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

Science, Год журнала: 2024, Номер 384(6692), С. 189 - 193

Опубликована: Апрель 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

Язык: Английский

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Reducing nonradiative recombination in perovskite solar cells with a porous insulator contact

Science, Год журнала: 2023, Номер 379(6633), С. 683 - 690

Опубликована: Фев. 16, 2023

Inserting an ultrathin low-conductivity interlayer between the absorber and transport layer has emerged as important strategy for reducing surface recombination in best perovskite solar cells. However, a challenge with this approach is trade-off open-circuit voltage (Voc) fill factor (FF). Here, we overcame by introducing thick (about 100 nanometers) insulator random nanoscale openings. We performed drift-diffusion simulations cells porous contact (PIC) realized it using solution process controlling growth mode of alumina nanoplates. Leveraging PIC approximately 25% reduced area, achieved efficiency up to 25.5% (certified steady-state 24.7%) p-i-n devices. The product Voc × FF was 87.9% Shockley-Queisser limit. velocity at p-type from 64.2 9.2 centimeters per second. bulk lifetime increased 1.2 6.0 microseconds because improvements crystallinity. improved wettability precursor allowed us demonstrate 23.3% efficient 1-square-centimeter cell. here its broad applicability different contacts compositions.

Язык: Английский

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Bimolecularly passivated interface enables efficient and stable inverted perovskite solar cells

Science, Год журнала: 2023, Номер 382(6672), С. 810 - 815

Опубликована: Ноя. 16, 2023

Compared with the n-i-p structure, inverted (p-i-n) perovskite solar cells (PSCs) promise increased operating stability, but these photovoltaic often exhibit lower power conversion efficiencies (PCEs) because of nonradiative recombination losses, particularly at perovskite/C60 interface. We passivated surface defects and enabled reflection minority carriers from interface into bulk using two types functional molecules. used sulfur-modified methylthio molecules to passivate suppress through strong coordination hydrogen bonding, along diammonium repel reduce contact-induced achieved field-effect passivation. This approach led a fivefold longer carrier lifetime one-third photoluminescence quantum yield loss certified quasi-steady-state PCE 25.1% for PSCs stable operation 65°C >2000 hours in ambient air. also fabricated monolithic all-perovskite tandem 28.1% PCE.

Язык: Английский

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Homogenized NiO _x nanoparticles for improved hole transport in inverted perovskite solar cells

Science, Год журнала: 2023, Номер 382(6677), С. 1399 - 1404

Опубликована: Ноя. 23, 2023

The power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs) is still lagging behind that conventional PSCs, in part because inefficient carrier transport and poor morphology hole layers (HTLs). We optimized self-assembly [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) onto nickel oxide (NiOx) nanoparticles as an HTL through treatment with hydrogen peroxide, which created a more uniform dispersion high conductivity attributed to the formation Ni3+ well surface hydroxyl groups for bonding. A 25.2% certified PCE mask size 0.074 square centimeters was obtained. This device maintained 85.4% initial after 1000 hours stabilized output operation under 1 sun light irradiation at about 50°C 85.1% 500 accelerated aging 85°C. obtained 21.0% minimodule aperture area 14.65 centimeters.

Язык: Английский

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Enhancing the efficiency and longevity of inverted perovskite solar cells with antimony-doped tin oxides

Nature Energy, Год журнала: 2024, Номер 9(3), С. 308 - 315

Опубликована: Янв. 12, 2024

Язык: Английский

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Highly Efficient Perovskite/Organic Tandem Solar Cells Enabled by Mixed‐Cation Surface Modulation

Advanced Materials, Год журнала: 2023, Номер 35(49)

Опубликована: Авг. 7, 2023

Perovskite/organic tandem solar cells (POTSCs) are gaining attention due to their easy fabrication, potential surpass the S-Q limit, and superior flexibility. However, low power conversion efficiencies (PCEs) of wide bandgap (Eg) perovskite (PVSCs) have hindered development. This work presents a novel effective mixed-cation passivation strategy (CE) passivate various types traps in wide-Eg perovskite. The complementary effect 4-trifluoro phenethylammonium (CF3 -PEA+ , denoted as CA+ ) ethylenediammonium (EDA2+ EA2+ reduces both electron/hole defect densities non-radiative recombination rate, resulting record open-circuit voltage (Voc PVSCs (1.35 V) high fill factor (FF) 83.29%. These improvements lead PCE 24.47% when applied fabricated POTSCs, highest date. Furthermore, unencapsulated POTSCs exhibit excellent photo thermal stability, retaining over 90% initial after maximum point (MPP) tracking or exposure 60 °C for 500 h. findings imply that synergic surface passivators is promising achieve high-efficiency stable corresponding POTSCs.

Язык: Английский

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Fundamental understanding of stability for halide perovskite photovoltaics: The importance of interfaces

Chem, Год журнала: 2023, Номер 10(1), С. 35 - 47

Опубликована: Сен. 29, 2023

Язык: Английский

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Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 1, 2024

Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness increasing work function for modified SAM layer, thereby providing flattened with favorable heterointerface perovskite. The resultant improvements crystallinity, minimized trap states, augmented hole extraction transfer capabilities propelled power conversion efficiencies (PCEs) beyond 25% PSCs p-i-n structure (certified 24.68%). OSCs CA achieve remarkable PCEs of 19.51% based on PM1:PTQ10:m-BTP-PhC6 photoactive system. Notably, universal also been achieved other two popular OSC systems. After 1000-hour maximal point tracking, encapsulated retain approximately 90% 80% their initial PCEs, respectively. introduces facile, rational, effective method to enhance performance SAMs, realizing efficiency breakthroughs both device structure, along improved operational stability. are essential high Here, authors develop molecule provide heterointerface, devices.

Язык: Английский

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Suppressing Oxidation at Perovskite–NiO_x Interface for Efficient and Stable Tin Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(17)

Опубликована: Ноя. 17, 2023

Inorganic nickel oxide (NiO

Язык: Английский

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Methods for Passivating Defects of Perovskite for Inverted Perovskite Solar Cells and Modules

Advanced Energy Materials, Год журнала: 2024, Номер 14(35)

Опубликована: Июнь 27, 2024

Abstract Inverted perovskite solar cells (PSCs) have attracted considerable attention due to their distinct advantages, including minimal hysteresis, cost‐effectiveness, and suitability for tandem applications. Nevertheless, the solution processing low formation energy of perovskites inevitably lead numerous defects formed at both bulk interfaces layer. These can act as non‐radiative recombination centers, significantly impeding carrier transport posing a substantial obstacle stability further enhancing power conversion efficiency (PCE). This review delves into detailed discussion nature origin characterization techniques employed defect identification. Furthermore, it systematically summarizes methods detection approaches passivating interface within film in inverted PSCs. Finally, this offers perspective on employing upscaling passivation engineering modules. It is hoped provides insights PSCs

Язык: Английский

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