【摘要】 量子点（QD）荧光油墨因其可调谐发射波长和高量子产率等特性展现出广阔应用前景，但在实际应用中面临环境稳定性差、易聚集及难以规模化柔性制备等挑战。本研究通过将量子点与聚二甲基硅氧烷（PDMS）胶体溶液复合，制备出高稳定性荧光油墨，并采用丝网印刷技术，优化关键工艺参数（承印物：131μm PDMS;QD浓度：1.5mg/mL；丝网目数：420目），成功印制出柔性图案化荧光薄膜。研究表明，所得薄膜具有优异的环境稳定性和光稳定性：在25℃下分别浸入去离子水和75%乙醇溶液100min后，其发光强度分别保持初始值的75.6%和63.8%；在365nm、9W紫外光持续照射100min后，荧光强度衰减幅度低于20%。利用该薄膜在自然光下无色透明、紫外激发下可发射荧光的特性，通过丝网印刷成功制备了包括二维码和Code 93标准条形码在内的多种清晰且机器可读的荧光图案。本研究提出了一种可扩展、可靠的柔性高稳定性荧光薄膜制备方法，并为其在柔性光电器件、先进显示及安全防伪中的应用提供了可行技术方案。更多还原

【Abstract】 Quantum dot(QD)-based fluorescent inks offer high potential due to their tunable emission and high quantum yield, but their practical application suffers from poor environmental stability, aggregation, and challenges in scalable flexible fabrication. In this study, a high-stability fluorescent ink was developed by incorporating QDs into a polydimethylsiloxane(PDMS) colloidal matrix. High-performance patterned films were then obtained via systematic optimization of screen-printing parameters, with film quality governed by substrate type(131 μm PDMS), QD concentration(1.5 mg/m L), and screen mesh count(420 mesh). The optimized films exhibit outstanding environmental and photostability, retaining 75.6% of their fluorescence intensity after immersion in deionized water and 63.8% in 75% ethanol at 25℃ for 100 minutes. Under UV irradiation(365 nm, 9 W, 100 min), fluorescence intensity decreases by less than 20%. Utilizing their daylight transparency and UV-excitable luminescence, various patterns including QR codes and Code 93 standard barcodes were fabricated via screen printing with high pattern fidelity and machine readability. This study presents a scalable and reliable strategy for the fabrication of flexible, high-stability fluorescent films, supporting their integration into next-generation optoelectronic devices, advanced displays, and secure anti-counterfeiting.更多还原