SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4480-1
Ternary organic solar cells (OSCs) incorporating a structurally compatible guest acceptor (C7-Cl) into the PM6:BTP-eC9 host system are demonstrated. The low Flory-Huggins interaction parameter between host and guest acceptors facilitates intimate mixing, optimizing molecular packing and energy-level alignment. High-sensitivity sEQE and EQEEL analyses reveal a reduced non-radiative energy loss (KE3) of 0.216 eV in the ternary device. Consequently, the optimized ternary OSC achieves a champion power conversion efficiency (PCE) of 20.02% and an improved T80 operational lifetime of 1065 h. This work establishes a feasible strategy via structurally compatible guest doping to simultaneously optimize vertical phase separation and suppress non-radiative loss, providing a facile and effective route toward high-performance and stable OSCs.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3716-x
Flexible pressure sensors (FPSs) are pivotal for fall detection and rehabilitation training, yet conventional synthetic-based sensors suffer from resource-intensive manufacturing, high costs, and environmental pollution. This study introduces a sustainable fabrication strategy for FPSs using natural materials. Electrodes were fabricated by treating natural wood strips with a flame retardant, converting them into high-quality graphene via cost-effective infrared laser processing, and transferring onto starch-based substrates. The dielectric layer comprised an electrospun composite nanofiber membrane of cyclodextrin and carbon nanotubes. The resultant capacitive FPS exhibited high sensitivity (2.15 kPa⁻¹ within 0–10 kPa), a low detection limit (~6.5 Pa), rapid response and recovery times (29 ms and 39 ms), and excellent long-term stability exceeding 5000 cycles. Biocompatibility was outstanding (cell viability >98%), and the sensor fully degraded within 6 hours. Integrated with wireless technology, the sensor enabled a fall detection and rehabilitation monitoring system. Data processing utilized a Tiny Machine Learning module on a mobile platform, transmitting data to a cloud-based system. The system accurately identified five common fall postures and assisted clinicians in guiding rehabilitation exercises, achieving recognition accuracies of 99% and 100%, respectively. This work offers a sustainable healthcare solution for elderly care, addressing environmental and economic limitations of existing FPS technologies.
Journal of Environmental Engineering Technology•2026•DOI: 10.13205/j.hjgc.202605001
The lower reaches of the Yangtze River Basin, as a concentrated area of China's C5 petroleum resin industry, face critical bottlenecks in green and low-carbon transformation due to high-pollution, refractory wastewater and high carbon emissions. Traditional petrochemical wastewater treatment technologies suffer from low efficiency, high energy consumption, and insufficient resource utilization. This paper systematically analyzes the sources of wastewater in C5 petroleum resin production from principles and processes, and reviews research progress and carbon reduction potential of current technologies in three aspects: new materials, new equipment, and new processes. Integrated processes centered on efficient pretreatment, biological enhancement, and multi-technology coupling show significant advantages in improving treatment efficiency, reducing energy consumption and cost, and strengthening resource recovery. The study also prospects future research priorities for pollution and carbon mitigation through green technological innovation and intelligent upgrading, providing new solutions for 'near-zero discharge' and resource recycling of C5 petroleum resin wastewater, thereby promoting the green and low-carbon transformation of the petrochemical industry.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3798-x
Ulcerative colitis (UC) is a chronic inflammatory disorder of the colorectal mucosa, where conventional enema therapies suffer from poor retention and limited inflammation modulation. Here, we report a highly fluid probiotic-containing enema solution (s-BSA-Fe+EcN) integrating bovine serum albumin (BSA), Fe2+, and probiotic Escherichia coli Nissle 1917 (EcN). The solution's high fluidity enables comprehensive coverage of irregular colorectal mucosa. Upon encountering reactive oxygen species (ROS)-rich inflamed lesions, Fe2+ mediates H2O2 scavenging and hydroxyl radical generation, triggering BSA crosslinking and in situ gelation into a conformal hydrogel (h-BSA-Fe+EcN). This targeted adhesion mitigates oxidative damage to host tissues and preserves probiotic viability. In a porcine model, endoscopic imaging confirmed inflammation-targeted gelation in vivo. In a dextran sulfate sodium-induced mouse colitis model, h-BSA-Fe+EcN demonstrated excellent therapeutic efficacy, reducing disease activity index and restoring colonic architecture. This strategy addresses the dual challenges of fluid perfusion and rapid ROS-responsive gelation, offering an advanced transanal treatment for UC.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4091-4
Perovskite photovoltaics offer exceptional promise for next-generation solar energy, yet their commercialization is impeded by a critical scalability-stability gap: scalable solution-processed coating methods introduce distinct fluid dynamics and crystallization kinetics, yielding varied film morphologies and unstable degradation behaviors. This review addresses this challenge by re-examining stability exclusively through scalable solution-based fabrication. Degradation mechanisms in scalable processing are dissected, emphasizing precursor ink design—solute purity, ink aging, and solvent engineering—which collectively govern film uniformity and reproducibility. Intrinsic instabilities exacerbated under scalable processing are analyzed via crystal and compositional design, defect generation and passivation, and ion migration in large-area devices. Stable device architectures suitable for scalable manufacturing are explored, comparing n-i-p and p-i-n configurations and advancements in charge transport layers. Encapsulation is critically evaluated as the ultimate barrier for commercial modules, covering scalable techniques and material selections, alongside an assessment of operational stability under real-world environments including moisture ingress, thermal cycling, and UV-induced degradation. By integrating these insights, this review establishes a holistic framework for co-designing process scalability and operational longevity, outlining a coherent pathway toward durable and commercially viable perovskite solar modules.