Pure red emission hybrid light-emitting devices based on the blend of CdSe/ZnS quantum dots and an n-type polymer |
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| Authors: | Gang Cheng Dehua HuPing Chen Yu DuanYi Zhao Yuguang Ma Shiyong Liu |
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| Affiliation: | a State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, Chinab State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China |
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| Abstract: | We report on hybrid light-emitting devices (HLEDs) based on CdSe/ZnS quantum dots in polymer matrices. Color purity of the HLED with a mixed matrix consisting of polyvinylcarbazole (PVK) and 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) improves with the increasing concentration of PBD. We attribute this improvement to the increased electron mobility of the matrix. By using an n-type cyano-containing polymer derived from 6-(3,6-dibromo-9H-carbazol-9-yl)hexanenitrile and tetraphenylsilane to replace PVK:PBD as the matrix, further pure red emission with Commission Internationale De L'Eclairage coordinates of (0.67, 0.33) and maximum external quantum efficiency of 2.51% has been achieved. |
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| Keywords: | Quantum dots Polymer Light-emitting devices |
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