| Original Articles |
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Energy and Charge Transfer from Guest to Host in Doped Organic
Electroluminescent Devices |
| LI Hong-Jian1;PENG Jing-Cui1;XU Xue-Mei1,2;QU Shu1;LUO Xiao-Hua1;ZHAO Chu-Jun1 |
| 1Department of Applied Physics, Hu’nan University, Changsha 410082
2College of Physics Science and Technology, Central South University, Changsha 410083 |
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| Cite this article: |
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LI Hong-Jian, PENG Jing-Cui, XU Xue-Mei et al 2002 Chin. Phys. Lett. 19 1356-1358 |
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Abstract The luminescence properties of doped organic electroluminescent devices are explained by means of a Hamiltonian model. The results show that there is a corresponding relation between the amount of the transferred charge and the change of the energy originated from charge transfer, and the relation can be influenced by dopant concentration. As the amount of the transferred charge increases, the total energy decreases and the luminescence intensity increases. Therefore, we deduce that the energy transfer from guest to host may be derived from the charge transfer. For a given organic electroluminescent device, the maximum value of the conductivities can be observed in a specific dopant concentration. The calculated results show that the greater the transferred charges, the higher the conductivities in doped organic electroluminescent devices. The results agree basically with experimental results.
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| Keywords:
78.60.Fi
34.70.+e
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Published: 01 September 2002
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