Yongfei Wang

Compositional disorder and insufficient passivation of defects remain major obstacles to simultaneously achieving high‐efficiency and long‐term stability in low‐dimensional perovskite‐containing inverted perovskite solar cells (PSCs). Here, we report a multifunctional short‐chain organic salt, 2‐hydrazino‐2‐imidazoline hydrobromide (HyImBr), for reconstructing a well‐defined one/three dimensional (1D/3D) heterostructure at the top interface. Owing to its compact molecular structure and abundant nitrogen‐containing functional groups, HyImBr simultaneously enables hydrogen bonding with A‐site cations/halides, coordination with undercoordinated Pb ^{2 +} , and effective passivation of multiple types of defects, thereby reducing the overall defect‐state density. The reconstructed surface also releases local tensile strain and optimizes energy‐level alignment for efficient electron extraction. As a result, the HyImBr‐treated inverted PSC device delivers a champion power conversion efficiency of 26.11%, significantly outperforming the control device (23.51%) through simultaneous improvements in open‐circuit voltage and fill factor. The unencapsulated device retains 92.16% of its initial efficiency after 1100 h of storage in air. This work presents a molecular design strategy for constructing uniform, defect‐passivated, and oxidation‐resistant 1D/3D heterostructures, enabling efficient and stable photovoltaic devices.

Chiral luminescent materials integrating strong emission and efficient X-ray scintillation hold great promise for multifunctional optoelectronic applications, yet their design remains challenging. Herein, we report a series of zero-dimensional enantiomeric pairs of copper(I) iodide-based organic–inorganic hybrid compounds, constructed from chiral 1-methoxyethyl pyridine ligands. These compounds exhibit intense photoluminescence with quantum yields up to 96%. Experimental and theoretical studies reveal that the emission originates from multiple excited states with significant dependence on cuprophilic interactions. When used as X-ray scintillators, compound S-1 exhibits high radioluminescence light yield, excellent stability, and outstanding spatial resolution. Coupled with its polarization characteristics from chiral structures, these results demonstrate the considerable potential of such materials as high-performance multifunctional scintillators for advanced radiation detection and imaging.

Constructing 1D/3D heterojunctions at the top interface has emerged as a promising strategy to mitigate non‐radiative recombination and improve the stability of perovskite solar cells (PSCs). However, rational molecular design principles of organic components remain elusive, and the morphological instability of fullerene‐based electron transport layers has been largely overlooked. Here, we introduce a heterocyclic amidine‐functionalized molecule, 1H‐pyrazole‐1‐carboxamidine hydroiodide (PCAI), to construct a 1D/3D heterojunction at the perovskite/C ₆₀ interface. The molecular design features multiple hydrogen‐bonding sites, an extended π‐conjugated plane, and compact cationic size, enabling selective formation of phase‐pure 1D (PCA)PbI ₄ perovskitoid, while residual PCA ⁺ cations uniformly coat the perovskite surface. This surface reconstruction effectively suppresses non‐radiative recombination and optimizes energy‐level alignment, yielding a record‐level power conversion efficiency of 26.33% among 1D/3D heterojunction‐based PSCs. More importantly, PCAI acts as a “molecular glue” that anchors C ₆₀ molecules on the perovskite surface, suppressing C ₆₀ self‐aggregation and preserving interfacial integrity under operational stress. This work establishes a clear structure–property–performance relationship for material design and identifies C ₆₀ morphological evolution as a decisive yet previously underexplored stability factor.

In 0D Cu( i ) iodide AIO hybrids, weaker intermolecular hydrogen bonding suppresses ³ ILCT and promotes ³ (M + X)LCT emission, enabling a near-unity PLQY of 98.5% together with efficient X-ray radioluminescence.

Interfacial instability leading to rapid cycle life degradation remains a critical bottleneck for anode-free lithium metal batteries (AFLMBs). To address this, we propose a thermodynamic regulation strategy termed "pre-cycling + high-temperature resting" to tailor the solid electrolyte interphase (SEI). By introducing a mild thermal aging treatment at 40°C following the initial charge to 70% state of charge (SOC), a dense and uniform SEI film rich in inorganic components (LiF and Li3N) is successfully induced on the copper current collector. Multi-scale characterization results show that this strategy significantly enhances the mechanical strength of the SEI film (Young's modulus up to 7.41 GPa) and the ion transport kinetics of the electrolyte (lithium-ion transference number reaching 0.946). Consequently, lithium dendrite growth and dead lithium formation are effectively suppressed. Benefiting from these optimized interfacial properties, the assembled LFP||Cu anode-free full cells exhibit exceptional cycling stability at a current density of 1 mA cm-2. This work confirms the immense potential of mild thermal aging as a simple yet effective approach to resolve interfacial challenges in high-energy-density AFLMBs.

Biomass‐derived carbon materials have become a highly ideal target for manufacturing more sustainable hydrogen evolution reaction (HER) catalysts due to their tunable porous structure and economic benefits. Herein, we synthesize a novel palladium (Pd) catalyst onto N‐doped biomass‐derived porous carbon (Pd‐NCPC) by a high‐temperature carbonization method, in which abandoned pinecones are the starting renewable material. By introducing heteroatoms N, the structural properties of the synthesized catalyst can be well adjusted, which significantly increases the defect density of the carbon material and promotes the highly dispersed anchoring of Pd nanoparticles. The Pd‐NCPC catalyst exhibits excellent HER activity, achieving 10 mA cm ⁻² with only 76 mV in 0.5 M H ₂ SO ₄ and 96 mV in 1 M KOH. Its performance is comparable to that of commercial Pt/C. This material exhibits extremely high stability in both acidic and alkaline environments, with almost no decrease in activity. This study not only provides a new approach for the high‐value‐added utilization of biomass waste but also provides a theoretical basis and experimental support for the development of low‐cost and efficient hydrogen evolution catalysts suitable for a wide pH range.

Herein, a highly active Cu‐UiO‐66 catalyst was constructed by precisely anchoring monodisperse Cu sites through Zr ₆ ‐oxo cluster nodes, which enabled efficient oxidative coupling of primary amines under mild conditions with 98% imine yield. The catalytic system used oxygen in air as the oxidant, and no noble metal or strong chemical oxidant was required. The high selectivity of imine was achieved by inhibiting further oxidation of the C═N bond through the pore‐limited domains of metal‐organic frameworks (MOFs) and Cu site synergy. As a result of experimental and characterization results, Cu doping was found to significantly increase the oxygen vacancy concentration, enhance the electron transfer efficiency, and promote the generation of the key active species O ₂ ^·− . In addition, Cu‐UiO‐66 exhibits excellent cycling stability (≥ 5 cycles) and maintains superior catalytic activity. Cu‐UiO‐66 solves the problems of low selectivity and harsh conditions in imine synthesis through its unique structural properties.