Fig. 1. Device structure diagrams. (a) Reference device structure; (b) metal nanoparticles on cathode surface (Device1); (c) metal nanoparticles in ETL (Device2); (d) metal nanoparticles on anode surface (Device3)

Fig. 2. Refraction coefficient and extinction coefficient of material. (a) Refraction coefficient; (b) Extinction coefficient

Fig. 3. Normalized spectra and transmittances. (a) Normalized output spectra of Au and Ag when wavelength of input light source is 468 nm; (b) normalized output spectra of Au and Ag when wavelength of input light source is 534 nm; (c) normalized output spectra of Au and Ag when wavelength of input light source is 618 nm; (d) transmittances of Au and Ag when wavelength of input light source is 468 nm; (e) transmittances of Au and Ag when wavelength of input light source is 534 nm; (f) transmittances of Au and Ag when wavelength of input light source is 618 nm

Fig. 4. Transmittances of different nanoparticles under three wavelengths. (a) Ag; (b) Au

Fig. 5. Simulation results of inserting Ag NPs in different positions. (a) without inserting Ag NPs; (b) on cathode surface; (c) in middle of ETL; (d) on anode surface