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1.苏州大学 光电科学与工程学院, 江苏 苏州 215006
2.苏州大学 物理科学与技术学院, 江苏 苏州 215006
3.苏州大学 功能纳米与软物质研究院, 江苏 苏州 215123
Received:20 February 2026,
Revised:2026-02-28,
Published:05 March 2026
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ZHANG Shirui, XIE Jinfeng, TANG Wentao, et al. CsPbBr3@PZS composites constructed
ZHANG Shirui, XIE Jinfeng, TANG Wentao, et al. CsPbBr3@PZS composites constructed
全无机CsPbBr
3
钙钛矿量子点因其优异的光学特性在新型显示领域展现出巨大潜力,但表面缺陷与离子迁移导致的环境不稳定性严重制约其应用。尽管聚合物包覆可提升其稳定性,但发光衰减和分散性不足仍是制约复合材料性能的关键问题。本文提出一种原位缓慢缩聚法,在CsPbBr
3
量子点表面构建聚磷腈(PZS)包覆层,通过温和聚合实现量子点在聚合物基体中均匀分散,并利用PZS中N、P、S等杂原子的Lewis碱配位作用钝化表面缺陷并抑制离子迁移。结果表明,复合材料的平均荧光寿命由原始样品的7.50 ns显著提升至20.92 ns,且在水、光、热等环境条件下均表现出优异的稳定性。在连续紫外光照射10 h后,其荧光保持率较初始量子点提高了34%。基于该复合材料构建的色转换器件在约520 nm处呈现窄带发射,CIE色坐标为(0.155 6,0.702 9)。本研究为开发高稳定性钙钛矿复合材料提供了新思路,并为其在高性能显示领域的应用奠定了基础。
All-inorganic CsPbBr
3
perovskite quantum dots (QDs) have demonstrated immense potential for next-generation display technologies owing to their exceptional optical properties. However, surface defects and ion migration induce environmental instability, thereby limiting their practical applications. Although polymer encapsulation can enhance stability, luminescence degradation and poor dispersion remain critical challenges for high-performance composites. In this work, an
in
-
situ
slow polycondensation strategy is proposed to construct a polyphosphazene (PZS) coating on CsPbBr
3
QDs. The mild polymerization process enables uniform dispersion of QDs within the polymer matrix, while the abundant heteroatoms (N, P, and S) in the PZS effectively passivate surface Pb
2+
defects through Lewis base coordination and suppress ion migration. As a result, the average photoluminescence (PL) lifetime is significantly prolonged from 7.50 ns for the pristine QDs to 20.92 ns for the composite, and the composites exhibit excellent stability under water, light, and thermal conditions. After continuous ultra
violet irradiation for 10 h, the PL intensity retention of the composites is improved by 34% compared to that of the pristine QDs. A prototype color-conversion device based on the composite exhibits a narrow-band emission centered at approximately 520 nm with CIE coordinates of (0.155 6, 0.702 9). This study provides a facile strategy for developing highly stable perovskite-based composites and establishes a solid foundation for their application in high-performance display technologies.
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