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Polymer light emitting diode using PFT--poly(9,9'-n-dihexil-2,7-fluorenodiilvinylene-alt-2,5thiophene).
G Santos1, F J Fonseca, A M Andrade
1Laboratório de Microeletrônica, Departamento de Engenharia de Sistemas Eletrônicos, Escola Politécnica da Universidade de São Paulo, Av. Prof. Luciano Gualberto, trav 3, no 380, CEP 05508-900, São Paulo, SP Brasil.
Researchers synthesized a new electroluminescent polymer, poly(9,9'-n-dihexil-2,7-fluorenodiilvinylene-alt-2,5thiophene) (PFT), for polymer light-emitting devices (PLEDs). The PFT polymer demonstrated promising electroluminescence properties for organic electronics applications.
Area of Science:
- Organic Electronics
- Materials Science
- Polymer Chemistry
Background:
- Development of novel electroluminescent polymers is crucial for advancing Polymer Light Emitting Devices (PLEDs).
- Specific color tuning in PLEDs remains a key area of research in organic electronics.
Purpose of the Study:
- To synthesize a new electroluminescent polymer for PLED applications.
- To evaluate the polymer's performance as an emissive layer in a PLED device.
- To analyze the electroluminescence properties and carrier transport mechanisms.
Main Methods:
- Synthesis of poly(9,9'-n-dihexil-2,7-fluorenodiilvinylene-alt-2,5thiophene) (PFT) from fluorene.
- Fabrication of a three-layer PLED device using PFT as the emissive layer.
- Characterization of the PLED device's electroluminescence spectrum, brightness, and luminous efficiency.
Main Results:
- The synthesized polymer PFT exhibits absorption maxima around 480 nm and emission maxima around 560 nm.
- The PLED device with PFT as the emissive layer showed an electroluminescence spectrum peaked at 540 nm.
- At 12 Volt, the device achieved a brightness of approximately 10 cd/m² and a luminous efficiency of 0.01 lm/W.
Conclusions:
- The new fluorene-based polymer PFT is a viable candidate for emissive layers in PLEDs.
- The study provides insights into carrier transport and electroluminescence in the fabricated PLED device.
- Further research can focus on optimizing polymer structure and device architecture for improved performance.
