Xiaotian Hu

We present an all-printed immunosensing microchip integrating hydrophilic–hydrophobic patterning, antibody immobilization, and photonic bandgap engineering into a single, scalable manufacturing platform for high-sensitivity protein detection.

The service stability of flexible perovskite solar module (FPSM) is contingent upon the bonding strength and stress‐response behavior at heterointerfaces. However, the fullerene‐based layer mainly relies on weak non‐covalent interactions. This makes it difficult for the FPSM to tackle the challenges posed by the coupling of multiple stresses in the actual service environment. Through the blending strategy of the polyamide curing agent and fullerene derivatives, we constructed an active energy‐dissipating multi‐bond network featuring covalent bond anchoring and hydrogen bond dissipation, which significantly enhanced the interfacial bonding and energy dissipation capabilities. Based on this strategy, a 100 cm ² FPSM achieves a recorded power conversion efficiency of 22.33% (certified 21.5%). More importantly, for the first time, we developed an in situ bending electroluminescence experiment for FPSM under ultraviolet irradiation. After 5000 consecutive bending cycles, there was no significant decline in the module's performance, which verified its service stability under multi‐field coupling.

Bisphosphonate‐anchored self‐assembled monolayers (SAMs) play a pivotal function in the development of high‐performance inverted perovskite solar cells (PSCs). However, the strong aggregation tendency of SAM molecules on substrates significantly limits the power conversion efficiency (PCE) of the devices. In this study, a spirocyclic linkage strategy is introduced for the first time into the molecular design of bisphosphonate‐based SAM hole‐transporting materials, and three target compounds, SCF‐4PADCB, SF‐4PADCB, and SFT‐4PADCB, are successfully synthesized. The twisted spiro‐conformation effectively suppresses intermolecular π–π stacking aggregation. In addition, SCF‐4PADCB hole‐transporting layer optimizes the interfacial energy level alignment, and passivates the defects of perovskite. Consequently, the inverted PSCs based on SCF‐4PADCB achieve a champion PCE of 26.58%. Moreover, the unencapsulated device retains 91.26% of its initial PCE after 1200 h of maximum power point tracking and exhibits outstanding ultraviolet stability. Impressively, SCF‐4PADCB also demonstrates excellent versatility, delivering a PCE of 23.46% in 1.68 eV wide‐bandgap PSCs and a superior indoor PCE of 43.65% under 1000 lux LED illumination. This work provides a promising molecular design strategy for developing novel SAMs toward highly efficient and stable PSCs.

Bisphosphonate‐anchored self‐assembled monolayers (SAMs) play a pivotal function in the development of high‐performance inverted perovskite solar cells (PSCs). However, the strong aggregation tendency of SAM molecules on substrates significantly limits the power conversion efficiency (PCE) of the devices. In this study, a spirocyclic linkage strategy is introduced for the first time into the molecular design of bisphosphonate‐based SAM hole‐transporting materials, and three target compounds, SCF‐4PADCB, SF‐4PADCB, and SFT‐4PADCB, are successfully synthesized. The twisted spiro‐conformation effectively suppresses intermolecular π–π stacking aggregation. In addition, SCF‐4PADCB hole‐transporting layer optimizes the interfacial energy level alignment, and passivates the defects of perovskite. Consequently, the inverted PSCs based on SCF‐4PADCB achieve a champion PCE of 26.58%. Moreover, the unencapsulated device retains 91.26% of its initial PCE after 1200 h of maximum power point tracking and exhibits outstanding ultraviolet stability. Impressively, SCF‐4PADCB also demonstrates excellent versatility, delivering a PCE of 23.46% in 1.68 eV wide‐bandgap PSCs and a superior indoor PCE of 43.65% under 1000 lux LED illumination. This work provides a promising molecular design strategy for developing novel SAMs toward highly efficient and stable PSCs.

The continuous breakthroughs in photovoltaic conversion efficiency (PCE) of inverted perovskite solar cells (PSCs) demonstrate the enormous potential for commercial application. However, accumulating numerous defects at the buried interface and residual strain within the perovskite film severely constrain the further improvement in PCE and stability of the optoelectronic device. Herein, two benzyl phosphoric acids, brominated benzyl phosphate (4‐BrBPA) and methoxy‐substituted benzyl phosphate (4‐MeOBPA), both containing double binding sites were assembled between [4‐(3,6‐dimethyl‐9 H ‐carbazol‐9‐yl)butyl]phosphonic acid (Me‐4PACz) hole transport layers (HTLs) and perovskite as buried interface modifiers. More interestingly, the dipole orientation of 4‐BrBPA aligned with Me‐4PACz, which can promote interface energy level alignment, and facilitate carrier extraction and transport. In addition, the phosphate groups (─PO ₃ H ₂ ) group and Br atom in 4‐BrBPA can chelate with uncoordinated Pb ²⁺ and vacancy I ⁻ , which will effectively achieve perovskite interfacial defect passivation and strain release. Consequently, the PSCs based on 4‐BrBPA interface layer achieve champion efficiency of 26.62% (certified 26.22%). Moreover, this strategy is extended to wide‐bandgap (1.77 eV), large‐area (1 cm ² ) PSCs, and mini‐module (11.3 cm ² ), resulting in PCEs of 21.64%, 24.43%, and 21.08%, respectively. The optimized PSCs demonstrate excellent operational and storage stability. This work provides an effective strategy for interface modification and strain regulation.

Interface nonradiative recombination critically limits the efficiency and stability of perovskite solar cells, especially in two‐dimensional structures where compositional complexity intensifies defect formation. Here, we engineer the interface using a series of dipole molecules to achieve multifunctional passivation. The optimized molecule, 3‐(trifluoromethyl)thiophenol, uniquely combines trifluoromethyl (─CF ₃ ) and thiol (‐SH) groups, enabling simultaneous defect passivation at both the perovskite surface (via Pb ²⁺ coordination) and the[6,6]‐Phenyl‐C61‐butyric acid methyl ester (PCBM) interface (via S···ester interaction), while its intrinsic dipole enhances charge extraction and energy‐level alignment. Moreover, the hydrophobic molecular layer effectively inhibits moisture and ion migration. Two‐dimensional perovskite solar cells (GA(MA) ₅ Pb ₅ I ₁₆ ) achieve a power conversion efficiency of 22.30% with improved stability. This work provides a rational design strategy for interface molecules that integrate passivation, dipole engineering, and environmental protection, offering a viable route toward efficient and stable perovskite photovoltaics.

The uncontrolled nucleation and crystallization processes of hybrid perovskite materials continue to impede the efficiency tolerance and fabrication reproducibility of large‐area perovskite solar cells (PSCs). Herein, we report a printing‐compatible vapor‐assisted post‐treatment method that promotes the thermodynamically favored formation of the α‐phase perovskite while repairing multi‐dimensional defects throughout the films. Polarity‐optimized solvents have been established as an effective pre‐treatment strategy for both surfaces and grain boundaries, facilitating vapor‐assisted pathways that effectively suppress defect states across the entire thickness. Consequently, the treated PSCs achieved champion power conversion efficiencies (PCEs) of 26.31% (0.04 cm ² ) and 25.44% (1.01 cm ² ), while a mini‐module (41.3 cm ² ) delivered 22.30% with optimal reproducibility, accompanied by enhanced humidity resistance, thermal robustness, and operational stability. Notably, the mini‐module retained nearly 90% of its initial efficiency after 550 h of continuous 1‐sun operation. This method offers a collaborative approach for mitigating the defect enrichment issue during the printing process, which aligns with the requirements of industrial batch production of perovskite photovoltaics.