Two-Terminal Tandem Solar Cells based on Perovskite and Transition Metal Dichalcogenides

Suman, Harishankar; Kumar, Arun

doi:10.48550/arxiv.2110.13780

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…A simulation study employing solar cell capacitance simulator (SCAPS 1D) tool indicated that a 2-T perovskite-TMD TSC configuration consisting of MAPbI 3 as the top-cell absorber and MoTe 2 as bottom cell absorber can yield a PCE of 35.3% under AM 1.5G solar radiation spectrum. [78] A TSC configuration with MAGeI 3 as the top-cell absorber material and MoTe 2 as the bottom cell absorber material when modeled with SCAPS 1D exhibited a PCE of 27.09% and 35.11% for the 2-T and 4-T heterojunction configurations, respectively. [69] A 2-T TSC formed of MAPbI 3 perovskite Cu 2 ZnSn(S,Se) 4 (kesterite) as absorber layers for two subcells provided a PCE of 20%.…”

Section: Tscsmentioning

confidence: 99%

Charting New Horizons: Unrivalled Efficiency and Stability in Perovskite Solar Cells

Jayan Koodali

2024

Physica Status Solidi (a)

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Perovskite solar cells (PSCs) with hybrid halide perovskite playing the role of photon‐harvesting materials have recently made strides in efficiency that have put them in the spotlight of solar cell research. Though PSCs are capable of exhibiting favorable photoconversion capabilities, they have not yet been commercialized as they are unstable in typical operating environments, especially for longer‐term usage. The mechanisms by which PSCs degrade, along with the methods to enhance their conversion efficiency, are studied, which, in turn, helps develop effective solutions to the degradation problem and increase the stability of the device architecture. A broad collection of theoretical and experimental analysis on stability of PSCs is available. In this article, a strategic review on the main challenges in attaining superior efficiency for PSCs along with the methods to overcome their efficiency limit is included providing emphasis to various degradation mechanisms of perovskite structures followed by a detailed examination of various factors impacting stability of PSCs as a whole. The performance and stability of devices can be improved by means of several methods including compositional engineering, interfacial engineering, device encapsulation, etc. The strategies that can be used to improve PSCs’ long‐term stability while ensuring cost‐effective device manufacture are covered here.

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Section: Tscsmentioning

confidence: 99%

Charting New Horizons: Unrivalled Efficiency and Stability in Perovskite Solar Cells

Jayan Koodali

2024

Physica Status Solidi (a)

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“…The recombination layer of the 2-T tandem device is introduced to establish the current matching condition between the MAGeI 3 and the TMD cells. The purpose of introducing a recombination layer in monolithic 2T tandem configurations is to recombine the carriers from the ETL and HTL by establishing the current Parameter FTO [23][24][25] IGZO [26] CuO [27] ZnO [28][29][30] ITO [23][24][25] MAGeI 3 [31][32][33] MoTe 2 [ 34,35] Cu 2 Te [34,35] Thickness matching condition between the MAGeI 3 and the TMD cells. [37] The recombination layer should be chosen such that the electrical losses especially the voltage loss should be minimum with the requirement of a suitable work function to collect the charge carriers generated.…”

Section: Impact Of the Thickness Of The Recombination Regionmentioning

confidence: 99%

High‐Efficiency Non‐Toxic 2‐Terminal and 4‐Terminal Perovskite‐Transition Metal Dichalcogenide Tandem Solar Cells

2022

Advcd Theory and Sims

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The modeling tool, SCAPS 1D, is applied to simulate a monolithic 2-T and mechanically stacked 4-T tandem solar device architectures with methyl ammonium germanium iodide (MAGeI 3 ) perovskite as the active layer of the top cell and transition metal dichalcogenide as the active layer of the bottom cell. To establish the requirement of current density matching between the two subcells of the monolithic 2-T configuration, a recombination layer composed of indium doped tin oxide (ITO) is also introduced. The thickness of the MAGeI 3 , TMD, and ITO are optimized to 950, 340, and 100 nm to achieve the current matching condition. The 2-T device configuration is able to establish a high fill factor (FF) and power conversion efficiency (PCE) of 86.19% and 27.09% after optimizing the physical parameters of the layers. The 4-T mechanically stacked tandem architecture is also simulated using the SCAPS 1D tool and a maximum possible PCE of 35.11% is achieved after optimizing the physical parameters of the light captivating layers, viz. thickness, the number density of defects and dopants, and the operating conditions viz. temperature, parasitic resistances, and work function of the materials employed as rear contacts.

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Impact of Internal Losses on the Efficiency of All Perovskite Tandem Solar Cells: Modeling and Analysis

Yadav,

Suman,

Yadav

et al. 2024

ACS Appl. Electron. Mater.

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Hybrid halide perovskites are the most promising alternatives for photovoltaic applications due to their superior optoelectronic properties. They can also be used in tandem geometry along with other state-of-the-art solar cell technologies such as Si and CIGS. Although the efficiency has reached over 31% for Si/perovskite tandem solar cells, the manufacturing complexity and increased fabrication cost prohibit commercialization. However, a tunable bandgap in perovskites can be utilized to fabricate all-perovskite tandem solar cells with device efficiency comparable to that of Si/perovskite tandem solar cells. In this article, we have investigated all-perovskite tandem solar cell efficiency theoretically and proposed the optimum bandgap for top and bottom cells. We have demonstrated that the calculated efficiency (∼32%) from the conventional series connection is overestimated, as we have observed a very high fill factor of ∼85%. This is due to the underestimated losses at the interfaces and individual cells. We have therefore simulated the current−voltage characteristics of the tandem solar cells using an equivalent circuit model. The presence of internal resistance in each cell plays a crucial role in determining the overall device performance. The fill factor decreases to ∼80%, while the short-circuit current density and open-circuit voltages are changed only marginally. Keeping the bottom cell's bandgap at 1.2 eV, we have achieved a maximum efficiency of 29.8% with the top cell bandgap of 1.75 eV. Further increase in the bandgap reduces the overall efficiency due to a decrease in short-circuit current density in the top cell.

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Two-Terminal Tandem Solar Cells based on Perovskite and Transition Metal Dichalcogenides

Cited by 3 publications

References 33 publications

Charting New Horizons: Unrivalled Efficiency and Stability in Perovskite Solar Cells

Charting New Horizons: Unrivalled Efficiency and Stability in Perovskite Solar Cells

High‐Efficiency Non‐Toxic 2‐Terminal and 4‐Terminal Perovskite‐Transition Metal Dichalcogenide Tandem Solar Cells

Impact of Internal Losses on the Efficiency of All Perovskite Tandem Solar Cells: Modeling and Analysis

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