Theoretical investigation of some parameters into the behavior of quantum dot solar cells

Nasr, A.; Aly, Abouelmaaty M.

doi:10.1088/1674-4926/35/12/124001

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…The intermediate band solar cells (IBSCs) have attracted great attention due to the possibility of exceeding the Shockley-Queisser (SQ) limit [1][2][3][4]. From the analysis by Luque et al [5,6], the IBSC's concept yields a maximum theoretical efficiency of 63.2%, surpassing the limit of 40.7% of single gap solar cells under maximum light concentration (the sun being assumed as a blackbody at 6000 K) [7].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of One-Intermediate Band Quantum Dot Solar Cell

Aly¹,

Nasr²

2014

International Journal of Photoenergy

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The intermediate bands (IBs) between the valence and conduction bands play an important role in solar cells. Because the smaller energy photons than the bandgap energy can be used to promote charge carriers transfer to the conduction band and thereby the total output current increases while maintaining a large open circuit voltage. In this paper, the influence of the new band on the power conversion efficiency for the structure of the quantum dots intermediate band solar cell (QDIBSC) is theoretically investigated and studied. The time-independent Schrödinger equation is used to determine the optimum width and location of the intermediate band. Accordingly, achievement of maximum efficiency by changing the width of quantum dots and barrier distances is studied. Theoretical determination of the power conversion efficiency under the two different ranges of QD width is presented. From the obtained results, the maximum power conversion efficiency is about 70.42% for simple cubic quantum dot crystal under full concentration light. It is strongly dependent on the width of quantum dots and barrier distances.

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Section: Introductionmentioning

confidence: 99%

Theoretical Study of One-Intermediate Band Quantum Dot Solar Cell

Aly¹,

Nasr²

2014

International Journal of Photoenergy

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“…The IBs allow for the absorption of low-energy photons that would otherwise be transmitted through the bulk SCs [44]. In the last decade, there has been an extensive effort to demonstrate the QDIBSCs with a central focus on III-V compound semiconductors [45][46][47][48][49][50][51][52][53]. QDs must be dense to achieve the sufficient photo-absorption in QD layers.…”

Section: Intermediate Band Solar Cellsmentioning

confidence: 99%

“…The reason for improvement of the efficiency in QDIBSCs is mainly that the IB formed among QDs increases absorption of longer wavelength region sunlight and reduces non-radiative combination. Recent studies have shown that efficiencies of QDIBSCs can be improved by using different compositions from III-V semiconductor materials [48][49][50][51][52][53]. It depends essentially on controlling each of the QDs size and the distances between them in the host materials.…”

Section: Intermediate Band Solar Cellsmentioning

confidence: 99%

Performance Evaluation of Nanostructured Solar Cells

Aly¹

2017

Nanostructured Materials - Fabrication to Applications

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Nanotechnology is making great contributions in various fields including harvesting solar energy through solar cells since nanostructured solar cells can provide high performance with lower fabrication costs. The transition from fossil fuel energy to renewable sustainable energy represents a major technological challenge for the world. The solar cells industry has grown rapidly in recent years due to strong interest in renewable energy in order to handle the problem of global climate change that is now believed to occur due to the use of fossil fuels. Cost is an important factor in the eventual success of any solar technology since inexpensive solar cells are needed to provide electricity especially for rural areas and for underdeveloped countries. Therefore, new developments in nanotechnology may open the door to the production of cheaper and more efficient solar cells by reducing the manufacturing costs of solar cells. This chapter covers a review of the progress that has been made to-date to enhance efficiencies of various nanostructures used in solar cells including utilizations of all the wavelengths present in of the solar spectrum.

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“…The direct radiation includes only the radiation from the solar and circumsolar radiation, as seen from the earth's surface. 1 Both the sun and the solar cell emit or absorb radiation with a distribution similar to that of a blackbody, therefore the equation for the flux of photons absorbed at the sun's surface ðf s Þ is [13][14][15] …”

Section: Traditional Solar Cellmentioning

confidence: 99%

Progress into power conversion efficiency for solar cells based on nanostructured and realistic spectra

Aly

2014

Journal of Renewable and Sustainable Energy

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To make the solar cell technology more competitive as a source of alternative energy, the study of how to improve its efficiency is essential. The detailed balance efficiency of traditional and one-intermediate band solar cell (one-IBSC) is analyzed by using realistic spectra at AM0 and AM1.5 under various light concentrations. Theoretically, the optimum location for one-IB is investigated to determine the maximum efficiency of one-IBSC. The quantum dot (QD) intermediate band solar cell is studied with the effect of some parameters for QD such as width size (QDW) and barrier thickness (BT) to determine the optimum location of one-IB. The main results conclude that the one-IBSC under AM0 spectrum has maximum balanced efficiencies reached to 45.70% and 63.56% for 1 Sun and maximum light concentration, respectively. While for AM1.5 spectrum these efficiencies are 49.35% and 67.60% with the same conditions of AM0 spectrum. The results also show that the maximum balanced efficiencies for one-IBSC nearly achieved when they are processed by QDs which have the main parameters, QDW and BT. V C 2014 AIP Publishing LLC. [http://dx.

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Theoretical investigation of some parameters into the behavior of quantum dot solar cells

Cited by 8 publications

References 30 publications

Theoretical Study of One-Intermediate Band Quantum Dot Solar Cell

Theoretical Study of One-Intermediate Band Quantum Dot Solar Cell

Performance Evaluation of Nanostructured Solar Cells

Progress into power conversion efficiency for solar cells based on nanostructured and realistic spectra

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