ZnS is one of the typical representative materials of II-VI direct bandgap semiconductors, and its photoluminescence (PL), mechanoluminescence (ML), and electroluminescence (EL) have already been extensively studied. Herein, ZFP + PU/PVDF composite fibers based on ZnS:Cu phosphors were fabricated for low-temperature lighting monitoring sensor devices, whose long-afterglow luminescent light-emitting process went from slowly brighter to slowly dim as the temperature changed. Impressively, the shell-core structure of ZnS doped with PVDF-HFP particles (ZFP particles) can enhance the light intensity duration by up to 100 s. Different from the pure ZnS:Cu phosphors, the luminescence mechanism of ZFP particles was the synergy of the piezoelectric effect in addition to the stimulating effect of temperature. Otherwise, using PU/PVDF as a substrate can endow the fiber with good flexibility, elasticity, and mechanical properties. Then, to confirm whether the shape changes affect the luminescence, the device of the ropes and fabrics woven by the fibers were further characterized. The results suggested that the tightness of the devices was an extrinsic factor influencing luminous intensity. In summary, this study presents a new luminescence concept with profound research prospects.

ZnS是II-VI族直接带隙半导体的典型代表材料之一，其光致发光（PL）、机械致发光（ML）和电致发光（EL）已被广泛研究。在此，基于 ZnS:Cu 荧光粉的 ZFP + PU/PVDF 复合纤维被制造用于低温照明监测传感器装置，其长余辉发光过程随着温度的变化从缓慢变亮变为缓慢变暗。令人印象深刻的是，掺杂 PVDF-HFP 颗粒（ZFP 颗粒）的 ZnS 的壳核结构可以将光强持续时间提高多达 100 秒。与纯ZnS:Cu荧光粉不同，ZFP粒子的发光机理除了温度的刺激作用外，还有压电效应的协同作用。除此以外，以PU/PVDF为基材可以赋予纤维良好的柔韧性、弹性和机械性能。然后，为了确认形状变化是否影响发光，进一步表征了由纤维编织的绳索和织物的装置。结果表明，器件的密封性是影响发光强度的外在因素。综上所述，本研究提出了一个具有深远研究前景的新型发光概念。