PAPERS
Abstract: 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.
Key words: PTPD, doping, emission mechanism
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Received: 18 August 2015 Revised: 18 March 2008 Online: Published: 01 August 2008
| Citation: |
Nie Hai, Tang Xianzhong, Chen Zhu, Wu Lijuan. An Electroluminescence and Emission Mechanism for Small Molecular Doped Polymer Light-Emitting Diodes[J]. Journal of Semiconductors, 2008, 29(8): 1575-1580.
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Nie H, Tang X Z, Chen Z, Wu L J. An Electroluminescence and Emission Mechanism for Small Molecular Doped Polymer Light-Emitting Diodes[J]. J. Semicond., 2008, 29(8): 1575.
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