Optimizing efficiency of InGaP/GaAs dual-junction solar cells with double tunnel junction and bottom back surface field layers

Kharchich, Fatima Zahra; Khamlichi, Abdellatif

doi:10.1016/j.ijleo.2022.170196

Cited by 6 publications

(5 citation statements)

References 28 publications

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“…The BSF layer plays an important role in controlling the recombination rate of charge carriers in single and multijunction solar cells. Its thickness must be optimized to include the BSF layer [120,149]. A wide band gap BSF layer is found to be more effective at confining minority charge carriers than highly doped BSF layers [42].…”

Section: Window and Back Surface Field (Bsf) Layersmentioning

confidence: 99%

“…The maximum efficiency obtained is 19.62%, with an Indium content of 30% and 56%, a thickness of 0.01 μm and 0.01 μm, and a doping concentration of 1 × 10 18 cm −3 and 5 × 10 19 cm −3 for window layer and BSF layers respectively. Kharchich et al (2023) proposed a new numerical approach for optimizing an InGaP/GaAs double junction solar cell made up of InAlGaP double BSF layers [120]. They performed initial simulations with ATLAS software and then post-processed the data to optimize each layer of the device, either using a quadratic surface model or an artificial neural network model at each optimization stage.…”

Section: Window and Back Surface Field (Bsf) Layersmentioning

confidence: 99%

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Advancing efficiency: comprehensive strategies for minimizing optical and electrical losses in group III-V compound tandem solar cells for future photovoltaic technology

Soley,

Verma,

Khatri

et al. 2024

Eng. Res. Express

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Global energy consumption is rising, and fossil resources are dwindling, driving demand for clean, affordable energy. Solar power is the most promising alternative energy source and can meet future energy needs. In terrestrial photovoltaics, low-cost Silicon solar cells dominate. However, as the single junction silicon solar cells are approaching their highest achievable efficiency of 30%, high-efficiency, “group III-V Compound” semiconductor tandem solar cells are being considered as an alternative energy source. The absorption capacity of the wide range of solar radiation photons enables them to achieve high efficiency. However, further improvement in efficiency is constrained due to the various loss mechanisms that occur during the physical process of converting light to electrical energy in “group III-V compound” tandem solar cells. Extensive research is being conducted to develop solution approaches to minimize the loss mechanisms in order to improve efficiency. Although many published review articles have studied the research progress of “group III-V compound” solar cells based on fabrication techniques, applications, status, and challenges, there is no article mentioning a comprehensive and comparative study of strategies employed by researchers to enhance efficiency in “group III-V compounds” tandem solar cells considering loss mechanisms. The present study focuses on discussing the fundamental losses in “group III-V compounds” tandem solar cells and various strategies employed by researchers to reduce optical and electrical losses to improve the efficiency of these devices so that they may be employed in terrestrial applications.

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Section: Window and Back Surface Field (Bsf) Layersmentioning

confidence: 99%

Section: Window and Back Surface Field (Bsf) Layersmentioning

confidence: 99%

Advancing efficiency: comprehensive strategies for minimizing optical and electrical losses in group III-V compound tandem solar cells for future photovoltaic technology

Soley,

Verma,

Khatri

et al. 2024

Eng. Res. Express

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“…The studied solar cell is made of a GaAs top cell connected through a InGaP/InGaP tunnel junction to a GaSb bottom cell. [19][20]. The numerical simulation is carried out under AM1.5 illumination and 300K.…”

Section: Simulation Of Solar Cells Under Silvaco Atlas Software 21 Ar...mentioning

confidence: 99%

“…Table 1 gives the parameters used in simulations performed in this work. They were taken from existing literature [20,23].…”

Section: Simulation Of Solar Cells Under Silvaco Atlas Software 21 Ar...mentioning

confidence: 99%

Simulation and performance optimization of GaAs/GaSb tandem solar cell

Kharchich

Khamlichi

2022

MATEC Web Conf.

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Multi-junction solar cells provide the highest efficiencies. Intense research activity is being held with the aim to increase the actual performance reached by these cells. Harvesting most of the solar spectrum and finding the optimum design variables in terms of structural parameters and carrier concentrations are the main topics being investigated by solar developers. The GaAs/GaSb based dualjunction solar cell was found suitable for the best absorption of solar spectrum. In this work, an optimization approach was applied to fix the optimal parameters of the top base layer of this structure that provide the maximum efficiency. To achieve this, a series of numerical simulations were carried out by means of Silvaco ATLAS software under standard AM1.5G spectrum where thicknesses and doping levels of the top base layer were varied. The obtained optimal structure yields a power conversion efficiency of 41.65% with open circuit voltage of 1.78 V, short circuit current of 35.72 mA / cm2 and fill factor of 90.16%. The performance of the GaAs/GaSb dual-junction solar cell was further improved by using sunlight concentration. A conversion power efficiency of 45.78% at 60sun light concentration was attained. It was found also that above this level of concentration ratio the detriment effect of shunt resistance dominates.

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“…However, variability of the performance is likely to be almost not affected by half of them. This was stated based on first guess simulations and also by means of a previous work[25]. So, the set of design variables included in the optimization task of the tandem solar cell the following…”

mentioning

confidence: 99%

Design and optimisation of two-terminal InGaP/Si tandem solar cell through numerical simulation

Kharchich,

Khamlichi

2023

Preprint

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The two-terminal III-V/Si double junction solar cells were recognized to achieve comparable performance with lower cost of fabrication than the III-V/III-V tandems. They have already yielded an efficiency of 35.9% of power conversion. However, this performance still remains below the theoretically limit which is stated to be beyond 43%. Considering monolithic InGaP/Si based tandem designed with double back surface field layers, this work dealt with optimization of efficiency as a function of the structure layers thicknesses and dopings. Numerical simulations were conducted for this purpose by using Silvaco/ATLAS TCAD software and were sorted according to a multi-step optimization procedure. The obtained optimum tandem InGaP/Si solar cell reached an unprecedented power conversion efficiency of 38.16% under 1.5G spectrum. Furthermore, a realistic analysis of performance of this structure was performed under different temperatures and illumination levels. The effect of InGaP band gap variation on efficiency was also investigated.

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Optimizing efficiency of InGaP/GaAs dual-junction solar cells with double tunnel junction and bottom back surface field layers

Cited by 6 publications

References 28 publications

Advancing efficiency: comprehensive strategies for minimizing optical and electrical losses in group III-V compound tandem solar cells for future photovoltaic technology

Advancing efficiency: comprehensive strategies for minimizing optical and electrical losses in group III-V compound tandem solar cells for future photovoltaic technology

Simulation and performance optimization of GaAs/GaSb tandem solar cell

Design and optimisation of two-terminal InGaP/Si tandem solar cell through numerical simulation

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