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Marseille, France

Berbezier A.,Institute Materials | Michelini F.,Institute Materials
Thin Solid Films | Year: 2013

To improve efficiency, third generation solar cells shall include quantum nanostructures. We developed numerical calculations within the Keldysh formalism to investigate the photovoltaic properties of a quantum wire-dot-wire concept cell. A photocurrent is produced at zero bias voltage for a very narrow range of photon energy. We moreover explain how the spectral current densities show a single peak response close to the resonance while a double peak one far from it. © 2013 Elsevier B.V.


Berbezier A.,Institute Materials | Michelini F.,Institute Materials
Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD | Year: 2012

To investigate the photovoltaic properties of quantum dot connected to quantum wire reservoirs we rely on numerical calculations using the non-equilibrium Green function formalism. We examine impacts of the hopping parameter that controls the dot-wire contact for a monochromatic light resonant with the isolated dot gap. Global current and power increase when the hopping decreases, in particular the short-circuit current and the open-circuit voltage. © 2012 IEEE.

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