Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: March 15, 2023

Abstract Since the discovery in 2011, MXenes have become rising star field of two-dimensional materials. Benefiting from metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, exhibit great application prospects energy storage conversion, sensors, optoelectronics, electromagnetic interference shielding biomedicine. Nevertheless, two issues seriously deteriorate further development MXenes. One is high experimental risk common preparation methods such as HF etching, other difficulty obtaining with controllable groups. Recently, Lewis acidic a brand-new strategy for MXenes, has attracted intensive attention due to its safety ability endow uniform terminations. However, comprehensive review etching method not been reported yet. Herein, we first introduce following four aspects: mechanism, terminations regulation, in-situ formed metals delamination multi-layered Further, applications MXene-based hybrids obtained by route sensors microwave absorption are carefully summarized. Finally, some challenges opportunities also presented.

Language: Английский

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Enhanced charge carrier transport and defects mitigation of passivation layer for efficient perovskite solar cells

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

Published: Oct. 4, 2024

Surface passivation has been developed as an effective strategy to reduce trap-state density and suppress non-radiation recombination process in perovskite solar cells. However, agents usually own poor conductivity hold negative impact on the charge carrier transport device. Here, we report a binary synergistical post-treatment method by blending 4-tert-butyl-benzylammonium iodide with phenylpropylammonium spin-coating surface form layer. The post-treated films show enhanced crystallinity improved molecular packing well better energy band alignment, benefiting for hole extraction transfer. Moreover, defects are further passivated compared unary passivation. Based strategy, record-certified quasi-steady power conversion efficiency of 26.0% cells is achieved. devices could maintain 81% initial after 450 h maximum point tracking.

Language: Английский

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Two-Dimensional Materials for Highly Efficient and Stable Perovskite Solar Cells

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: May 23, 2024

Perovskite solar cells (PSCs) offer low costs and high power conversion efficiency. However, the lack of long-term stability, primarily stemming from interfacial defects susceptible metal electrodes, hinders their practical application. In past few years, two-dimensional (2D) materials (e.g., graphene its derivatives, transitional dichalcogenides, MXenes, black phosphorus) have been identified as a promising solution to solving these problems because dangling bond-free surfaces, layer-dependent electronic band structures, tunable functional groups, inherent compactness. Here, recent progress 2D material toward efficient stable PSCs is summarized, including role both interface electrodes. We discuss beneficial effects on perovskite growth, energy level alignment, defect passivation, well blocking external stimulus. particular, unique properties form van der Waals heterojunction at bottom are emphasized. Finally, perspectives further development using provided, such designing high-quality heterojunction, enhancing uniformity coverage nanosheets, developing new materials-based

Language: Английский

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Chlorinated-Ti₃C₂T_F as a dual-functional buried interface on SnO₂ electron-transporting layers for 25.09% high-performance n–i–p perovskite solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3454 - 3469

Published: Jan. 1, 2024

Chlorinated-Ti 3 C 2 T F is used as dual functional buried-interface on SnO electron transporting layer for 25.09% high performance n–i–p perovskite solar cells.

Language: Английский

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Halides‐Enhanced Buried Interfaces for Stable and Extremely Low‐Voltage‐Deficit Perovskite Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: April 6, 2023

Abstract The perovskite buried interfaces have demonstrated pivotal roles in determining both the efficiency and stability of solar cells (PSCs); however, challenges remain understanding managing due to their non‐exposed feature. Here, we proposed a versatile strategy pre‐grafted halides strengthen SnO 2 –perovskite interface by precisely manipulating defects carrier dynamics through alteration halide electronegativity ( χ ), thereby resulting favorable crystallization minimized interfacial losses. Specifically, implementation fluoride with highest induces strongest binding affinity uncoordinated cations, leading retarded high‐quality films reduced residual stress. These improved properties enable champion efficiencies 24.2% (the control: 20.5%) 22.1% 18.7%) rigid flexible devices extremely low voltage deficit down 386 mV, all which are among reported values for PSCs similar device architecture. In addition, exhibit marked improvements longevity under various stressors humidity (>5000 h), light (1000 heat (180 bending test (10 000 times). This method provides an effective way improve quality toward high‐performance PSCs.

Language: Английский

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Recent progress in two-dimensional Nb2C MXene for applications in energy storage and conversion

Materials & Design, Journal Year: 2023, Volume and Issue: 231, P. 112046 - 112046

Published: June 2, 2023

Two-dimensional niobium carbide (Nb2C), a member of the emerging MXene family, has recently garnered attention in various fields, including materials science, physics, chemistry, and nanotechnology. In this review, we highlight material properties, synthesis strategies, applications Nb2C energy storage devices, catalysis, photovoltaic devices. We first introduce methods, structural characteristics, notable chemical physical properties. Then, discuss influence morphology, functional groups, electrolytes on electrochemical present compare advancements Nb2C-based batteries supercapacitors. Next, summarize current progress electrocatalytic photocatalytic hydrogen evolution reactions. Finally, implementation as charge transport layer organic perovskite solar cells. These examples encompass diverse architectures, interface configurations, functionalization approaches, showing promising future for rising material. They also inspire researchers to come up with innovative designs improve device performance extend possible MXene.

Language: Английский

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Dynamic self-assembly of small molecules enables the spontaneous fabrication of hole conductors at perovskite/electrode interfaces for over 22% stable inverted perovskite solar cells

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(7), P. 2609 - 2617

Published: Jan. 1, 2023

The bottom hole transport layers (HTLs) are of paramount importance in determining both the efficiency and stability inverted perovskite solar cells (PSCs), however, their surface nature properties strongly interfere with upper crystallization kinetics also influence interfacial carrier dynamics. In this work, we strategically develop a simple, facile spontaneous fabrication method HTL at perovskite/electrode interface by dynamic self-assembly (DSA) small molecules during crystallization. Different from traditional layer-by-layer approach, DSA strategy involves bilateral movement self-assembled (SAMs) solution, realizing simultaneous passivation. We design multifunctional molecule, (4-(7H-benzo[c]carbazol-7-yl)butyl)phosphonic acid (BCB-C4PA), for process, to optimize ability energy alignment. Benefitting unconventional approach BCB-C4PA, champion PCE 22.2% is achieved along remarkable long-term environmental over 2750 h, which among highest reported efficiencies SAM-based PSCs. This investigation provides creative, unique effective molecular preparing reliable charge layers, opening up new avenues further development efficient contacts

Language: Английский

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Functionalized MXene/Halide Perovskite Heterojunctions for Perovskite Solar Cells Stable Under Real Outdoor Conditions

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(44)

Published: Oct. 15, 2023

Abstract Despite the performance improvement in perovskite solar cells (PSCs) when MXenes are employed as transport layers, device stability studies still missing. Especially under real outdoor conditions where devices subjected to synergy of multiple stressors. In this work, functionalized 2D titanium carbide (Ti 3 C 2 ) MXene is normal PSC configuration, at interface between halide and hole layer. The functionalization Ti made utilizing same organic additive passivating functionalizing strategy creates a continuous link Champion MXene‐based PSCs revealed ≈22% efficiency, comparison with control showing 20.56%. Stability analyses ISOS protocols different (dark, light irradiation analysis) reveal that enhancement lifespan always observed layer employed. Analysis irradaition (ISOS‐L) an almost 100% retention efficiency for MXene‐modified device, testing (ISOS‐O) carried out > 600 h reveals T 80 ≈600 h, while degrades completely. To best authors' knowledge, first report assesment conditions.

Language: Английский

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Dual-interface engineering induced by silane coupling agents with different functional groups constructing high-performance flexible perovskite solar cells

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143790 - 143790

Published: May 27, 2023

Language: Английский

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Tungstate‐mediated In‐situ Passivation of Grain Boundary Grooves in Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(24)

Published: April 15, 2023

Possessed with advantageous optoelectronic properties, perovskites have boosted the rapid development of solution-processed solar cells. The performance perovskite cells (PSCs) is significantly weakened by carrier loss at grain boundary grooves (GBGs); however, it receives limited attention and there lacks effective approach to solve this issue. Herein, for first time, we constructed tungstate/perovskite heterointerface via a "two step" in situ reaction that provides defect passivation ensures efficient dynamics GBGs. exposed boundaries converted wide-band-gap PbWO4 an in-situ between Pb2+ tungstate ions, which passivate defects due strong ionic bonding. Moreover, recombination further suppressed energetics modification based on additional transformation from CaWO4 . PSCs groove strategy showed good universality both normal inverted structure, improved efficiency 23.25 % n-i-p device 23.33 p-i-n device. Stable power output modified could maintain 91.7 after around 1100 h, retain 92.5 aging air 2110 93.1 85 °C N2 972 h.

Language: Английский

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