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Antimony selenide (Sb₂Se₃) has excellent directional optical and electronic behaviors due to its quasi‐1D nanoribbons structure. The photovoltaic performance of Sb₂Se₃solar cells largely depends on the orientation of the nanoribbons. It is desired to grow these Sb₂Se₃ribbons normal to the substrate to enhance photoexcited carrier transport. Therefore, it is necessary to develop a strategy for the vertical growth of Sb₂Se₃nanoribbons to achieve high‐efficiency solar cells. Since antimony sulfide (Sb₂S₃) and Sb₂Se₃are from the same space group (Pbnm) and have the same crystal structure, herein an ultrathin layer (≈20 nm) of Sb₂S₃has been used to assist the vertical growth of Sb₂Se₃nanoribbons to improve the overall efficiency of Sb₂Se₃solar cell. The Sb₂S₃thin layer deposited by the hydrothermal process helps the Sb₂Se₃ribbons grow normal to the substrate and increases the efficiency from 5.65% to 7.44% through the improvement of all solar cell parameters. This work is expected to open a new direction to tailor the Sb₂Se₃grain growth and further develop the Sb₂Se₃solar cell in the future.

Microelectrodes are widely used as a peripheral nerve interface (PNI) to connect the peripheral nerve to a computer for restoration of sensorimotor function and bionic device motion control. Materials used for implantable microelectrode are still facing the challenges from biocompatibility and bio‐fidelity in neural signal recording and nerve stimulating. In this study, we report that carbon multi‐electrode arrays (cMEAs) can be fabricated using carbon ink, micro resin dimethylsiloxane and 3D printing technology and ink for PNI. In vitro cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) demonstrated that the cMEAs have higher charge storage capacity (CSC) and less impedance than conventional platinum (Pt) electrode. In vivo studies using an animal model demonstrated that cMEAs are more effective in stimulating the nerve to elicit muscle contraction and recording compound muscle action potentials (CMAPs) than the Pt electrode. The cMEAs has lower stimulating threshold to elicit muscle activity, higher signal‐to‐noise (SNR) in CMAP. Our studies demonstrate that cMEAs can be an advanced healthcare materials in nerve signal nerve stimulation for PNI and muscle bioelectrical signal recording for peripheral muscle interface (PMI).