Abstract In this work, a water/alcohol-soluble conjugated polymer poly [(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9–dihexylfluorene)] (PFNC6) is synthesized and the photophysical properties are investigated. Subsequently, it is tested as electron injection layer in a blue emitting OLED with PFO. The maximum current efficiency (CE) and external quantum efficiency (EQE) of the device increased by 3 times to 0.75 cd/A and 0.66%. Further enhancement in the OLED performance is obtained when a bilayer electron injection consisting of PFNC6 and LiF are used where the maximum CE is 2.16 cd/A and the maximum EQE is 1.55%. Measurement with electron-only-devices confirmed that the electron mobility is increased for the device with PFNC6 as compared to the control device. Furthermore, higher Vbi is obtained in photovoltaic measurement when PFNC6 is used. As a result, the electron injection barrier is reduced and electron injection is more efficient.

中文翻译：

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以水溶性/醇溶性共轭聚合物作为电子注入层增强蓝色 OLED 的性能

摘要 在这项工作中，一种水溶性/醇溶性共轭聚合物聚 [(9,9-bis(3'-(N,N-二甲氨基)丙基)-2,7-芴)-alt-2,7-(9 ,9-二己基芴)] (PFNC6) 被合成并研究了光物理性质。随后，它在具有 PFO 的蓝色发光 OLED 中作为电子注入层进行测试。该器件的最大电流效率（CE）和外量子效率（EQE）提高了 3 倍，达到 0.75 cd/A 和 0.66%。当使用由 PFNC6 和 LiF 组成的双层电子注入时，OLED 性能进一步增强，其中最大 CE 为 2.16 cd/A，最大 EQE 为 1.55%。使用纯电子器件的测量证实，与对照器件相比，具有 PFNC6 的器件的电子迁移率增加。此外，当使用 PFNC6 时，在光伏测量中获得更高的 Vbi。结果，电子注入势垒降低并且电子注入更有效。