Inverted Chiroptical Properties of Hybrid Metal Halides through Reversible Chiral Induction Driven by External and Internal Chirality Transfer

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Chiral organic-inorganic hybrid metal halides (OIHMHs) are commonly constructed by introducing pairs of enantiomorphic chiral precursors through a single chirality transfer pathway, which may limit the regulation structural diversity and chiroptoelectronic properties. Herein, we propose new strategy for achieving reversible induction OIHMHs with inverted chiroptical properties external internal pathways, utilizing reagent R-/S-α-methylbenzylamine (R-/S-MBA). Specifically, R-MBA can externally induce enrichment M-DMA4(Bi0.486In0.511Sb0.003)Cl7 (M-DMA4(Bi-In-Sb)Cl7, DMA = dimethylammonium cation) without integrating into structure. Conversely, insert structure, internally inducing formation DMA(R-MBA)2(Bi0.634In0.362Sb0.004)Cl6 (DMA(R-MBA)2(Bi-In-Sb)Cl6), reverses arrangements inverts both linear nonlinear Both induced exhibit significant responses high photoluminescence quantum yield (PLQY) second harmonic generation (SHG). Moreover, centimeter-sized rhombic crystal enables morphology- angle-dependent circularly polarized luminescence dissymmetry factor ∼0.02, anisotropy. The enhances SHG intensity nine-fold increases PLQY to 98.9%. This multi-path transfer, based on reagent, significantly broaden scope functional OIHMH materials facilitate

Language: Английский

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Inverted Chiroptical Properties of Hybrid Metal Halides through Reversible Chiral Induction Driven by External and Internal Chirality Transfer

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Abstract Chiral organic‐inorganic hybrid metal halides (OIHMHs) are commonly constructed by introducing pairs of enantiomorphic chiral precursors through a single chirality transfer pathway, which may limit the regulation structural diversity and chiroptoelectronic properties. Herein, we propose new strategy for achieving reversible induction OIHMHs with inverted chiroptical properties external internal pathways, utilizing reagent R ‐/ S ‐ α ‐methylbenzylamine ( ‐MBA). Specifically, ‐MBA can externally induce enrichment M ‐DMA 4 (Bi 0.486 In 0.511 Sb 0.003 )Cl 7 (Bi‐In‐Sb)Cl , DMA = dimethylammonium cation) without integrating into structure. Conversely, insert structure, internally inducing formation DMA( ‐MBA) 2 0.634 0.362 0.004 6 (DMA( ), reverses arrangements inverts both linear nonlinear Both induced exhibit significant responses high photoluminescence quantum yield (PLQY) second harmonic generation (SHG). Moreover, centimeter‐sized rhombic crystal enables morphology‐ angle‐dependent circularly polarized luminescence dissymmetry factor ∼0.02, anisotropy. The enhances SHG intensity nine‐fold increases PLQY to 98.9%. This multi‐path transfer, based on reagent, significantly broaden scope functional OIHMH materials facilitate

Language: Английский

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Wide-Bandgap Subcells for All-Perovskite Tandem Solar Cells: Recent Advances, Challenges, and Future Perspectives

Energies, Journal Year: 2025, Volume and Issue: 18(10), P. 2415 - 2415

Published: May 8, 2025

All-perovskite tandem solar cells (APTSCs) offer a promising pathway to surpassing the efficiency limits of single-junction photovoltaics. The wide-bandgap (WBG) subcell, serving as top absorber, plays critical role in optimizing light harvesting and charge extraction architectures. This review comprehensively summarizes recent advancements WBG subcells, focusing on material design, defect passivation strategies, interfacial engineering address challenges such phase instability, halide segregation, voltage losses. Key innovations, including compositional tuning, additive engineering, transport layer optimization, are critically analyzed for their contributions stability enhancement. Despite significant progress, remain regarding scalability, long-term under illumination, cost-effective fabrication. Future research directions include development lead-reduced perovskites, machine learning-guided discovery, scalable deposition techniques. provides insights into advancing subcells toward high-efficiency, stable, eco-friendly APTSCs next-generation energy applications.

Language: Английский

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Bifunctional 4,5-Diiodoimidazole Interfacial Engineering Enables Simultaneous Defect Passivation and Crystallization Control for High-Efficiency Inverted Perovskite Solar Cells

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(10), P. 766 - 766

Published: May 20, 2025

Despite the rapid efficiency advancement of perovskite solar cells (PSCs), non-radiative recombination at buried interface between self-assembled monolayers (SAMs) and remains a critical bottleneck, primarily due to interfacial defects energy level mismatch. In this study, we demonstrate bifunctional interlayer engineering strategy by introducing 4,5-diiodoimidazole (4,5-Di-I) Me-4PACz/perovskite interface. This approach uniquely addresses two fundamental limitations SAM-based interfaces: insufficient defect passivation capability conventional Me-4PACz steric hindrance effects poor wettability on hydrophobic SAM surfaces that exacerbates voids. The imidazole derivatives not only form strong Pb–N coordination bonds with undercoordinated Pb2+ but also modulate surface Me-4PACz, enabling growth pinhole-free films preferential crystal orientation. champion device 4,5-Di-I modification achieves power conversion (PCE) 24.10%, VOC enhancement from 1.12 V 1.14 V, while maintaining 91% initial PCE after 1300 h in N₂ atmosphere (25 °C), demonstrating superior stability under ISOS-L-2 protocols. work establishes universal for multifunctionality design, proving simultaneous suppression crystallization control can break long-standing trade-off solution-processed photovoltaics.

Language: Английский

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