We have fabricated chiral WS2 rolls that utilize a chiral superstructure to address the lack of chirality in traditional two-dimensional materials. This structure exhibits responsiveness to both linearly polarized light and circularly polarized light. This unique combination enables the development of circular/linear polarization-sensitive photodetectors. Our data demonstrate that chiral WS2 rolls exhibit robust linear/circular polarization responsiveness. Compared to traditional circular/linear polarization-sensitive photodetectors, this approach simplifies device fabrication and miniaturization, making it a promising optoelectronic material. The ability to effectively detect both linearly polarized light (LPL) and circularly polarized light (CPL) enhances the versatility of these devices, paving the way for innovative applications in optical sensing and communication. Overall, chiral WS2 rolls represent a significant advancement in the field of optoelectronics, offering potential improvements in performance and functionality.
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Flexible thermoelectric generators (f-TEGs) can directly convert low-grade thermal energy from the human body and surrounding environment into electricity, showing great promise for wearable power systems and self-sustained sensors. However, conventional inorganic thermoelectric materials still face significant constraints in balancing flexibility, structural stability, and energy conversion efficiency. In this work, high-performance Bi2Te3/hydroxypropyl methylcellulose (HPMC)@paper composite thermoelectric films were fabricated via a vacuum filtration method, realizing a synergistic enhancement in both flexibility and thermoelectric performance. The obtained p-type and n-type films exhibited Seebeck coefficients of 182.96 and −229.98 μV·K−1, respectively, and maintained stable output under repeated bending. Based on these films, both planar and multilayer stacked f-TEG architectures were designed to achieve multidimensional energy harvesting. The Level-III stacked f-TEG reached an ultrahigh device-level Seebeck coefficient (Sdevice) of 11,330.25 μV·K−1 and a maximum output power of 617.4 nW, demonstrating outstanding conversion capability and structural robustness. When integrated with an Ecoflex substrate, the device maintained stable operation under bending, twisting, and conformal attachment to curved surfaces. A smart wristband built from this system continuously drove a low-power pedometer during human-wear testing, validating its feasibility for wearable thermoelectric energy harvesting. This study proposes an inorganic–organic hybrid thermoelectric film design that combines high flexibility with excellent thermoelectric performance, offering a new strategy for flexible energy devices and showing broad prospects in wearable electronics.
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