Industry outlook of perovskite quantum dots for display applications

Nature Nanotechnology, Journal Year: 2022, Volume and Issue: 17(8), P. 813 - 816

Published: July 22, 2022

Language: Английский

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Fabrication of perovskite solar cells in ambient air by blocking perovskite hydration with guanabenz acetate salt

Nature Energy, Journal Year: 2023, Volume and Issue: 8(10), P. 1158 - 1167

Published: Sept. 28, 2023

Language: Английский

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Synergistic Role of Water and Oxygen Leads to Degradation in Formamidinium-Based Halide Perovskites

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 2, 2023

Mixed-cation metal halide perovskites have shown remarkable progress in photovoltaic applications with high power conversion efficiencies. However, to achieve large-scale deployment of this technology, efficiencies must be complemented by long-term durability. The latter is limited external factors, such as exposure humidity and air, which lead the rapid degradation perovskite materials devices. In work, we study mechanisms causing Cs formamidinium (FA)-based phase transformations stabilization during moisture air exposure. We use situ X-ray scattering, photoelectron spectroscopy, first-principles calculations these chemical interactions their effects on structure. unravel a surface reaction pathway involving dissolution FAI water iodide oxidation oxygen, driving Cs/FA ratio into thermodynamically unstable regions, leading undesirable transformations. This work demonstrates interplay bulk reactions, providing detailed understanding mechanism strategies for designing durable efficient materials.

Language: Английский

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Solvent engineering for scalable fabrication of perovskite/silicon tandem solar cells in air

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

Published: June 8, 2024

Abstract Perovskite/silicon tandem solar cells hold great promise for realizing high power conversion efficiency at low cost. However, achieving scalable fabrication of wide-bandgap perovskite (~1.68 eV) in air, without the protective environment an inert atmosphere, remains challenging due to moisture-induced degradation films. Herein, this study reveals that extent moisture interference is significantly influenced by properties solvent. We further demonstrate n-Butanol (nBA), with its polarity and moderate volatilization rate, not only mitigates detrimental effects air during but also enhances uniformity This approach enables us achieve impressive 29.4% (certified 28.7%) double-sided textured perovskite/silicon featuring large-size pyramids (2–3 μm) 26.3% over aperture area 16 cm 2 . advance provides a route large-scale production cells, marking significant stride toward their commercial viability.

Language: Английский

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Powering the Future: Opportunities and Obstacles in Lead‐Halide Inorganic Perovskite Solar Cells

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

Abstract Efficiency, stability, and cost are crucial considerations in the development of photovoltaic technology for commercialization. Perovskite solar cells (PSCs) a promising third‐generation due to their high efficiency low‐cost potential. However, stability organohalide perovskites remains significant challenge. Inorganic perovskites, based on CsPbX ₃ (X = Br − /I ), have garnered attention excellent thermal optoelectronic properties comparable those perovskites. Nevertheless, inorganic faces several hurdles, including need high‐temperature annealing achieve photoactive α‐phase susceptibility transitioning into nonphotoactive δ‐phase under environmental stressors, particularly moisture. These challenges impede creation high‐efficiency, high‐stability devices using low‐cost, scalable manufacturing processes. This review provides comprehensive background fundamental structural, physical, lead‐halide It discusses latest advancements fabricating PSCs at lower temperatures ambient conditions. Furthermore, it highlights progress state‐of‐the‐art devices, manufactured environments reduced temperatures, alongside simultaneous upscaling PSCs.

Language: Английский

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Recent Advances in Lead-Free Halide Perovskites for Photocatalysis

ACS Materials Letters, Journal Year: 2022, Volume and Issue: 5(1), P. 60 - 78

Published: Dec. 1, 2022

Metal halide perovskites have attracted extensive attention in the field of photocatalysis, because their excellent photophysical properties, including high optical absorption coefficients, tunable band structures, and long carrier diffusion lengths. The application prospect conventional lead-based is restricted by toxicity instability issues. Therefore, it imperative to develop environmentally friendly stable lead-free (LFHPs) for photocatalysis. In recent years, rapid development LFHPs has provided new opportunities photocatalytic applications, ranging from solar-to-chemical energy conversion organic reactions. this Review, we summarize progresses with an emphasis on strategies available improve performance stability. Furthermore, present outlook future directions challenges emerging field.

Language: Английский

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Halide Vacancies Create No Charge Traps on Lead Halide Perovskite Surfaces but Can Generate Deep Traps in the Bulk

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(26), P. 6028 - 6036

Published: June 23, 2023

Metal halide perovskites (MHPs) have attracted attention because of their high optoelectronic performance that is fundamentally rooted in the unusual properties MHP defects. By developing an ab initio-based machine-learning force field, we sample structural dynamics MHPs on a nanosecond time scale and show vacancies create midgap trap states bulk but not surface. Deep traps result from Pb-Pb dimers can form across vacancy only bulk. The required shortening distance by nearly 3 Å facilitated either charge trapping or 50 ps thermal fluctuations. large-scale deformations are possible soft. Halide surface no deep separate electrons holes, keeping charges mobile. This particularly favorable for quantum dots, which do require sophisticated passivation to emit light blink less than dots formed traditional inorganic semiconductors.

Language: Английский

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Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO₂ Reduction

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1932 - 1975

Published: April 4, 2024

Carbon dioxide (CO2), an archetypal greenhouse gas, can be transformed into valuable fuels through photocatalysis, presenting auspicious avenue for combating global climate change and energy crisis. While halide perovskites have sparked substantial research interest, concerns over lead toxicity spurred exploration of their lead-free counterparts CO2 photoreduction. This comprehensive Review navigates the fundamentals reduction, delving basic principles, mechanisms, relevant operando techniques. It then introduces diverse structures (LFHPs), synthesis methodologies, intrinsic properties that render them suitable Subsequently, unfolds application modification strategies light-driven conversion, highlighting breakthroughs shedding light on potential mechanisms. Finally, current challenges to tailor LFHPs robust photocatalytic reduction are critically discussed, offering insights future in this realm. aims illuminate path toward sustainable bridging knowledge gaps inspiring innovations a greener carbon-neutral tomorrow.

Language: Английский

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In Situ Growth of a Robust 1D Capping Layer for Stable and Efficient CsPbI₃ Perovskite Solar Cells Without Hole Transporter

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(16)

Published: Jan. 28, 2024

Abstract CsPbI 3 perovskite is a promising light absorber in solar cells (PSCs) due to its suitable bandgap ( E g ) and high chemical stability, but the phase metastable ambient atmosphere prone defect formation. To enhance stability reduce defects, forming low dimensional (LD) on has proved effective. However, energy levels for most of low‐conductivity LD perovskites are not very compatible with those , which will impair charge separation device performance. Herein, new 1D (5‐Azaspiro[4.4]nonan‐5‐ium lead triiodide, ASNPbI large reported as capping layer. The p‐type forms p‐n heterojunction n‐CsPbI staggered band alignment, considerably enhancing carrier separation. Besides, by pre‐forming at an intermediate stage, defects suppressed film. Consequently, PSCs based carbon electrode without hole transporter (C‐PSCs) achieves PCE 18.34%, among highest‐reported values inorganic C‐PSCs. Furthermore, hydrophobic layer thermal that greatly enhances stability. Hence, C‐PSCs maintains 68% initial after 400 h aging 85°C N 2 glovebox.

Language: Английский

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Harnessing Pb–S Interactions for Long‐Term Water Stability in Cesium Lead Halide Perovskite Nanocrystals

Small, Journal Year: 2024, Volume and Issue: 20(35)

Published: April 16, 2024

Lead halide perovskite nanocrystals (LHP NCs) have garnered attention as promising light-harvesting materials for optoelectronics and photovoltaic devices, attributed to their impressive optoelectronic properties. However, susceptibility moisture-induced degradation has hindered practical applications. Despite various encapsulation strategies, challenges persist in maintaining stability performance simultaneously. Here, a ligand exchange approach is proposed using (11-mercaptoundecyl)-N,N,N-trimethylammonium bromide (MUTAB) enhance the dispersibility of CsPbBr

Language: Английский

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