Homogenizing out-of-plane cation composition in perovskite solar cells

Nature, Journal Year: 2023, Volume and Issue: 624(7992), P. 557 - 563

Published: Nov. 1, 2023

Perovskite solar cells with the formula FA1-xCsxPbI3, where FA is formamidinium, provide an attractive option for integrating high efficiency, durable stability and compatibility scaled-up fabrication. Despite incorporation of Cs cations, which could potentially enable a perfect perovskite lattice1,2, compositional inhomogeneity caused by A-site cation segregation likely to be detrimental photovoltaic performance cells3,4. Here we visualized out-of-plane along vertical direction across films identified underlying reasons its potential impact devices. We devised strategy using 1-(phenylsulfonyl)pyrrole homogenize distribution composition in films. The resultant p-i-n devices yielded certified steady-state photon-to-electron conversion efficiency 25.2% stability.

Language: Английский

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Chlorobenzenesulfonic Potassium Salts as the Efficient Multifunctional Passivator for the Buried Interface in Regular Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(20)

Published: March 28, 2022

Abstract The interfacial properties for the buried junctions of perovskite solar cells (PSCs) play a crucial role further enhancement power conversion efficiency (PCE) and stability devices. Delicate manipulation interface such as defect density, energy alignment, film quality, etc., guarantees efficient extraction transport photogenerated carriers. Herein, chlorobenzenesulfonic potassium salts are presented novel multifunctional agent to modify tin oxide (SnO 2 )/perovskite regular PSCs. increasing number carbon‐chlorine bonds (CCl) in 2,4,5‐trichlorobenzenesulfonic (3Cl‐BSAK) exhibit interaction with uncoordinated Sn, effectively filling oxygen vacancies SnO surface. Importantly, synergistic effects functional group‐rich organic anions ion achieved reduced carrier recombination, hysteresis. A champion PCE 24.27% open‐circuit voltage ( V OC ) up 1.191 modified devices obtained. unencapsulated maintain 80% their initial after aging at 80 °C 800 h atmosphere 95% 100 d. With 3Cl‐BSAK decoration, high semitransparent PSC 12.83% an average visible light transmittance (AVT) over 27% is also

Language: Английский

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Oriented nucleation in formamidinium perovskite for photovoltaics

Nature, Journal Year: 2023, Volume and Issue: 620(7973), P. 323 - 327

Published: June 21, 2023

Language: Английский

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One-stone-for-two-birds strategy to attain beyond 25% perovskite solar cells

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 15, 2023

Even though the perovskite solar cell has been so popular for its skyrocketing power conversion efficiency, further development is still roadblocked by overall performance, in particular long-term stability, large-area fabrication and stable module efficiency. In essence, soft component ionic-electronic nature of metal halide perovskites usually chaperonage large number anion vacancy defects that act as recombination centers to decrease both photovoltaic efficiency operational stability. Herein, we report a one-stone-for-two-birds strategy which anion-fixation associated undercoordinated-Pb passivation are situ achieved during crystallization using single amidino-based ligand, namely 3-amidinopyridine, metal-halide overcome above challenges. The resultant devices attain high 25.3% (certified at 24.8%) with substantially improved Moreover, device without encapsulation retained 92% initial after 5000 h exposure ambient 95% >500 working maximum point under continuous light irradiation ambient. It expected this will benefit desires simplicity.

Language: Английский

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Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Nature Photonics, Journal Year: 2023, Volume and Issue: 17(6), P. 478 - 484

Published: April 10, 2023

Language: Английский

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Orientated crystallization of FA-based perovskite via hydrogen-bonded polymer network for efficient and stable solar cells

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 2, 2023

Incorporating mixed ion is a frequently used strategy to stabilize black-phase formamidinum lead iodide perovskite for high-efficiency solar cells. However, these devices commonly suffer from photoinduced phase segregation and humidity instability. Herein, we find that the underlying reason halide perovskites generally fail grow into homogenous high-crystalline film, due multiple pathways of crystal nucleation originating various intermediate phases in film-forming process. Therefore, design multifunctional fluorinated additive, which restrains complicated promotes orientated crystallization α-phase perovskite. Furthermore, additives in-situ polymerize during film formation form hydrogen-bonded network α-phase. Remarkably, polymerized endow strongly hydrophobic effect bare against liquid water 5 min. The unencapsulated achieve 24.10% efficiency maintain >95% initial 1000 h under continuous sunlight soaking 2000 at air ambient ~50% humid, respectively.

Language: Английский

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Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

Science, Journal Year: 2023, Volume and Issue: 380(6647), P. 823 - 829

Published: May 25, 2023

The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance p-i-n structure perovskite solar cells. We report that addition lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb 2+ ), resulting in a reduced amorphous region near passivated surface. minimodule an aperture area 26.9 square centimeters has power conversion efficiency (PCE) 21.8% (stabilized at 21.1%) is certified by National Renewable Energy Laboratory (NREL), which corresponds to minimal small-cell 24.6% 24.1%) throughout module area. Small-area cells large-area minimodules had light soaking stability 3010 2130 hours, respectively, loss 10% from initial value under 1-sun illumination open-circuit voltage conditions.

Language: Английский

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Efficient, stable formamidinium-cesium perovskite solar cells and minimodules enabled by crystallization regulation

Joule, Journal Year: 2022, Volume and Issue: 6(3), P. 676 - 689

Published: March 1, 2022

Language: Английский

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Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phases

Science, Journal Year: 2021, Volume and Issue: 374(6575), P. 1598 - 1605

Published: Dec. 23, 2021

Stable but not quite cubic The black, photoactive phase of formamidinium (FA) perovskites, which is usually stabilized by cation alloying to avoid the formation inactive hexagonal phases, assumed be cubic. High-resolution microscopy studies Doherty et al . using nanoscale probes revealed that these FA-rich phases are rather undergo slight tilting (by two degrees) octahedra. Black can have localized regions nucleate degradation. Surface-bound ethylenediaminetetraacetic acid tilted pure FA lead triiodide against environmental —PDS

Language: Английский

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Bifunctional hole-shuttle molecule for improved interfacial energy level alignment and defect passivation in perovskite solar cells

Nature Energy, Journal Year: 2023, Volume and Issue: 8(5), P. 515 - 525

Published: April 17, 2023

Abstract Perovskite solar cells have reached a power conversion efficiency over 25%, and the engineering of interface between perovskite hole transport layer (HTL) has been crucial to achieve high performance. Here we design bifunctional molecule CBz-PAI with carbazole-triphenylamine phenylammonium iodide units passivate defects at perovskite/HTL interface. Owing favourable energy level alignment perovskite, acts as shuttle HTL. This minimizes difference quasi-Fermi splitting or ‘internal’ V oc , external device thus reducing voltage losses. As result, incorporating reach stabilized 24.7% maintain 92.3% initial after 1,000 h under damp heat test (85 °C 85% relative humidity) 94.6% 1,100 maximum point-tracking conditions.

Language: Английский

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