DETERMINATION OF THE EXCITONIC RYDBERG ENERGY, THE EXCITON BOHR RADIUS FOR FREE EXCITON ACCORDING TO THE RATIO [Ga]?(([Ga]+[In] ) )AND BANDGAP ENERGY IN THE CHALCOPYRITE SOLAR CELL.
- Laboratory of Semiconductors and Solar Energy, Faculty of Science and Technology, Cheikh Anta DIOP University of Dakar, Senegal.
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In the paper, we studied the evolution of the excitonic Rydberg Energy, the exciton Bohr radius of free electron in the Cu(In1-xGax)Se2 chalcopyrite solar cells for values x= 0; 0.3 and 1([Ga]/ ([Ga] + [In])). The study shows that the excitonic Rydberg Energy (R*y) and Bohr radius (aB) move inversely. Indeed R*yincrease which x while aB decrease which x. Given the approach used, the effective mass of hole and electron of free excitons were also determined as the reduced masse. The evolution of the reduced mass may be related to the performance of the cell. Indeed the greatest reduced mass was obtained for x=0,3 corresponding to the rate where the efficiency is more higher and Cu-poor type.
[Soce Mouhamadou Mamour, Ehemba Alain Kassine, Diallo Demba, Wade Ibrahima and DiengMoustapha. (2016); DETERMINATION OF THE EXCITONIC RYDBERG ENERGY, THE EXCITON BOHR RADIUS FOR FREE EXCITON ACCORDING TO THE RATIO [Ga]?(([Ga]+[In] ) )AND BANDGAP ENERGY IN THE CHALCOPYRITE SOLAR CELL. Int. J. of Adv. Res. 4 (Sep). 1910-1917] (ISSN 2320-5407). www.journalijar.com
