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Title: Electro-optical characterization of photovoltaic devices
Author: Busquets Masó, Martí
Director/Tutor: Hernández Márquez, Sergi
López Vidrier, Julià
Keywords: Energia fotovoltaica
Cèl·lules solars
Treballs de fi de grau
Photovoltaic power generation
Solar cells
Bachelor's theses
Issue Date: Jan-2015
Abstract: In this work, we adapted and improved a commercial system designed to measure the external quantum effiency (EQE) and the internal quantum efficiency (IQE) of commercial solar cells. With this purpose, we controlled and synchronized a monochromator and a semiconductor device analyser Agilent B1500A in order to perform different electro-optical measurements being able to measure very low current signals (~10-13 A). To verify that the system was working correctly, we used a Si solar cell whose ll factor, e ciency and spectral response are tabulated. Furthermore, we used this experimental setup to study a Si-NCs/SiO2 superlattice system deposited on a p-type silicon substrate. In this study, we characterized the I(V ) curve of the devices in dark and under white light illumination. We measured the spectral response and IQE of devices containing different NC sizes. IQE of ~14.2 - 20.5 were achieved in the 850-1000 nm wavelength range, and a shift of the IQE edge to higher energies was observed when decreasing the NC size, demostrating electro-optical quantum confinement.
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2015, Tutors: Sergi Hernández Márquez i Julià López Vidrier
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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