Abstract 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN) based fluorescent blue organic light-emitting diodes (OLEDs) are demonstrated. With MADN as emitting layer, experiments indicate that thick MADN (40–60 nm) is preferable for constructing efficient blue OLED. With MADN as hole-transport and emitting layer and tris(8-hydroxy-quinolinato)aluminium (Alq 3 ) as electron-transport layer, the OLED electroluminescent characteristics show a mixture emission of MADN and Alq 3 with Commission Internationale d'Eclairage (CIE) color coordinates of (0.25, 0.34), indicating feasible hole transporting in MADN. Using 4,7-diphenyl-1,10-phenanthroline (BPhen) replacing Alq 3 as electron-transport layer, the OLED shows deep blue emission with a maximum luminous efficiency of 4.8 cd/A and CIE color coordinates of (0.16, 0.09). The hole transport characteristics of MADN are further clarified by constructing hole-only device and performing impedance spectroscopy analysis. The results indicate that MADN shows superior hole-transport ability which is almost comparable to typical hole-transport material of N , N ′-bis(naphthalen-1-yl)- N , N ′-bis(phenyl)-benzidine (NPB), suggesting a promising application for constructing efficient blue OLED with integrated hole-transport layer and emitting layer.

中文翻译：

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2-甲基-9,10-双(萘-2-基)蒽作为空穴传输发射层的蓝色有机发光二极管及阻抗谱分析

摘要 展示了基于 2-甲基-9,10-双（萘-2-基）蒽（MADN）的荧光蓝色有机发光二极管（OLED）。以 MADN 作为发光层，实验表明厚的 MADN (40-60 nm) 更适合构建高效的蓝色 OLED。MADN作为空穴传输和发光层，三（8-羟基-喹啉）铝（Alq 3 ）作为电子传输层，OLED电致发光特性显示MADN和Alq 3 的混合发射与Commission Internationale d'Eclairage（CIE） ) (0.25, 0.34) 的颜色坐标，表明 MADN 中可行的空穴传输。使用 4,7-二苯基-1,10-菲咯啉 (BPhen) 代替 Alq 3 作为电子传输层，OLED 显示深蓝色发射，最大发光效率为 4.8 cd/A，CIE 色坐标为 (0.16, 0.09) . 通过构建仅空穴器件并进行阻抗谱分析，进一步阐明了 MADN 的空穴传输特性。结果表明，MADN 显示出优异的空穴传输能力，几乎可与典型的 N , N '-双(萘-1-基)- N , N '-双(苯基)-联苯胺 (NPB) 空穴传输材料相媲美，表明构建具有集成空穴传输层和发光层的高效蓝色 OLED 的有前景的应用。