Dual-functional additive of cesium ion for achieving ultrahigh efficiency of persistent phosphorescence in existing polymer-based materials

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Science China Chemistry Pub Date : 2024-10-22 DOI:10.1007/s11426-024-2247-4

Yao Liu, Jinzheng Chen, Yiling Miao, Kaimin Zhang, Faxu Lin, Huahua Huang, Lina Zhang, Zhan Yang, Yi Zhang, Zhenguo Chi, Zhiyong Yang

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Abstract

Despite great achievements obtained for polymer-based room-temperature phosphorescence (RTP) materials, the limited efficiencies of persistent RTP still hinder their development. Herein, a simple and universal strategy of using the dual-functional additive of Cs⁺ was presented, which could simultaneously enhance the efficiency (Φ_p) and maintain the long lifetime (τ_p) of RTP in existing polymer-based systems with various phosphors and polymers. Among them, the commercial emitter (TpB)-doped polyvinyl alcohol (PVA)/Cs₂CO₃ system possessed an extremely high Φ_p up to 75.5% and still maintained a long τ_p of 2.13 s, by introducing the heavy-atom effect and an extra network of ionic bonding through the Cs⁺ additive. Additionally, the temperature resistance of RTP in TpB@PVA/Cs⁺ film could also be improved to 85 °C. More satisfactorily, the efficiency of Förster resonance energy transfer (FRET) from RTP to near-infrared (NIR) was also remarkably enhanced in the multi-component systems. This work provides a simple and universal strategy for developing polymer systems with high RTP performance.

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用于在现有聚合物基材料中实现超高效持久磷光的铯离子双功能添加剂

尽管聚合物基室温磷光（RTP）材料取得了巨大的成就，但持久性 RTP 的有限效率仍然阻碍着其发展。本文提出了一种使用 Cs+ 双功能添加剂的简单而通用的策略，该策略可同时提高现有聚合物基体系中各种荧光粉和聚合物的 RTP 效率（Φp）并保持长寿命（τp）。其中，商业发射体（TpB）掺杂聚乙烯醇（PVA）/Cs2CO3 系统通过引入重原子效应和额外的 Cs+ 添加剂离子键网络，拥有高达 75.5% 的超高 Φp 值，并仍能保持 2.13 秒的长 τp 寿命。此外，TpB@PVA/Cs+ 薄膜中 RTP 的耐温性也提高到了 85 ℃。更令人满意的是，在多组分体系中，从 RTP 到近红外（NIR）的佛斯特共振能量转移（FRET）效率也显著提高。这项工作为开发具有高 RTP 性能的聚合物体系提供了一种简单而通用的策略。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.