Minimizing Voltage Loss in Wide-Bandgap Perovskites for Tandem Solar Cells

Jaysankar, Manoj; Raul, Benedito A. L.; Bastos, J.P.A.; Burgess, Claire H.; Weijtens, Christ H. L.; Creatore, M.; Aernouts, Tom; Kuang, Yinghuan; Gehlhaar, Robert; Hadipour, Afshin; Poortmans, Jef

doi:10.1021/acsenergylett.8b02179

Cited by 154 publications

(145 citation statements)

References 39 publications

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“…Both samples show a conformal perovskite layer with well-defined crystals; the conformal coating mimics the texturing of the SHJ bottom cell. [25,26] In our case, we did not observe notable halide segregation during measurement for optimized samples. The volume seemed not to be a relevant parameter by itself.…”

Section: Wwwadvmattechnoldecontrasting

confidence: 38%

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Sansoni

Bastiani

Aydın

et al. 2020

Adv Materials Technologies

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are directly realized on top of a silicon bottom cell. Utilizing commercial crystalline silicon (c-Si) wafers brings a technological challenge since the perovskite device needs then to be fabricated on wafers that feature micron-scale randomly distributed pyramidal texture, an imperative characteristic for industrial c-Si solar cells for minimizing reflection losses. The PSCs owe their present prominence to their high PCE obtained via solutiondeposition techniques, which is arguably cheaper and simpler compared to conventional vacuum-based deposition for device fabrication. From this perspective, it is required to make solution-based processing of perovskite solar cells compatible with the use of micron-scale textured substrates. Among solution processing techniques, spin coating is widespread due to its process simplicity, ease of access, and because high-quality polycrystalline perovskite films can be obtained. However, this technique is not suitable for upscaling toward industrialization. Also, considering suggestions for large-scale applications in which spin coating is translated into blade coating, the application of this technique usually results in high material consumption, which is undesirable for a sustainable low-cost production. Moreover, spin coating the perovskite layer on textured silicon bottom cells represents a challenge by itself which, to date, reportedly led to poor coverage of the films resulting in low-performing tandems. [2,3] At present, 2T tandems are mainly realized following two approaches. In the first case, the c-Si bottom cell features a mirror-polished flat front surface to accommodate spin-coated perovskite films. However, this causes reflection losses in the device, which hamper the overall PCE and require additional antireflective coatings or foils. [4] In the second case, the perovskite is deposited on textured c-Si via hybrid conversion, where the perovskite precursors, lead(II) iodide (PbI 2 ) and cesium bromide (CsBr), are thermally evaporated on the c-Si bottom cell and then converted into perovskite by spin coating the organic ammonium salts (formamidinium iodide/bromide, FAI, and FABr, respectively). [2] In this case, the limiting factor is represented by fine-tuning the conversion process. Overall, both techniques strongly rely on spin coating as a deposition/ conversion method, which still represents a roadblock toward scaling-up for commercialization. Indeed, for successful PV An innovative sequential eco-friendly spray coating (SEF-SC) technique is developed to uniformly deposit metal halide perovskite films on macroscale textured surfaces, such as textured crystalline-silicon wafers. Contrasting with previous work on spray-coated perovskite solar cells, the method presented in this work completely avoids the use of toxic and dangerous solvents. Both MAPbI 3 and CsFAMAPbI 3−x Br x perovskite films deposited by SEF-SC show excellent optoelectronic properties and no phase segregation, even when synthesized in ambient conditions. Uniform perovskite coatings are obtained...

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Section: Wwwadvmattechnoldecontrasting

confidence: 38%

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Sansoni

Bastiani

Aydın

et al. 2020

Adv Materials Technologies

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“…Four‐terminal tandem devices with high efficiencies are typically fabricated on indium tin oxide (ITO)/glass substrates, with a multilayered electron‐transport layer (ETL), perovskite absorber layer, hole‐transport layer (HTL), buffer layer, and ITO top contact. The mechanically stacked four‐terminal tandems have currently achieved a PCE of 27.1% for perovskite–Si tandem based on a Cs 0.15 (CH 5 N 2 ) 0.85 Pb(I 0.71 Br 0.29 ) 3 top‐cell. However, three transparent electrodes are required in this case, which could lead to higher parasitic absorption and manufacturing cost, as well as lower practical efficiencies.…”

Section: Perovskite Tandem Progressmentioning

confidence: 99%

“…At the experimental level, perovskite–silicon tandem solar cells have reached efficiencies above 27% after persistive development for about 4 years. The tandem devices have accomplished a rapid advance, with efficiencies increasing from 13.7% to 25.5% for the monolithic two‐terminal, and efficiencies approaching 27.1% for four‐terminal tandem architectures. Very recently, Oxford PV have reported a new record efficiency of 28% on 1 cm 2 perovskite–silicon tandem cell, exceeding the 26.7% efficiency world record for a single‐junction silicon solar cell.…”

Section: Current Research Trends In Tandem Devicesmentioning

confidence: 99%

“…Figure shows the main perovskite‐based tandem experimental results published in the year 2015–2018. As can be seen, mechanically stacked perovskite–silicon tandems have currently achieved a high PCE of 27.1% based on Cs 0.15 (CH 5 N 2 ) 0.85 Pb(I 0.71 Br 0.29 ) 3 perovskite top subcell with a bandgap of 1.72 eV and crystalline silicon (c‐Si) bottom subcell, whereas monolithic perovskite–silicon tandems have approached 25.5% efficiency. The perovskite–perovskite tandems have achieved a four‐terminal efficiency of 23.1% by utilizing FA 0.8 Cs 0.2 Pb(I 0.7 Br 0.3 ) 3 ( E g = 1.75 eV) and (FASnI 3 ) 0.6 (MAPbI 3 ) 0.4 ( E g = 1.25 eV), with a monolithic tandem efficiency of 21.0% .…”

Section: Introductionmentioning

confidence: 99%

“…Efficiency record evolution of two‐terminal perovskite–silicon, perovskite–perovskite, and perovskite–CIGS tandem devices, as well as four‐terminal perovskite–silicon, perovskite–perovskite and perovskite–CIGS tandems, according to the online publication date.…”

Section: Introductionmentioning

confidence: 99%

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Two‐Terminal Perovskites Tandem Solar Cells: Recent Advances and Perspectives

Song

Chen

et al. 2019

Solar RRL

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Metal halide perovskite‐based solar cells have achieved rapidly increasing efficiencies of up to 23.7%. However, it is still far away from the Shockley–Quiesser limit of 33.16%. Tandem solar cells, consisting of two subcells with complementary absorption, are suggested as an alternative to beat this limit due to the fact that a maximum efficiency of 42% can be reached using two subcells with bandgaps of 1.9 eV/1.0 eV, opening up a great potential to develop perovskite‐based tandem solar cells. In this review, the current status of and recent advances in perovskite‐based tandem solar cells are highlighted, including perovskite–silicon, perovskite–perovskite, and perovskite–copper indium gallium selenide (CIGS) integrations. Different configurations, key issues regarding the photoelectric properties, present efficiency limitations, and material design are discussed. The critical role of perovskite bandgap optimization, interface engineering, and recombination layers are also analyzed to outline the roadmaps for future investigation. The current challenging issues and future perspectives are also provided. It is hoped that the findings will provide new perspectives for perovskite‐based tandem solar cells with an unprecedented performance and the opportunity for commercialization.

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Fabrication and Manufacturing Process of Solar Cell: Part II

Prabhansu

Kumar

2020

Green Energy

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Minimizing Voltage Loss in Wide-Bandgap Perovskites for Tandem Solar Cells

Cited by 154 publications

References 39 publications

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Two‐Terminal Perovskites Tandem Solar Cells: Recent Advances and Perspectives

Fabrication and Manufacturing Process of Solar Cell: Part II

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