Abstract A new deep blue fluorescent material based on carbazole-pyrene hybrid, namely PyEtCz, was synthesized by palladium catalyzed C–C Suzuki coupling reaction, and structurally characterized by NMR, mass spectra and elemental analysis. The thermal stability, photophysical and optoelectronic properties were fully investigated. The material shows good thermal stability and can form an amorphous glass state. Its CH2Cl2 solution exhibits strong deep-blue emission with high fluorescent quantum yield of 75%. PyEtCz also possesses high HOMO level of −5.48 eV that would facilitate efficient hole injection into the emitting layer. The non-doped OLED using PyEtCz as emitter through vacuum evaporation was fabricated for purpose of investigating its electroluminescence properties. The device exhibited stable blue electroluminescence with CIE coordinate of (0.15, 0.10), a good performance with maximum luminance of 6573 cd m−2 and maximum luminance efficiency of 3.24 cd A−1 (3.35%) was achieved.

中文翻译：

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用于非掺杂电致发光器件的基于咔唑-芘杂化物的高效深蓝色发光体

摘要 通过钯催化的C-C Suzuki偶联反应合成了一种基于咔唑-芘杂化物的新型深蓝色荧光材料，即PyEtCz，并通过核磁共振、质谱和元素分析对其进行了结构表征。充分研究了热稳定性、光物理和光电性能。该材料表现出良好的热稳定性，可以形成非晶玻璃态。其 CH2Cl2 溶液具有强烈的深蓝色发射，具有 75% 的高荧光量子产率。PyEtCz 还具有 -5.48 eV 的高 HOMO 能级，这将有助于将空穴有效注入发光层。使用 PyEtCz 作为发射体通过真空蒸发制造非掺杂 OLED 以研究其电致发光特性。