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含有卡巴佐基基替代二和单二的异构单核Cu (I) 化物复合物:结构和光物理和电光发光性质
Zhun Chen1, Wei Xu1, Ruiqin Zhu2
1College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P. R. China. liulihubei@hubu.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|November 7, 2024
概括
合成新型铜(I) 化物复合物与炭醇配体显著提高光发光量子产量 (PLQYs) 并缩短衰变寿命. 综合体4实现了0.75的高PLQY,证明了高效的有机发光装置的潜力.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 光物理学的光学物理学
背景情况:
- 在光电子材料中,开发具有高量子效率和短衰变寿命的异构单核铜 (I) 化物复合体是一个重大挑战.
- 现有的铜 (I) 复合体往往难以平衡高光发光量子产量 (PLQYs) 与快速激发状态衰变.
研究的目的:
- 合成和描述新型单核四坐标铜 (((I) 化物复合物,其中包含基于卡巴佐尔的配体.
- 研究连接物修饰对光物理性质的影响,特别是光发光量子产量 (PLQYs) 和激发状态衰变寿命.
- 评估这些复杂物在溶液加工有机发光器件 (OLED) 中的性能.
主要方法:
- 合成七个单核四坐标Cu(I) 化物复合物: [CuX(DCzDP) ((PPh3) ], [CuX ((DCzDP) ((CzP)) 和 [CuX ((DCzDP) ((DCzP)) ],其中X = Br,Cl,I和体包括DCzDP,PPh3,CzP和DCzP.
- 合成复合物的表征使用结构分析和室温光物理测量 (排放光谱,PLQY,衰变寿命).
- 使用合成的铜 (I) 复合物,特别是复合物4的溶液加工OLED的制造和测试.
主要成果:
- 所有合成的复合物 (1-7) 在黄绿至黄绿区域 (λem = 531-560 nm) 呈现延迟光,具有中度至高的PLQY (Φ = 0.34-0.75) 和短衰变寿命 (τ = 1.8-2.9 μs).
- 将PPh3中的基替换为9-甲基-3-基基组有效地增强了PLQY,并维持了约2.0μs的短衰变寿命.
- 复合体4显示出最高的PLQY (0.75) 和短的衰变寿命 (1.9μs),具有高的辐射衰变速率 (kr = 3.95 × 10^5 s^-1),与Ir (III) 复合体相比较. 具有复合 4 的 OLED 实现了 6.56% 的 EQE 和 3364 cd m^-2 的亮度.
结论:
- 在异构分子单核Cu (I) 化物复合体中对连接体的修饰是一种可行的策略,可以实现高光发光量子效率和短衰变寿命.
- 合成的复合物,特别是复合物4,在高效和稳定的有机发光器件中显示出有前途的性能.
- 实现的高辐射衰变率使得这些铜复合物在OLED技术中成为传统发射器的竞争性替代品.
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