Department of Chemistry, University of Houston, Houston, TX 77204, USA.
Chemphyschem. 2011 Apr 4;12(5):1010-5. doi: 10.1002/cphc.201000785. Epub 2011 Mar 8.
The electroluminescent (EL) properties of a cross-linkable carbazole-terminated poly(benzyl ether) dendrimer, G(3)-cbz DN, doped into a PVK:PBD host matrix with a double-layer device configuration are investigated. Different concentrations of the guest material can control device efficiency, related to chromaticity of white emission and the origin of excited-state complexes occurring between hole-transporting carbazole units (PVK or G(3)-cbz DN) and electron-transporting oxadiazole (PBD). Two excited states (exciplex and electroplex) generated at the interfaces of PVK/G(3)-cbz DN and PBD result in competitive emission, exhibiting a broad band in the EL spectra.
研究了一种可交联咔唑端基聚（苯醚）树枝状大分子 G(3)-cbz DN 掺杂到具有双层器件结构的 PVK:PBD 主体基质中的电致发光（EL）性质。不同浓度的客体材料可以控制器件效率，这与白色发射的色度有关，并且与空穴传输咔唑单元（PVK 或 G(3)-cbz DN）和电子传输恶二唑（PBD）之间的激发态复合物的起源有关。在 PVK/G(3)-cbz DN 和 PBD 的界面处产生的两种激发态（激基复合物和电子给体-受体复合物）产生竞争发射，在 EL 光谱中表现出宽带。
