Carrier transport in a quantum dot solar cell using semiclassical and quantum mechanical models

Semichaevsky, Andrey; Johnson, Harley T.

doi:10.1016/j.solmat.2012.09.030

Cited by 15 publications

(8 citation statements)

References 44 publications

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“…For IBSC device simulation, the transport equation is usually treated within the classical, i.e., drift-diffusion equation. Compared to the semi-classical and quantum methods, 18 the drift-diffusion method has an advantage that it can include whole cell structure which scale is $1 lm. This approach captures all the relevant recombination processes, both in the IB region but also elsewhere in the device structure, e.g., surface recombination.…”

Section: Development Of Ibsc Device Simulationmentioning

confidence: 99%

Intermediate band solar cells: Recent progress and future directions

Okada

Ekins-Daukes

Kita

et al. 2015

Applied Physics Reviews

336

235

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Extensive literature and publications on intermediate band solar cells (IBSCs) are reviewed. A detailed discussion is given on the thermodynamics of solar energy conversion in IBSCs, the device physics, and the carrier dynamics processes with a particular emphasis on the two-step inter-subband absorption/recombination processes that are of paramount importance in a successful implementation high-efficiency IBSC. The experimental solar cell performance is further discussed, which has been recently demonstrated by using highly mismatched alloys and high-density quantum dot arrays and superlattice. IBSCs having widely different structures, materials, and spectral responses are also covered, as is the optimization of device parameters to achieve maximum performance.

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Section: Development Of Ibsc Device Simulationmentioning

confidence: 99%

Intermediate band solar cells: Recent progress and future directions

Okada

Ekins-Daukes

Kita

et al. 2015

Applied Physics Reviews

336

235

View full text Add to dashboard Cite

show abstract

“…Semichaevsky and Johnson 75 have used a multiscale model for carrier transport to simulate a p-i-n solar cell that includes InAs/GaAs QDs. Their results suggest that, while contributing to the photocurrent due to absorption of photons with energies less than the bulk GaAs bandgap, stacked layers of InAs QD arrays with high in-plane densities used in a solar cell can inhibit the transport of photocarriers originating from the absorption of photons with energies above bulk GaAs bandgap.…”

Section: Quantum Dot Scattering Effect On Transportationmentioning

confidence: 99%

“…Their results suggest that, while contributing to the photocurrent due to absorption of photons with energies less than the bulk GaAs bandgap, stacked layers of InAs QD arrays with high in-plane densities used in a solar cell can inhibit the transport of photocarriers originating from the absorption of photons with energies above bulk GaAs bandgap. 75 Quantum scattering of carriers by the confinement potential, resulting in longer paths travelled by the carriers and thus an increased nonradiative (NR) recombination in the intrinsic region of the cell. 76 The reflected carriers also form an additional space charge that reduces the built-in field in the heterostructure region.…”

Section: Quantum Dot Scattering Effect On Transportationmentioning

confidence: 99%

Recent progress on quantum dot solar cells: a review

2016

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Abstract. Semiconductor quantum dots (QDs) have a potential to increase the power conversion efficiency in photovoltaic operation because of the enhancement of photoexcitation. Recent advances in self-assembled QD solar cells (QDSCs) and colloidal QDSCs are reviewed, with a focus on understanding carrier dynamics. For intermediate-band solar cells using selfassembled QDs, suppression of a reduction of open circuit voltage presents challenges for further efficiency improvement. This reduction mechanism is discussed based on recent reports. In QD sensitized cells and QD heterojunction cells using colloidal QDs well-controlled heterointerface and surface passivation are key issues for enhancement of photovoltaic performances. The improved performances of colloidal QDSCs are presented. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Quantum dot based devices for example, which are of interest for intermediate band solar cells [43], lend themselves to a modeling strategy where the optical and electronic properties of the quantum dot arrays are obtained by microscopic models. This has been done for example in [55], where a Monte Carlo model has been combined with a density matrix based microscopic description of the quantum dot absorber layer.…”

Section: Prospects Of Multiscale Simulations For Photovoltaicsmentioning

confidence: 99%

Multiscale Approaches for the Simulation of Optoelectronic Devices

Maur

2016

JGE

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Multiscale approaches for electronic device simulation have become a subject of high interest during the last decade. In this article we will give an overview on the current activities in the field. We will provide some practical examples from optoelectronics where multiscale simulations can be useful. Basic coupling schemes are discussed, and approaches for the combination of continuous models and models with atomistic resolution are described.

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Carrier transport in a quantum dot solar cell using semiclassical and quantum mechanical models

Cited by 15 publications

References 44 publications

Intermediate band solar cells: Recent progress and future directions

Intermediate band solar cells: Recent progress and future directions

Recent progress on quantum dot solar cells: a review

Multiscale Approaches for the Simulation of Optoelectronic Devices

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