Prof. Qingyu Wang | Publications & Academic Profile | SinoGreenTech

Research Publications & English Decoded Briefs

Showing 3 publications

SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3615-1

LEGO-like Three-Dimensional Integrated Stretchable Electronics

Stretchable electronics are pivotal for bio-integrated devices, soft robotics, and wearables, yet their development is constrained by single-layer architectures that limit integration density and by mechanical mismatch between rigid components and soft substrates, which curtails service life. Here, we introduce a LEGO-like modular assembly strategy to construct multilayer three-dimensional (3D) stretchable electronics. Electronic components (ECs) and self-healing polyurethane (SPU) substrates patterned with liquid metal (LM) circuits serve as the modular blocks. This design simplifies fabrication and markedly enhances 3D integration density. The combination of LM circuits and self-healing elastic substrates enables devices to withstand diverse deformations and to autonomously heal after mechanical damage. Notably, the devices can undergo multiple recycling and reuse cycles without significant performance loss. This methodology offers a new paradigm for advanced flexible electronics, addressing critical bottlenecks in integration density, mechanical robustness, and sustainability.

Read Full Analysis→Download Authentic PDF

SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3725-1

Key roles of Young’s modulus and mechanical hysteresis in hydrogel strain sensors for high-fidelity sensing

Conductive hydrogel-based stretchable electronics have been extensively investigated, with strain sensors being the most prominently studied. While mechanical properties significantly affect device performance, the systematic correlation between specific mechanical parameters and sensing performance remains rarely explored. This work compares the influences of Young’s modulus and mechanical hysteresis on sensing performance between highly entangled PAM-Li and double-network PAM-Li-Agar-3 strain sensors. Owing to the brittle agar network, which imparts a higher Young’s modulus and pronounced mechanical hysteresis to the double-network PAM-Li-Agar-3 hydrogel, the corresponding sensor requires a greater driving force for deformation and yields signals with poor reproducibility. In contrast, the PAM-Li hydrogel, characterized by highly entangled polymer chains, exhibits a lower Young’s modulus and negligible mechanical hysteresis. Consequently, signals from the PAM-Li strain sensor demonstrate enhanced sensitivity and stability. Therefore, this work demonstrates that a low Young’s modulus and minimal mechanical hysteresis are critical factors for achieving superior sensing performance in strain sensors, as systematically validated through comparative analyses across diverse application scenarios.

Read Full Analysis→Download Authentic PDF

SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3418-5

Funnel-shaped precursor engineering for high-performance flexible perovskite photodetectors

Flexible photodetector arrays are critical for artificial retina prosthetics, yet their performance is limited by electrode discontinuities and incomplete perovskite crystallization under mechanical stress. This study introduces a funnel-shaped precursor engineering strategy to fabricate high-performance flexible perovskite photodetectors. An ultrathin platinum electrode film (UTPF) of less than 10 nm thickness is deposited via radio frequency magnetron sputtering combined with angular ion beam polishing, achieving an ultra-smooth surface. A vapor deposition method with dynamically regulated evaporation rates produces a dense-gradient PbI2 precursor with a funnel-shaped vertical structure, facilitating CH3NH3I solution penetration and yielding a dense, uniform perovskite film with large grains and strong interfacial bonding to the UTPF. The resulting devices exhibit a high detectivity of 19.48×10^12 Jones, an on/off current ratio of 6.87×10^4, and retain 92.53% of the original photocurrent after 4000 bending cycles at large angles. Integrated 10×10 flexible photodetector arrays demonstrate uniform dark current and photocurrent, along with high imaging resolution, confirming reliable imaging capabilities. This work addresses the mechanical and crystallization bottlenecks of flexible perovskite photodetectors, offering a viable route for artificial retina and wearable optoelectronic applications.

Read Full Analysis→Download Authentic PDF