Silicon Solar Cells & Antireflection Coating

Laser Annealing

Nanopaticle Stacks

Intruded gold nanoclusters

(INC) method

Silicon Solar Cells &

Antireflection Coating

Nanoparticles

Nanoimprint &

Nanofabrication

Organic Solar Cells

Carbon Nanotube

Optical Optimization of Solar Cells

The development of highly efficient solar cells is one solution to the problems of energy depletion and environmental destruction. The key issue when attempting to increase the external quantum efficiency of semiconductor-based solar cells is reducing interfacial reflection in the solar cell working-wavelength regime.

In addition, the reflectance decreased upon increasing the height of the pyramidal features. From simulations, we predicted that the reflectance would be reduced to less than 1% when the pyramidal features had a height of 500 nm; in contrast, cylindrical pillars having the same period and height would not reduce the reflectance to less than 10%.

From an analysis of the pyramidal structures using the three-dimensional FDTD method, we found that the reflection of light in the near field could also be reduced dramatically by a pyramidal structure having a height of 500 nm; this finding is similar to the result simulated by the rigorous coupled-wave analysis.