Photocurrent spectroscopy applied to thin film solar cells based on hydrogenated amorphous silicon (a-Si:H)
DOI:
https://doi.org/10.21754/tecnia.v15i2.419Keywords:
thin films, amorphous silicon, photocurrent measurements, solar cellsAbstract
Using photocurrent spectroscopy, we report measurements of the photo responde below the optical gap in hydrogenated amorphous silicon (a-Si:H). The a-Si:H films were grown in a non conventional DC plasma assited discharge chamber. The measurements suggest that the density of states of this material is not very different than conventional intrinsic a-Si:H (device-quality) and not so extended as usually taken. The positions of the corresponding photovoltaic transition energies are determined and agree very well with known data obtained by other methods.
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