Electroluminescent Properties of an Electrochemically Cross‐Linkable Carbazole Peripheral Poly(Benzyl Ether) Dendrimer |
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| Authors: | Dr Jin Young Park Dong‐Eun Kim Dr Ramakrishna Ponnapati Prof Jong‐Min Kim Prof Young‐Soo Kwon Prof Rigoberto C Advincula |
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| Institution: | 1. Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, TX 77204 (USA), Fax: (+1)?713‐743‐1755;2. Department of Electrical Engineering, Dong‐A University, Hadan‐dong, Saha‐gu, Busan, 604‐774 (Republic of Korea);3. Department of Chemical Engineering, Dong‐A University, Hadan‐dong, Saha‐gu, Busan, 604‐774 (Republic of Korea) |
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| Abstract: | The electroluminescent (EL) properties of a cross‐linkable carbazole‐terminated poly(benzyl ether) dendrimer, G3‐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 G3‐cbz DN) and electron‐transporting oxadiazole (PBD). Two excited states (exciplex and electroplex) generated at the interfaces of PVK/G3‐cbz DN and PBD result in competitive emission, exhibiting a broad band in the EL spectra. |
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| Keywords: | dendrimers electrochemistry luminescence electroplex exciplex |
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