Abstract
To increase the performance of thin-film solar cells, solar spectrum splitting technique has been considered and studied. It was found from the simulation that the total efficiency of nearly 25% can be obtained at the splitting wavelength of 600 nm with top cell using higher band gap material. The experiment has been carried out to verify the simulation results. Up to now the total efficiency of about 18.7 % has been obtained using a-Si:H and Cu(In <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1-x</sub> ,Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> )Se <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> as the top and bottom cells, respectively, at the splitting wavelength of 614 nm which is similar to the simulation results.
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