5.7. Resonant dielectric structure
Resonant dielectric structure is placed on the top of solar cell [36]. This structure can super sum very confined mode/resonant mode that can leak into the active material. Mainly dielectric nanospheres are used which is relatively insensitive to angle of incident [68]. The material used in this sphere is lossless and inexpensive made of silica and absorbing surface remains perfectly flat which is unadvantageous towards some material that have good electrical properties and we can expect 10% enhancement compared to solar cell which already has antireflection coating. Solar cell with resonant dielectric structure is shown in Fig. 9[69] and [70].