An Electroluminescence and Emission Mechanism for Small Molecular Doped Polymer Light-Emitting Diodes
有机小分子掺杂的聚合物发光二极管电致发光及其发射机制

Small-molecule doped polymer light-emitting diodes have been fabricated using a novel PTPD (poly-TPD) as the hole transport material and highly fluorescent Rubrene as the dopant.Electroluminescent characteristics of different doped concentrations are studied at different voltages.The results indicate doping can control luminescence color.EL spectra and PL spectra have been investigated in Rubrene doped PTPD devices.Experiments indicate the presence of energy transfer and charge transfer from PTPD to Rubrene for PL and the presence of energy transfer and carrier trapping from PTPD to Rubrene for EL.The EL emission mechanism for doped devices is carrier trapping and Forster energy transfer processes working together.