Fig. 1. Device structure diagram

Fig. 2. J-V characteristic cures of the devices A₁、A₂ and A₃

Fig. 3. Multi-angle normalized spectra of devices with different cavity lengths

Fig. 4. The normalized spectra of devices with different optical transmission and coupling layers

Fig. 5. L-V and P-L-C characteristic curves of devices B₁~B₄

Fig. 6. Cathode transmission curves of devices B₁~B₄