The solar cells consist of semiconductor devices that use quantum, optical and transport processes of charge carriers, and have as fundamental source of energy the light coming from of the Sun. They are destined to the conversion of solar energy into electric energy. The maximum efficiency of the silicon based commercial solar cells is 30%, defined by the thermodynamical theoretical model of Shockley-Queisser. Our proposal is to optimize the efficiency of these devices by means of the engineering of intermediate band solar cell (IBSC). In this kind of structure, the proposal is to add an intermediate band to the optical transition between valence and the conduction bands of a p-i-n junction, either by doping it or through bound states of quantum well structures. We based our study on the latter. We used the Split Operator method for the numerical solution of the time-dependent Schrodinger equation described by the solar cell's potential. Thus, we obtained the eigenfunctions and eigenenergies of the system, and from this it was possible to obtain the absorption rate applying the Fermi's Golden-rule. As the computational tool we use the Julia programming language. With the results obtained from the optical and transport properties it was possible to start understanding the processes by which the efficiency of IBSC can be increased.
Resumo-Este artigo apresenta resultados da avaliação de desempenho do servidor web da Universidade Federal do Oeste do Pará que hospeda o sistema integrado de gerenciamento de atividades acadêmicas, o qual exige desempenho e disponibilidade, que consigam atender a demanda de requisições de maneira eficiente, principalmente em períodos que causam picos de acesso.
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