標題: A new organic/inorganic electroluminescent material with a silsesquioxane core
作者: Cheng, Chih-Chia
Chien, Chen-Han
Yen, Ying-Chieh
Ye, Yun-Sheng
Ko, Fu-Hsiang
Lin, Chun-Hung
Chang, Feng-Chih
材料科學與工程學系奈米科技碩博班
應用化學系
Graduate Program of Nanotechnology , Department of Materials Science and Engineering
Department of Applied Chemistry
關鍵字: Polymer matrix composites;Nanocomposite;Optical materials;Blending
公開日期: 1-Apr-2009
摘要: This paper describes a new polyhedral oligomeric silsesquioxane (POSS)-based blue-light electroluminescent nanoparticle, octakis[N-(9-ethyl-9-H-carbazol-3-yl)undecanamide-11-dimethylsiloxy]silsesquioxane (POSS-C11-Cz), which contains eight carbazole chromophore arms, synthesized through the hydrosilation reaction of octakis(dimethylsiloxy)silsesquioxane with the terminal olefin Cz-C11ene. POSS-C11-Cz exhibits good thermal and electrochemical stabilities and good film-forming properties. The optical and photoluminescence spectra of POSS-C11-Cz in solution and in the solid state indicate a reduction in the degrees of aggregation and excimer formation because inter-chain interactions were prohibited by the bulky POSS core. Moreover, photoluminescence spectra of a POSS-C11-Cz (3 wt.%,)/polyfluorene (97 blend revealed that the color was stable after heating the sample at 200 degrees C for 5 h; in contrast, the pure polyfluorene exhibited a significant green emission at 530 nm. A triple-layer device based on this blend exhibited higher maximum brightness and luminance efficiencies relative to those of the pure polyfluorene. Thus, the organic/inorganic POSS-C11-Cz/polyfluorene blend has potential for use in polymeric light-emitting diodes because of its improved thermal and optoelectronic characteristics. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
URI: http://dx.doi.org/10.1016/j.actamat.2008.12.031
http://hdl.handle.net/11536/7394
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2008.12.031
期刊: ACTA MATERIALIA
Volume: 57
Issue: 6
起始頁: 1938
結束頁: 1946
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