Fig. 1. Structural diagram of double-layer antireflection films on the surface of solar cells. (a)(b) Textured silicon heterojunction solar cells before and after encapsulation; (c) planar silicon heterojunction solar cell after encapsulation

Fig. 2. Variation of optical loss with film thickness of i-Si and p-Si film layers

Fig. 3. Refractive index (n) and extinction coefficient (k) dispersion curves of ITO

Fig. 4. Variation of optical loss of ITO antireflection film on the surface of textured silicon solar cells with its thickness before and after glass encapsulation

Fig. 5. Variation of optical loss of TiO₂/SiN_x antireflection films on the surface of planar silicon solar cells with the refractive index of each film layer

Fig. 6. Variation of optical loss of TiO₂/SiN_x antireflection film on the surface of planar silicon solar cells with the thickness of each layer

Fig. 7. Changes of absorption loss and reflection loss of single-layer ITO film on textured silicon and TiO₂/SiN_x double-layer antireflection film on planar silicon with wavelength

Fig. 8. Changes of optical losses of single-layer ITO antireflection film on textured silicon and TiO₂/SiN_x double-layer antireflection film on planar silicon with angle of incidence