Preparation and properties of oxadiazole‐containing polyacetylenes as electron transport materials |
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| Authors: | Xin Wang Shanyi Guan Hongyao Xu Xinyan Su Xuhui Zhu Chun Li |
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| Institution: | 1. College of Material Science and Engineering and State Key Laboratory of Chemical Fibers and Polymeric Materials, Donghua University, Shanghai 201620, People's Republic of China;2. School of Chemistry, Chizhou University, Chizhou 247000, People's Republic of China;3. State Key laboratory of Crystal Material, Shandong University, Jinan 250100, People's Republic of China;4. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory SPA‐OXAcial Functional Materials, MOE, South China University of Technology, Guangzhou 510640, People's Republic of China |
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| Abstract: | A series of functional polyacetylenes (PAs) bearing diphenyl oxadiazole pendant groups ( P1 – P4 ) were prepared, and the resultant polymers are completely soluble in common organic solvents. Their structures and properties were characterized and evaluated by DSC, TGA, UV, PL, CV, and EL analyses. The results show that all the resulting polymers possesses low LUMO energy level and high thermal stability, and the resultant functional polyacetylenes without spacer group between the polyacetylene conjugated main chain and oxadiazole pendant groups ( P1 – P3 ) show lower LUMO energy level (～?3.87 eV) and higher thermal properties (Tg) than that ( P4 ) with a flexible spacer. The resultant polymer ( P2 ) was applied as an ETM in bilayer electroluminescent devices and effectively enhances external quantum efficiency and the brightness of device, and decreases turn‐on voltages of devices. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1406–1414, 2010 |
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| Keywords: | electron transport material light‐emitting diodes oxadiazole polyacetylene thermal properties |
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