Tailoring passivators for highly efficient and stable perovskite solar cells

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(9), P. 632 - 652

Published: July 18, 2023

Language: Английский

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Near‐Stoichiometric and Homogenized Perovskite Films for Solar Cells with Minimized Performance Variation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(17)

Published: Feb. 22, 2023

Mixed-cation, small band-gap perovskites via rationally alloying formamidinium (FA) and methylammonium (MA) together have been widely employed for blade-coated perovskite solar cells with satisfied efficiencies. One of the stringent challenges lies in difficult control nucleation crystallization kinetics mixed ingredients. Herein, a pre-seeding strategy by mixing FAPbI3 solution pre-synthesized MAPbI3 microcrystals has developed to smartly decouple process. As result, time window initialized greatly extended 3 folds (i.e. from 5 s 20 s), which enables formation uniform homogeneous alloyed-FAMA films designated stoichiometric ratios. The resultant achieved champion efficiency 24.31 % accompanied outstanding reproducibility more than 87 devices showing efficiencies higher 23 %.

Language: Английский

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Differential perovskite hemispherical photodetector for intelligent imaging and location tracking

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 17, 2024

Abstract Advanced photodetectors with intelligent functions are expected to take an important role in future technology. However, completing complex detection tasks within a limited number of pixels is still challenging. Here, we report differential perovskite hemispherical photodetector serving as smart locator for imaging and location tracking. The high external quantum efficiency (~1000%) low noise (10 −13 A Hz −0.5 ) enable stable large variations signal response. Analysing the light response only 8 computer algorithm can realize capability colorful computational spectral resolution 4.7 nm low-cost lensless device geometry. Through machine learning mimic current under different applied biases, one more dimensional information be recorded, dynamically tracking running trajectory object three-dimensional space or two-dimensional plane color classification function.

Language: Английский

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A Novel Organic Phosphonate Additive Induced Stable and Efficient Perovskite Solar Cells with Efficiency over 24% Enabled by Synergetic Crystallization Promotion and Defect Passivation

Nano Letters, Journal Year: 2023, Volume and Issue: 23(19), P. 8850 - 8859

Published: Sept. 25, 2023

Defect passivation is crucial to enhancing the performance of perovskite solar cells (PSCs). In this study, we successfully synthesized a novel organic compound named DPPO, which consists double phosphonate group. Subsequently, incorporated DPPO into solution. The presence P═O group interacting with undercoordinated Pb2+ yielded film superior crystallinity, greater crystal orientation, and smoother surface. Additionally, addition can passivate defect states enhance upper layer energy level alignment, will improve carrier extraction prevent nonradiative recombination. Consequently, an impressive champion efficiency 24.24% was achieved minimized hysteresis. Furthermore, DPPO-modified PSCs exhibit enhanced durability when exposed ambient conditions, maintaining 95% initial for 1920 h at average relative humidity (RH) 30%.

Language: Английский

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Halogenated Hole‐Transport Molecules with Enhanced Isotropic Coordination Capability Enable Improved Interface and Light Stability of Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(14)

Published: Feb. 17, 2023

Abstract Interfacial defects are one of the main origins hysteresis effect and limit efficiency light stability perovskite solar cells (PSCs). Herein, authors propose to grant hole‐transport materials’ (HTMs) improved isotropic coordination defect passivation through simple halogenation, enabling a robust perovskite/hole‐transport layer interface while avoiding use an external layer. First‐principles simulations experimental results show that halogenated HTMs offer more sites for Pb 2+ ions than halogen‐free ones, thus providing enhanced passivating ability regardless their molecular orientation at surface films. Consequently, PSCs based on chlorinated spiro[fluorene‐9,9′‐xanthene]‐based HTM suppressed nonradiative recombination, delivering remarkable open‐circuit voltage ( V OC ) enhancement (from 1.07 1.14 V) minimal index as low 0.07%. The corresponding also much stability, retaining 81% initial after 1000 h continuous illumination maximum power point. This work demonstrates solid capability with is critical forming improving PSCs’ stability.

Language: Английский

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Buried Interface Passivation: A Key Strategy to Breakthrough the Efficiency of Perovskite Photovoltaics

Small, Journal Year: 2023, Volume and Issue: 19(38)

Published: May 17, 2023

Abstract Owing to the merits of low cost and high power conversion efficiency (PCE), perovskite solar cells (PSCs) have become best candidate replace commonly used silicon cells. However, PSCs been slow enter market for a number reasons, including poor stability, toxicity, rigorous preparation process. Passivation strategies surface passivation bulk successfully applied improve device performance PSCs. The defects at buried interface, which is regarded as key strategy breakthrough stability in future, ongoing with challenge. Herein, detail recent interface introduced from three aspects: layer, interlayer, transport layer. effect clearly demonstrated through categories salts, organics, 2D materials. In addition, layer classified into electron (ETL) hole (HTL). These classifications can help clear understanding substances generate passivating guide continuous promotion follow‐up work.

Language: Английский

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Cross-linking polymerization boosts the performance of perovskite solar cells: from material design to performance regulation

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(10), P. 4251 - 4279

Published: Jan. 1, 2023

This paper reviews the performance modulation of perovskite solar cells by cross-linking polymerization with different molecular structures from points grain boundaries, lattice interior, and charge transport layers.

Language: Английский

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Surface reconstruction of wide-bandgap perovskites enables efficient perovskite/silicon tandem solar cells

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 4, 2024

Wide-bandgap perovskite solar cells (WBG-PSCs) are critical for developing perovskite/silicon tandem cells. The defect-rich surface of WBG-PSCs will lead to severe interfacial carrier loss and phase segregation, deteriorating the device's performance. Herein, we develop a reconstruction method by removing crystal nano-polishing then passivating newly exposed high-crystallinity surface. This can refresh perovskite/electron-transporter interface release residual lattice strain, improving charge collection inhibiting ion migration WBG perovskites. As result, achieve certified efficiencies 23.67% 21.70% opaque semi-transparent PSCs via 1.67-eV absorber. Moreover, four-terminal with efficiency 33.10% on an aperture area one square centimeter. wide-bandgap leads segregation. Here, authors reconstruct through followed passivation, achieving 33.1%

Language: Английский

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Full‐Color and High‐Resolution Femtosecond Laser Patterning of Perovskite Quantum Dots in Polyacrylonitrile Matrix

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

Abstract Laser patterning of perovskite quantum dots (PQDs) in polymer matrix enables situ synthesis, easy integration, and much improved long‐term stability, holding great promises for varieties photonics, optoelectronics applications. Although multi‐color PQD patterns have been demonstrated through tuning the halide stoichiometry, it remains significantly challenging to achieve full‐color due slow spontaneous crystallization chlorinated precursor at room temperature. Herein, polyacrylonitrile (PAN) is introduced serve as material, excess cyano groups which would coordinate with dissociative cesium lead cations film, leading suppression unprompted process. Taking advantage nonthermal contactless ultrafast femtosecond laser, PQDs are fabricated by stoichiometry PAN matrix, emission wavelength range 425–685 nm, spanning from deep blue red color, a sub‐diffraction feature size ≈400 nm. The approach allows ultrafine programmable fabrication arrays arbitrary high resolution stability. This facile, efficient, reliable technique believed offer novel pathway precise manufacturing various photonic or optoelectronic devices based on patterned PQDs.

Language: Английский

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Stabilization of highly efficient perovskite solar cells with a tailored supramolecular interface

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 20, 2024

The presence of defects at the interface between perovskite film and carrier transport layer poses significant challenges to performance stability solar cells (PSCs). Addressing this issue, we introduce a dual host-guest (DHG) complexation strategy modulate both bulk interfacial properties FAPbI

Language: Английский

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