Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction

Science, Journal Year: 2020, Volume and Issue: 370(6522), P. 1300 - 1309

Published: Dec. 10, 2020

Tandem solar cells that pair silicon with a metal halide perovskite are promising option for surpassing the single-cell efficiency limit. We report monolithic perovskite/silicon tandem certified power conversion of 29.15%. The absorber, bandgap 1.68 electron volts, remained phase-stable under illumination through combination fast hole extraction and minimized nonradiative recombination at hole-selective interface. These features were made possible by self-assembled, methyl-substituted carbazole monolayer as layer in cell. accelerated was linked to low ideality factor 1.26 single-junction fill factors up 84%, while enabling open-circuit voltage high 1.92 volts. In air, without encapsulation, retained 95% its initial after 300 hours operation.

Language: Английский

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Controlled growth of perovskite layers with volatile alkylammonium chlorides

Nature, Journal Year: 2023, Volume and Issue: 616(7958), P. 724 - 730

Published: Feb. 16, 2023

Language: Английский

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Minimizing non-radiative recombination losses in perovskite solar cells

Nature Reviews Materials, Journal Year: 2019, Volume and Issue: 5(1), P. 44 - 60

Published: Nov. 19, 2019

Language: Английский

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Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems

Science, Journal Year: 2020, Volume and Issue: 367(6482), P. 1097 - 1104

Published: March 5, 2020

Tuning band gaps with three halides Tandem solar cells can boost cell efficiency by using two active layers to absorb the spectrum more completely, provided that are current-matched. Inorganic-organic perovskites tuned appropriate wide gap (∼1.7 electron volts) as top contained iodine and bromine or chlorine have short carrier diffusion lengths undergo photo-induced phase segregation. Xu et al. now report a method for incorporating chloride allows fabrication of stable triple-halide 1.67 volts. Two-terminal tandem silicon made this material had power conversion 27%. Science , issue p. 1097

Language: Английский

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Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 12(11), P. 3356 - 3369

Published: Jan. 1, 2019

We introduce new hole-selective contacts for next-generation perovskite photovoltaics and point to design paths molecular engineering of perfect interfaces.

Language: Английский

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The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 12(9), P. 2778 - 2788

Published: Jan. 1, 2019

Charge transport layers (CTLs) are key components of diffusion controlled perovskite solar cells, however, they can induce additional non-radiative recombination pathways which limit the open circuit voltage (V_OC) cell. In order to realize full thermodynamic potential absorber, both electron and hole layer (ETL/HTL) need be as selective possible. By measuring quasi-Fermi level splitting (QFLS) perovskite/CTL heterojunctions, we quantify interfacial current for a wide range commonly used CTLs, including various hole-transporting polymers, spiro-OMeTAD, metal oxides fullerenes. We find that all studied CTLs V_OC by inducing an is significantly larger than loss in neat least-selective interface sets upper device. The results also show equals internal QFLS absorber (pin, nip) cells with power conversion efficiencies up 21.4%. However, case less substantially lower indicates losses at contacts and/or interfaces. findings corroborated rigorous device simulations outline several important considerations maximize V_OC. This work shows real challenge supress on their way radiative lies suppression carrier

Language: Английский

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Minimizing buried interfacial defects for efficient inverted perovskite solar cells

Science, Journal Year: 2023, Volume and Issue: 380(6643), P. 404 - 409

Published: April 27, 2023

Controlling the perovskite morphology and defects at buried perovskite-substrate interface is challenging for inverted solar cells. In this work, we report an amphiphilic molecular hole transporter, (2-(4-(bis(4-methoxyphenyl)amino)phenyl)-1-cyanovinyl)phosphonic acid, that features a multifunctional cyanovinyl phosphonic acid group forms superwetting underlayer deposition, which enables high-quality films with minimized interface. The resulting film has photoluminescence quantum yield of 17% Shockley-Read-Hall lifetime nearly 7 microseconds achieved certified power conversion efficiency (PCE) 25.4% open-circuit voltage 1.21 volts fill factor 84.7%. addition, 1-square centimeter cells 10-square minimodules show PCEs 23.4 22.0%, respectively. Encapsulated modules exhibited high stability under both operational damp heat test conditions.

Language: Английский

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Nonradiative Recombination in Perovskite Solar Cells: The Role of Interfaces

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(52)

Published: Oct. 21, 2019

Abstract Perovskite solar cells combine high carrier mobilities with long lifetimes and radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their V OC to values well below the Shockley–Queisser limit. Here, recent advances in understanding perovskite picoseconds steady state are presented, an emphasis on interfaces between absorber charge transport layers. Quantification of quasi‐Fermi level splitting films without attached layers allows identify origin recombination, explain operational devices. These measurements prove that state‐of‐the‐art cells, at is more important than processes bulk or grain boundaries. Optical pump‐probe techniques give complementary access interfacial pathways provide quantitative information transfer rates velocities. Promising optimization strategies also highlighted, particular view role energy alignment importance surface passivation. Recent record low losses presented where effectively overcome—paving way thermodynamic efficiency

Language: Английский

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Improved charge extraction in inverted perovskite solar cells with dual-site-binding ligands

Science, Journal Year: 2024, Volume and Issue: 384(6692), P. 189 - 193

Published: April 11, 2024

Inverted (pin) perovskite solar cells (PSCs) afford improved operating stability in comparison to their nip counterparts but have lagged power conversion efficiency (PCE). The energetic losses responsible for this PCE deficit pin PSCs occur primarily at the interfaces between and charge-transport layers. Additive surface treatments that use passivating ligands usually bind a single active binding site: This dense packing of electrically resistive passivants perpendicular may limit fill factor PSCs. We identified two neighboring lead(II) ion (Pb

Language: Английский

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Intact 2D/3D halide junction perovskite solar cells via solid-phase in-plane growth

Nature Energy, Journal Year: 2021, Volume and Issue: 6(1), P. 63 - 71

Published: Jan. 4, 2021

Language: Английский

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