Citation
Jost, Norman and Antón Hernández, Ignacio and Nuñez Júdez, Rubén and Askins, Stephen and San José Gallego, Luis Javier and Vallerotto, Guido and Herrero Martin, Rebeca and Victoria Pérez, Marta and Domínguez Domínguez, César and Sala Pano, Gabriel
(2018).
From component to multi-junction solar cells for spectral monitoring.
In: "AIP publishing 2012: 14th International Conference on Concentrator Photovoltaics (CPV-14)", 16/04/2018 - 18/04/2018, Puertollano, España. ISBN 978-0-7354-1728-1. pp. 100002-1.
https://doi.org/10.1063/1.5053546.
Abstract
Concentrator photovoltaic usually embeds multi-junction solar cells, which exhibit high spectral sensitivity due to the internal series connection of the sub-cells. The use of so-called isotype or component cells with the same spectral response as the corresponding sub-cell, is widely applied for characterizing the spectral content of the impinging irradiance. These isotype sensors can be substituted by the multi-junction cells themselves, which are inherently spectrally tuned to any evolution of the multi-junction technology. To convert a multi-junction cell in a spectral sensor, it is necessary to add bias light within the spectral response of all but one of the sub-cells to saturate the corresponding junctions, so the nonsaturated limits the current under any specified impinging spectrum. This paper shows indoor and outdoor side-by-side comparison of the so-called pseudo isotypes, based on a triple-junction solar cell, and genuine isotypes. The conditions to ensure an accurate spectral response, particularly for the bottom pseudo-isotype, are presented and discussed.