Photovoltaic Materials, Devices, and Technologies

Quantitative optical measurement of chemical potentials in intermediate band solar cells

[+] Author Affiliations
Pierre Rale, Gilbert El-Hajje, Laurent Lombez

CNRS, Institut de Recherche et Développement sur l’Energie Photovoltaïque, EDF R&D 6 quai Watier, Chatou 78401, France

Amaury Delamarre, Jean-François Guillemoles

CNRS, Institut de Recherche et Développement sur l’Energie Photovoltaïque, EDF R&D 6 quai Watier, Chatou 78401, France

The University of Tokyo, NextPV, CNRS-RCAST Joint Lab, Tokyo, Meguro-ku 153-8904, Japan

Ryo Tamaki, Kentaroh Watanabe, Yoshitaka Okada, Masakazu Sugiyama

The University of Tokyo, NextPV, CNRS-RCAST Joint Lab, Tokyo, Meguro-ku 153-8904, Japan

The University of Tokyo, Research Center for Advanced Science and Technology, Tokyo, Meguro-ku 153-8904, Japan

Yasushi Shoji

The University of Tokyo, Research Center for Advanced Science and Technology, Tokyo, Meguro-ku 153-8904, Japan

J. Photon. Energy. 5(1), 053092 (Jun 05, 2015). doi:10.1117/1.JPE.5.053092
History: Received September 22, 2014; Accepted May 4, 2015
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Abstract.  Having shown some demonstration of two photon absorption and multiband emission processes in quantum dots (QD), multiquantum wells (MQW), and highly mismatched alloys, intermediate band solar cells are currently the subject of numerous studies. To better understand the underlying mechanisms, our objective is to experimentally probe the multiband operation of this device. We used photoluminescence recorded with a calibrated hyperspectral imager which provides spectrally resolved images with a spatial resolution of 2μm and spectral resolution of 2 nm on proof of concept QD and MQW solar cells samples. Device emission can be described with the generalized Planck’s law from which the quasi-Fermi level splitting of the three bands can be determined. The advantage of the technique is that it can be used to investigate the intermediate band material without the need to make contacts or a full device structure. We also discuss the usefulness of a dual-beam method.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Pierre Rale ; Amaury Delamarre ; Gilbert El-Hajje ; Ryo Tamaki ; Kentaroh Watanabe, et al.
"Quantitative optical measurement of chemical potentials in intermediate band solar cells", J. Photon. Energy. 5(1), 053092 (Jun 05, 2015). ; http://dx.doi.org/10.1117/1.JPE.5.053092


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