Current-matching in two-terminal perovskite/silicon tandems employing wide-bandgap perovskites and varying light-management schemes

Manzoor, Salman; Häusele, Jakob; Bush, Kevin A.; Yu, Zhengshan J.; McGehee, Michael D.; Holman, Zachary C.

doi:10.1109/pvsc.2018.8547757

Cited by 5 publications

(8 citation statements)

References 16 publications

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“…Heat wend efficient PSC performance especially when a material absorbs photons of energies greater than its band gap. The wide band gap nature of perovskites helps to reduce thermal losses and increase the device efficiency 138 . Carriers with higher kinetic energies—“hot carriers”—get to the contacts before giving out their energy as heat.…”

Section: Current Status Of Perovskite Solar Cells Modellingmentioning

confidence: 99%

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An overview of the mathematical modelling of perovskite solar cells towards achieving highly efficient perovskite devices

et al. 2020

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Summary Researchers have at different times focused on designing perovskite solar cells (PSCs) that are flexible yet highly efficient, to enable the fabrication of portable photovoltaic solar cell (PVSC) devices in large quantities. This upcoming organometal trihalide perovskite has high tendencies of being a highly efficient, yet inexpensive solar cell. This is because the solution processing method is carried out at a reduced temperature and increased solar to electricity conversion efficiency (>25%) obtained within few innovative years. The nanostructured morphology and film quality is essential in obtaining functional power conversion efficiency. It could be a great task for the two characteristics to be present, especially within solutions where very good films are in contact with smooth morphological surfaces. A fast increase in the energy conversion efficiency of these PSCs incorporated with metal halides has been recorded. The next line of research should be to extend the existing models to 3D explicit models of the meso‐structured layer, to verify the 1D effective medium method discussed in the literature. Several models have been discussed to that effect. This review intensively discusses several perovskite models in a bid to understand PSCs. The challenges and future perspectives have also been highlighted.

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Section: Current Status Of Perovskite Solar Cells Modellingmentioning

confidence: 99%

“…The wide band gap nature of perovskites helps to reduce thermal losses and increase the device efficiency. 138 Carriers with higher kinetic energies-"hot carriers"-get to the contacts before giving out their energy as heat. In principle, efficiencies as high as 86% are achievable.…”

Section: Heat Generation and Thermal Modelling Of Perovskite Solar Cellsmentioning

confidence: 99%

An overview of the mathematical modelling of perovskite solar cells towards achieving highly efficient perovskite devices

et al. 2020

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“…The series connection of monolithic two‐terminal cells requires current matching between the cells, constraining the bandgaps that can be used. However, the tunability of perovskite band gaps can mitigate this issue 11 . To incorporate bifaciality in tandems, an extra TCE with high infrared (IR) transmittance and efficient light coupling is also needed at the rear 12 .…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] A promising combination of tandem subcells for widespread terrestrial applications involves using a large E g perovskite top cell and a lower E g SHJ bottom cell. Perovskites are particularly promising as the top cell in a tandem because of the large absorption coefficient, 9 large V OC potential, 10 and readily tuneable E g. 11 Of the available single-junction silicon cell architectures, the SHJ design is particularly advantageous in a tandem architecture. It has the highest efficiency potential, and the a-Si passivating layers are conductive, which avoids the requirements for localised interconnection.…”

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confidence: 99%

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Towards a graphene transparent conducting electrode for perovskite/silicon tandem solar cells

O'Sullivan,

Wright,

Niu

et al. 2023

Progress in Photovoltaics

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Indium‐based transparent conducting electrodes (TCEs) are a major limiting factor in perovskite/silicon tandem cell scalability, while also limiting maximum cell efficiencies. In this work, we propose a novel TCE based on electrostatically doped graphene monolayers to circumvent these challenges. The electrode is enabled by a thin film dielectric that is charged and interfaced to a graphene film, optimally exploiting electrostatic doping. The field effect mechanism allows the modulation of charge carriers in monolayer graphene as a function of charge concentration in the dielectric thin film. Electrostatic charge was deposited on SiO2 membranes, and graphene transferred onto them exhibited a reduction in sheet resistance because of the induced charge carriers. We show a reduction in sheet resistance of graphene by 60% in just 3 min of dielectric charging, without impacting the transmission of light through the film stack. Hall effect measurements indicated that the mobility of the films was not significantly degraded. The deposition of negative electrostatic charge reversed this effect, allowing for precise tunability of charge concentration from n‐ to p‐type. We develop a model to determine the required sheet resistance of a graphene TCE with 97% transmittance in a perovskite/silicon tandem cell. As the technique here reported does not impact transmittance, a graphene TCE with a sheet resistance below 50 Ω/□ could enable efficiencies up to 44%, presenting a promising alternative to indium‐based TCEs.

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Elucidating Charge Carrier Dynamics in Perovskite‐Based Tandem Solar Cells

et al. 2023

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Recently, multijunction tandem solar cells (TSCs) have presented high power conversion efficiency and revealed their immense potential in photovoltaic evolution. It is demonstrated that multiple light absorbers with various bandgap energies overcome the Shockley–Queisser limit of single‐junction solar cells by absorbing the wide‐range wavelength photons. Here, the main key challenges are reviewed, especially the charge carrier dynamics in perovskite‐based 2‐terminal (2‐T) TSCs in terms of current matching, and how to manage these issues from a vantage point of characterization. To do this, the effect of recombination layers, optical and fabrication hurdles, and the impact of wide bandgap perovskite solar cells are discussed extensively. Afterward, this review focuses on various optoelectronics, spectroscopic, and theoretical (optical simulation) characterizations to figure out those issues, especially current‐matching issues faced by the photovoltaic society. This review comprehensively provides deep insights into the relationship between the current‐matching problems and the photovoltaic performance of TSCs through a variety of perspectives. Consequently, it is believed that this review is essential to address the main problems of 2‐T TSCs, and the suggestions to elucidate the charge carrier dynamics and its characterization may pave the way to overcome such obstacles to further improve the development of 2‐T TSCs in relation to the current‐matching problems.

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Current-matching in two-terminal perovskite/silicon tandems employing wide-bandgap perovskites and varying light-management schemes

Cited by 5 publications

References 16 publications

An overview of the mathematical modelling of perovskite solar cells towards achieving highly efficient perovskite devices

An overview of the mathematical modelling of perovskite solar cells towards achieving highly efficient perovskite devices

Towards a graphene transparent conducting electrode for perovskite/silicon tandem solar cells

Elucidating Charge Carrier Dynamics in Perovskite‐Based Tandem Solar Cells

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