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The feasibility of high-efficiency InAs/GaAs quantum dot intermediate band solar cells

Mellor, A. ; Luque, A. ; Tobías, I. ; Martí, A.

Solar energy materials and solar cells, 2014-11, Vol.130, p.225-233 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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Título:
The feasibility of high-efficiency InAs/GaAs quantum dot intermediate band solar cells
Autor: Mellor, A. ; Luque, A. ; Tobías, I. ; Martí, A.
Assuntos: Applied sciences ; Direct energy conversion and energy accumulation ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Energy ; Exact sciences and technology ; Gallium arsenide ; Gallium arsenides ; High efficiency ; Indium arsenides ; Intermediate band ; Light trapping ; Natural energy ; Photoelectric conversion ; Photovoltaic cells ; Photovoltaic conversion ; Quantum dot ; Quantum dots ; Solar cells ; Solar cells. Photoelectrochemical cells ; Solar energy ; Trapping
É parte de: Solar energy materials and solar cells, 2014-11, Vol.130, p.225-233
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: In recent years, all the operating principles of intermediate band behaviour have been demonstrated in InAs/GaAs quantum dot (QD) solar cells. Having passed this hurdle, a new stage of research is underway, whose goal is to deliver QD solar cells with efficiencies above those of state-of-the-art single-gap devices. In this work, we demonstrate that this is possible, using the present InAs/GaAs QD system, if the QDs are made to be radiatively dominated, and if absorption enhancements are achieved by a combination of increasing the number of QDs and light trapping. A quantitative prediction is also made of the absorption enhancements required, suggesting that a 30 fold increase in the number of QDs and a light trapping enhancement of 10 are sufficient. Finally, insight is given into the relative merits of absorption enhancement via increasing QD numbers and via light trapping. •Future research on quantum dot (QD) solar cells must deliver high efficiency devices.•The feasibility of this is assessed using a realistic detailed balance study.•High efficiencies require more QDs and optical light trapping.•With no light trapping, 1000 more QD are required compared to present cells.•With a 10 fold optical absorption enhancement, 30 times more QD are required.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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The feasibility of high-efficiency InAs/GaAs quantum dot intermediate band solar cells

Mellor, A. ; Luque, A. ; Tobías, I. ; Martí, A.

Amsterdam: Elsevier B.V

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