DataVXJournal of Photonics for EnergyPaper
journal article·2015-06-05Open access

Quantitative optical measurement of chemical potentials in intermediate band solar cells

Pierre Rale, Amaury Delamarre, Gilbert El-Hajje, Ryo Tamaki, Kentaroh Watanabe, Yasushi Shoji, Yoshitaka Okada, Masakazu Sugiyama, Laurent Lombez, Jean-François Guillemoles

Journal of Photonics for Energy· Volume 5· Issue 1
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Source abstract

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 2 μm 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.
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloys

OpenAlex topics: Semiconductor Quantum Structures and Devices · Quantum Dots Synthesis And Properties · Advanced Semiconductor Detectors and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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

CNRS, Institut de Recherche et Développement sur l’Energie Photovoltaïque, EDF R&D 6 quai Watier, Chatou 78401, FrancebThe University of Tokyo, NextPV, CNRS-RCAST Joint Lab, Tokyo, Meguro-ku 153-8904, Japan

The University of Tokyo, NextPV, CNRS-RCAST Joint Lab, Tokyo, Meguro-ku 153-8904, JapancThe University of Tokyo, Research Center for Advanced Science and Technology, Tokyo, Meguro-ku 153-8904, Japan

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

References

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