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物理学报  2007 

Electroluminescence of polymer doped small-molecules light-emitting diodes and the effects of doping trap
聚合物掺杂有机小分子发光二极管的电致发光与杂质陷阱效应

Keywords: electroluminescence,doping,trapping effect
电致发光
,掺杂,陷阱效应

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Abstract:

Polymer doped small-molecule light-emitting diodes have been fabricated using a novel PTPD (poly-TPD) as the hole transport material and the highly fluorescent rubrene as the dopant. Electroluminescent characteristics are studied at different doped concentrations and different film thicknesses. The results indicate the presence of doping trap effect. It is assumed that the traps are limited at discrete levels. Based upon the double-carrier injection theory, an analytical model of J-V characteristics of doped device is deduced by solving the Poisson equation. Calculated data of this model are consistent with our experimental results.

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