| In this project novel approaches regarding light management in thin-film silicon solar cells will be developed. Two types of thin-film based nano-structures, which have a potential for the manipulation of light propagation in opto-electronic devices, will be investigated, namely: (i) one-dimensional photonic-crystal-like structures and (ii) diffraction gratings. With the help of computer simulations the photonic-crystal-like structures using stacks of thin layers of a-Si:H, ZnO, SiNx, SiOx, and TiO2 will be designed for wavelength-selective high reflection or transmission in the visible and infra-red part of the solar spectrum. The designed structures will be fabricated and characterized in order to test their properties. Periodic diffraction gratings will be investigated which have a large potential for efficient light scattering into large angles. The effect of the height and period of periodically-structured gratings on scattering parameters such as haze and angular distribution function of scattered light will be studied. Both novel approaches for manipulating the light propagation will be implemented in solar cells. |