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Intermediate band solar cells (IBSC) have been proposed in order to substantially increase the efficiency of solar cells. A novel intermediate band (IB) photovoltaic material of Ti-substituted CuGaS 2 (Ti-CGS 2 ) has been successfully fabricated via a facile solvothermal method. By part substitution of Ga atoms with Ti in the CGS 2 chalcopyrite crystal, a narrow partially filled...
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