Amino N‐Oxide Functionalized Conjugated Polymers and their Amino‐Functionalized Precursors: New Cathode Interlayers for High‐Performance Optoelectronic Devices
Amino N‐Oxide Functionalized Conjugated Polymers and their Amino‐Functionalized Precursors: New Cathode Interlayers for High‐Performance Optoelectronic Devices
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DOI：
10.1002/adfm.201200199
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发表时间：
2012-07
影响因子：
19
通讯作者：
Xing Guan;Kai Zhang;F. Huang;G. Bazan;Yong Cao
中科院分区：
文献类型：
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作者：
Xing Guan;Kai Zhang;F. Huang;G. Bazan;Yong Cao
用过氧化氢氧化氨基功能化前体聚合物（PNs），合成了一系列氨基N -氧化物功能化聚芴均聚物和共聚物（PNOs）。PNOs在极性溶剂中的良好溶解度和高功功能金属的良好电子注入使其成为溶液处理多层聚合物发光二极管（PLEDs）和聚合物太阳能电池（PSCs）界面改性的良好候选者。pno和PNs都用作led和psc的阴极中间层。结果表明，所制备的器件比裸铝阴极器件具有更好的性能。研究了侧链和主链的变化对器件性能的影响。PNOs/Al阴极器件性能优于PNs/Al阴极器件。此外，含有吡啶基对链聚合物的器件比含有元链聚合物的器件表现出更好的性能。利用聚[(2,7‐（9,9‐双（6‐（N，N‐二乙基氨基）‐己基N -氧化物）芴）‐alt‐（2,5‐吡啶基）]（PF6NO25Py）阴极中间层，该器件的发光效率为16.9 cd a−1，led和psc的功率转换效率分别为6.9%。这些结果表明，PNOs是一种很有前途的新型阴极中间层，可用于修饰一系列光电器件。
A series of amino N‐oxide functionalized polyfluorene homopolymers and copolymers (PNOs) are synthesized by oxidizing their amino functionalized precursor polymers (PNs) with hydrogen peroxide. Excellent solubility in polar solvents and good electron injection from high work‐function metals make PNOs good candidates for interfacial modification of solution processed multilayer polymer light‐emitting diodes (PLEDs) and polymer solar cells (PSCs). Both PNOs and PNs are used as cathode interlayers in PLEDs and PSCs. It is found that the resulting devices show much better performance than devices based on a bare Al cathode. The effect of side chain and main chain variations on the device performance is investigated. PNOs/Al cathode devices exhibit better performance than PNs/Al cathode devices. Moreover, devices incorporating polymers with para‐linkage of pyridinyl moieties exhibit better performance than those using polymers with meta‐linked counterparts. With a poly[(2,7‐(9,9‐bis(6‐(N,N‐diethylamino)‐hexyl N‐oxide)fluorene))‐alt‐(2,5‐pyridinyl)] (PF6NO25Py) cathode interlayer, the resulting device exhibits a luminance efficiency of 16.9 cd A−1 and a power conversion efficiency of 6.9% for PLEDs and PSCs, respectively. These results indicate that PNOs are promising new cathode interlayers for modifying a range of optoelectronic devices.