Lead immobilization for environmentally sustainable perovskite solar cells

Nature, Journal Year: 2023, Volume and Issue: 617(7962), P. 687 - 695

Published: May 24, 2023

Language: Английский

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The Role of Grain Boundaries in Organic–Inorganic Hybrid Perovskite Solar Cells and its Current Enhancement Strategies: A Review

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(4)

Published: Jan. 31, 2024

Grain boundaries (GBs) in perovskite polycrystalline films are the most sensitive place for formation of defect states and accumulation impurities. Thus, abundant works have been carried out to explore their properties then try solve induced problems. Currently, two important issues remain. First, role GBs charge carrier dynamics is unclear due component complexity/defect tolerance nature insufficiency testing accuracy. Some conclude that benign, while others consider as recombination centers. Things sure deterioration ion transport decomposition. Second, known hazards GBs, a lot additives added anchoring ions passivate defects. But those works, surfaces treated same manner ignoring fact GB essentially homogeneous junction narrow slender space, surface heterogeneous with stratified structure. In this review, we focus on insight into them. Additionally, also discuss prospects maturity exploration toward upscaling manufacture photovoltaic related optoelectronic devices.

Language: Английский

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Perovskite heteroepitaxy for high-efficiency and stable pure-red LEDs

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Language: Английский

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Holistic Strategies Lead to Enhanced Efficiency and Stability of Hybrid Chemical Vapor Deposition Based Perovskite Solar Cells and Modules

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(21)

Published: April 14, 2023

Abstract Hybrid chemical vapor deposition (HCVD) is a promising method for the up‐scalable fabrication of perovskite solar cells/modules (PSCs/PSMs). However, efficiency HCVD‐based cells still lags behind solution‐processed PSCs/PSMs. In this work, oxygen loss electron transport layer SnO 2 in HCVD process and its negative impact on cell device performance are revealed. As counter‐measure, potassium sulfamate (H KNO 3 S) introduced as passivation to both mitigate issue passivate uncoordinated Pb 2+ film. parallel, N‐ methylpyrrolidone (NMP) used solvent dissolve PbI by forming intermediate phase •NMP, which can greatly lower energy barrier nucleation process. The seed employed further modulate kinetics crystal growth improve grain size. resultant yield champion power conversion (PCE) 21.98% (0.09 cm ) with stable output 21.15%, PCEs mini‐modules 16.16% (22.4 , 14.72%) 12.12% (91.8 ). Furthermore, unencapsulated small area shows an outstanding operational stability T 80 lifetime exceeding 4000 h.

Language: Английский

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Progress and issues in p-i-n type perovskite solar cells

DeCarbon, Journal Year: 2023, Volume and Issue: 3, P. 100025 - 100025

Published: Oct. 13, 2023

P-i-n type perovskite solar cells (PSCs) manifest some promising advantages in terms of remarkable operational stability, low-temperature processability, and compatibility for multi-junction devices, whereas relatively low efficiency compared to n-i-p PSCs because mismatched energy level alignment poor interface quality at both n- p-type contacts. Recently, great progress has been achieved the p-i-n PSCs, efficiencies exceeding 25% have reported from different research groups. Herein, state-of-the-art strategies deployment high-performance systematically reviewed including engineering top-surface buried films with eliminated non-radiative charge recombination, modulating conduction types perovskites well aligned facilitate transport, designing effective hole transport materials lossless extraction, so on, based on which perspectives further design efficient, stable scalable are provided aspects design, device fabrication, scalability functionalization.

Language: Английский

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Hole-Transport Management Enables 23%-Efficient and Stable Inverted Perovskite Solar Cells with 84% Fill Factor

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

Published: April 30, 2023

Abstract NiO x -based inverted perovskite solar cells (PSCs) have presented great potential toward low-cost, highly efficient and stable next-generation photovoltaics. However, the presence of energy-level mismatch contact-interface defects between hole-selective contacts (HSCs) perovskite-active layer (PAL) still limits device efficiency improvement. Here, we report a graded configuration based on both interface-cascaded structures p-type molecule-doped composites with two-/three-dimensional formamidinium-based triple-halide perovskites. We find that interface defects-induced non-radiative recombination at HSCs/PAL interfaces is remarkably suppressed because hole extraction transport. Moreover, strong chemical interaction, halogen bonding coordination are found in composites, which significantly suppress formation halide vacancy parasitic metallic lead. As result, PSCs present power-conversion-efficiency over 23% high fill factor 0.84 open-circuit voltage 1.162 V, comparable to best reported around 1.56-electron volt bandgap Furthermore, devices encapsulation operational stability 1,200 h during T 90 lifetime measurement (the time as function PCE decreases 90% its initial value) under 1-sun illumination ambient-air conditions.

Language: Английский

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Synergistic Passivation and Down‐Conversion by Imidazole‐Modified Graphene Quantum Dots for High Performance and UV‐Resistant Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(43)

Published: June 25, 2023

Abstract Organic–inorganic hybrid perovskite solar cells (PVSCs) have achieved stunning progress during the past decade, which has inspired great potential for future commercialization. However, tin dioxide (SnO 2 ) as a commonly used electron transport layer with varied defects and energy level mismatch contributes to loss limitation of charge extraction. Herein, imidazole‐modified graphene quantum dots (IGQDs) are introduced interlayer, plays significant role in three aspects: 1) dually passivating SnO buried interface by first‐principles calculations; 2) accelerating carrier extraction transfer owing ideal band alignment; 3) improving light utilization through down‐conversion proved intensity measurement. Consequently, devices based on IGQDs/SnO not only exhibit champion power conversion efficiency (PCE) 24.11%, but display significantly enhanced ultraviolet (UV) stability retaining about 81% their initial PCEs after continuous UV irradiation (365 nm, 20 mW cm −2 300 h. Moreover, unencapsulated modified device remains 82% storing 1650 h air (20–30 °C, RH 45–55%). This work furnishes novel method combination interfacial passivation photon management, holds out prospect employment other optoelectronic applications.

Language: Английский

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Surface Passivation with Tailoring Organic Potassium Salt for Efficient FAPbI₃ Perovskite Solar Cells and Modules

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

Published: June 3, 2024

Abstract Passivating surface defects on perovskite films with tailored functional materials has emerged as one of the most effective strategies for achieving high‐performance solar cells (PSCs). Among existing material selections, potassium salts stand out their passivation surrounding grain boundaries. However, widely used are inorganic and only soluble in highly polar solvents, which limits practical application passivation. Herein, a novel organic salt (KCFSO), multiple groups good solubility low isopropanol, is reported to function post‐treatment agent perovskite. Combined experimental results theoretical calculations, formed intermolecular interactions between KCFSO revealed play vital role determining defect effect. Thus, KCFSO‐modified film shows more uniform potential distribution, dramatically decreased density, improved charge transfer, leading champion power conversion efficiency (PCE) 25.11%, stability derived PSCs. As demonstration scalability, centimeter‐sized PSCs 5 cm × mini‐modules also demonstrate impressive PCEs 24.17% 20.18%, respectively. These findings provide insights into passivator design principles achieve efficient stable photovoltaics.

Language: Английский

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Self‐healing polymers in rigid and flexible perovskite photovoltaics

InfoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 15, 2024

Abstract Over the past 10 years, perovskite solar cell (PSC) device technologies have advanced remarkably and exhibited a notable increase in efficiency. Additionally, significant innovation approaches improved stability related to heat, light, moisture of PSC devices. Despite these developments PSCs, instability PSCs is pressing problem an urgent matter overcome for practical application. Recently, polymers been suggested suggestion has presented solve issues photovoltaic parameters Here, first, fundamental chemical bond types self‐healing are presented. Then, comprehensive presentation ability rigid flexible enhance various physical, mechanical, optoelectronic properties Furthermore, valuable insights innovative solutions perovskite‐based optoelectronics with provided, offering guidance future applications. image

Language: Английский

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Benzothieno[3,2‐b]thiophene‐Based Noncovalent Conformational Lock Achieves Perovskite Solar Cells with Efficiency over 24 %

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(52)

Published: Nov. 16, 2023

Organic semiconductors with noncovalently conformational locks (OSNCs) are promising building blocks for hole-transporting materials (HTMs). However, lack of satisfied neighboring negatively impacts the optoelectronic properties OSNCs-based HTMs and imperils stability perovskite solar cells (PSCs). To address this limitation, we introduce benzothieno[3,2-b]thiophene (BTT) to construct a new OSNC, resulting HTM ZS13 shows improved intermolecular charge extraction/transport properties, proper energy level, efficient surface passivation effect. Consequently, champion devices based on doped yield an efficiency 24.39 % 20.95 aperture areas 0.1 1.01 cm2 , respectively. Furthermore, good thermal capability inhibiting I- ion migration, thus, leading enhanced device stability. The success in neighboring-group engineering can triggered strong interest developing thienoacene-based OSNCs toward stable PSCs.

Language: Английский

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