volume extinction coefficients for three different samples with MNPs (Ag-NP1, Ag-NP2, and Au-NP). (b) Calculated effective refractive indices (solid lines), and effective refractive indices used for calculation of angular reflectances in Fig. 3 (circular symbols).
Angular reflectances at three different wavelengths (480, 510, and 540 nm) (a) for Ag-NP1 sample and (b) for Ag-NP2 sample. The solid lines and circular symbols represent measured and calculated reflectances, respectively, and the dotted lines represent the measured reflectance for the sample without MNPs.
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