Conjugated Polyelectrolyte Blend with Polyethyleneimine Ethoxylated for Thickness-Insensitive Electron Injection Layers in Organic Light-Emitting Devices,ACS Applied Materials & Interfaces

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Conjugated Polyelectrolyte Blend with Polyethyleneimine Ethoxylated for Thickness-Insensitive Electron Injection Layers in Organic Light-Emitting Devices
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-05-01 00:00:00 , DOI: 10.1021/acsami.8b00752
Satoru Ohisa , Tetsuya Kato , Tatsuya Takahashi , Michinori Suzuki , Yukihiro Hayashi , Tomoyuki Koganezawa ₁ , Christopher R. McNeill ₂ , Takayuki Chiba , Yong-Jin Pu , Junji Kido

Affiliation

Electron injection layers (EILs) based on a simple polymer blend of polyethyleneimine ethoxylated (PEIE) and poly[(9,9-bis(3′-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN-Br) can suppress the dependence of organic light-emitting device (OLED) performance on thickness variation compared with single PEIE or PFN-Br EILs. PEIE and PFN-Br were compatible with each other and PFN-Br uniformly mixed in the PEIE matrix. PFN-Br in PEIE formed more fluorene–fluorene pairs than PFN-Br alone. In addition, PEIE:PFN-Br blends reduced the work function (WF) substantially compared with single PEIE or PFN-Br polymer. PEIE:PFN-Br blends were applied to EILs in fluorescent polymer-based OLEDs. Optimized PEIE:PFN-Br blend EIL-based devices presented lower driving voltages and smaller dependences of device performance on EIL thickness than single PEIE or PFN-Br-based devices. These improvements were attributed to electron-transporting fluorene moieties, increased fluorene–fluorene pairs working as channels of electron transport, and the large WF reduction effect of PEIE:PFN-Br blends.

中文翻译：

用于有机发光器件中对厚度不敏感的电子注入层的共轭聚电解质共混物与乙氧基化的聚乙烯亚胺的共混物

基于聚乙烯亚胺乙氧基化（PEIE）和聚[（9,9-双（3'-（（N，N-二甲基）-N-乙基铵）-丙基）-2， 7-芴）-alt与单个PEIE或PFN-Br EIL相比，-2,7-（9,9-二辛基芴）]（PFN-Br）可以抑制有机发光器件（OLED）性能对厚度变化的依赖性。PEIE和PFN-Br彼此相容，并且PFN-Br均匀混合在PEIE基质中。PEIE中的PFN-Br比单独的PFN-Br形成更多的芴-芴对。此外，与单一PEIE或PFN-Br聚合物相比，PEIE：PFN-Br共混物大大降低了功函数（WF）。PEIE：PFN-Br共混物应用于基于荧光聚合物的OLED中的EIL。经过优化的PEIE：PFN-Br混合EIL基器件比单个PEIE或PFN-Br基器件具有更低的驱动电压和更低的器件性能对EIL厚度的依赖性。这些改进归因于电子传输芴部分，

更新日期：2018-05-01

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