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N-annelated perylenes as effective green emitters for OLEDs

机译：N-退火的per为OLED的有效绿色发射极

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摘要

New carbazole-substituted N-annelated perylenes with different linking topologies of the chromophores were synthesized and their physical properties were studied with various experimental techniques including thermogravimetric analysis, differential scanning calorimetry, UV-vis, fluorescence and photoelectron emission spectroscopies and cyclic voltammetry. The synthesized materials exhibit extremely high thermal stability with 5% weight loss temperatures ranging from 400 to 457 degrees C. Photoluminescence quantum yields of the solid films of the compounds range from 33 to 51%. The ionization potentials of the solid samples established by the electron photoemission technique were found to be in the range of 5.14-5.53 eV. Using the newly synthesized compounds as emissive materials, efficient organic light-emitting diodes (OLEDs) were fabricated with the emission pattern covering the broad visible region from 475 to 675 nm. Bright green OLEDs exhibited luminance exceeding 62 000 cd m(-2) and external quantum efficiency reaching 4.2%.
机译：合成了具有不同生色团连接拓扑结构的新的咔唑取代的N-退火的二萘嵌苯，并通过热重分析，差示扫描量热法，紫外可见光谱，荧光和光电子发射光谱以及循环伏安法等多种实验技术研究了它们的物理性质。合成的材料显示出极高的热稳定性，其中5％的失重温度为400至457摄氏度。化合物的固体膜的光致发光量子产率为33％至51％。通过电子光发射技术建立的固体样品的电离电势被发现在5.14-5.53eV的范围内。使用新合成的化合物作为发光材料，制备了有效的有机发光二极管（OLED），其发射图案覆盖了475至675 nm的宽可见区。亮绿色OLED的亮度超过62000 cd m（-2），外部量子效率达到4.2％。

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