系统间交叉
量子产额
材料科学
磷光
碳化
纳米技术
聚合物
激发态
纳米团簇
光化学
光致发光
量子点
光电子学
化学
单重态
复合材料
光学
原子物理学
荧光
物理
扫描电子显微镜
作者
Qipeng Zhang,Shihao Xu,Lanpeng Zhang,Liang Yang,Changlong Jiang
标识
DOI:10.1002/advs.202400781
摘要
Abstract Advancing a metal‐free room temperature phosphorescent (RTP) material that exhibits multicolor emission, remarkable RTP lifetime, and high quantum yield still faces the challenge of achieving intersystem crossing between singly and triplet excited states, as well as the rapid decay of triplet excited states due to nonradiative losses. In this study, a novel strategy is proposed to address these limitations by incorporating o‐phenylenediamine, which generates multiple luminescent centers, and long‐chain polyacrylic acid to synthesize carbonized polymer dots (CPDs). These CPDs are then embedded in a rigid B 2 O 3 matrix, effectively limiting nonradiative losses through the synergistic effects of polymer cross‐linking and the rigid matrix. The resulting CPD‐based materials exhibit remarkable ultralong phosphorescence in shades of blue and lime green, with a visible lifetime of up to 49 s and a high phosphorescence quantum yield. Simultaneously, this study demonstrates the practical applicability of these excellent material properties in anti‐counterfeiting and information encryption.
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