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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Synthesis and characterization of color tunable, highly electroluminescent copolymers of polyfluorene by incorporating the N-phenyl-1,8-naphthalimide moiety into the main chain
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Synthesis and characterization of color tunable, highly electroluminescent copolymers of polyfluorene by incorporating the N-phenyl-1,8-naphthalimide moiety into the main chain

机译：通过将N-苯基-1,8-萘二甲酰亚胺基团掺入主链中来合成和表征聚芴的颜色可调的高电致发光共聚物

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摘要

A series of six new organic light emitting copolymers were prepared from 9,9'-dioctylfluorene (DOF) and N-phenyl-1,8-naphthalimide (NPN) using palladium catalysed Suzuki polymerization. The feed ratios of poly[2,7-(9,9'-dioctylfluorene)-co-N-phenyl-1,8-naphthalimide] (PFONPN) copolymers were 50 : 50, 65 : 35, 75 : 25, 90 : 10, 95 : 05 and 99 : 01 respectively. These copolymers have good thermal stability with an onset decomposition temperature (T-d) of similar to 340-405 degrees C and a glass transition temperature (T-g) of 123-134 degrees C. All the copolymers are highly fluorescent and soluble in common organic solvents such as chlorobenzene, chloroform, dichloromethane, THF, toluene, etc. allowing their processing from desired solvent. The electroluminescence (EL) properties of the copolymers were also studied by fabricating single layer devices with ITO/PEDOT:PSS/PFONPN/Ca:Al configuration. The PL and the EL spectra of the copolymers reveal that by changing the content of the NPN moiety in the polyfluorene main chain from 1 to 50 mol%, the emission color of the polymers can be tuned from blue to green with Commission International de l'Echairage (CIE) coordinates being (0.17, 0.22) to (0.24, 0.49). This color tuning can be attributed to the strong energy transfer from the fluorene to NPN unit in the polymer backbone. The devices made using these copolymers are found to be very bright with PFONPN01 giving the highest brightness of 5236 cd m(-2) with a luminous efficiency of 3.52 cd A(-1)
机译：使用钯催化的Suzuki聚合反应，由9,9'-二辛基芴（DOF）和N-苯基-1,8-萘二甲酰亚胺（NPN）制备了一系列六种新的有机发光共聚物。聚[2,7-（9,9'-二辛基芴）-co-N-苯基-1,8-萘二甲酰亚胺]（PFONPN）共聚物的进料比为50：50、65：35、75：25、90：分别为10、95：05和99:01。这些共聚物具有良好的热稳定性，起始分解温度（Td）约为340-405摄氏度，玻璃化转变温度（Tg）约为123-134摄氏度。所有共聚物均具有高荧光性，可溶于常见的有机溶剂，例如例如氯苯，氯仿，二氯甲烷，THF，甲苯等，可以用所需溶剂进行处理。还通过制造具有ITO / PEDOT：PSS / PFONPN / Ca：Al构型的单层器件来研究共聚物的电致发光（EL）性能。共聚物的PL和EL光谱表明，通过将聚芴​​主链中NPN部分的含量从1 mol％更改为50 mol％，可以使用Commission International de l'将聚合物的发射颜色从蓝色调整为绿色。椅子（CIE）坐标为（0.17，0.22）至（0.24，0.49）。这种颜色调节可归因于从芴到聚合物主链中NPN单元的强大能量转移。发现使用这些共聚物制得的设备非常亮，PFONPN01的亮度最高，为5236 cd m（-2），发光效率为3.52 cd A（-1）。

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