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Effect of Electrical Field on Colloidal CdSe/ZnS Quantum Dots |
| WANG Zhi-Bing1, ZHANG Jia-Yu1, CUI Yi-Ping1, YE Yong-Hong2 |
| 1Advanced Photonics Center, Southeast University, Nanjing 2100962Department of Physics, Nanjing Normal University, Nanjing 210097 |
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| Cite this article: |
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WANG Zhi-Bing, ZHANG Jia-Yu, CUI Yi-Ping et al 2008 Chin. Phys. Lett. 25 4435-4438 |
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Abstract We fabricate the hybrid films of colloidal CdSe/ZnS quantum dots (QDs) and poly(9-vinylcarbazole) (PVK) sandwiched between two electrodes. The voltage and temperature dependences of the electroluminescence (EL) are measured. The quantum-confined Stark effect of colloidal QDs is clearly observed. To explore the mechanism in the QD EL, hybrid films are fabricated with different concentrations of colloidal QDs. Electrons and holes are proposed to be separately transported in QDs and PVK, respectively.
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| Keywords:
78.67.Hc
73.21.La
73.43.-f
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Received: 12 September 2008
Published: 27 November 2008
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