研究目的
To improve the charge transport performance in conjugated polymer thin films by using semiconducting single-walled carbon nanotubes (s-SWNTs) as efficient charge-transporting jointing channels between polymer chains.
研究成果
Incorporating a small amount of s-SWNTs into conjugated polymer films significantly improves charge transport performance by forming efficient charge-transporting channels. This approach enhances both hole and electron mobility, demonstrating good device uniformity and potential for large-area, low-cost polymeric electronic devices.
研究不足
The preparation of large-area high-quality oriented polymer films and single crystals remains challenging. The method requires optimization of s-SWNT concentration and ultrasonication process to avoid isolation of materials. Device performance may vary due to discrete mobility values in blended films.
1:Experimental Design and Method Selection:
The study aims to enhance interchain charge transport in conjugated polymers by incorporating s-SWNTs. Ultrasonication is used to ensure tight contact between polymer chains and s-SWNTs through π-π stacking.
2:Sample Selection and Data Sources:
PDPP-TT polymer and s-SWNTs are used. s-SWNTs are purified using poly [9-(1-octylonoyl)-9H-carbazole-2,7-diyl] (PCz) and ultracentrifugation.
3:List of Experimental Equipment and Materials:
PET substrates, gold electrodes, PMMA dielectric, aluminium gate electrodes, PDPP-TT, s-SWNTs, solvents like 1,2-dichlorobenzene and toluene. Equipment includes spin coater, thermal evaporator, AFM (Bruker Dimension Icon), Raman spectrometer (Horiba LabRAM HR800), UV-vis-NIR spectrophotometer (Shimadzu UV3600 Plus), and electrical measurement system (Keithley MM6200-4200/SCS).
4:Experimental Procedures and Operational Workflow:
Substrates are cleaned and electrodes deposited. Active layers are spin-coated, followed by dielectric and gate electrode deposition. Mixing involves ultrasonication to combine PDPP-TT and s-SWNTs, with ultracentrifugation for purification. Electrical properties are measured in ambient conditions.
5:Data Analysis Methods:
Charge carrier mobility is calculated using the saturation region equation from transfer characteristic curves. Statistical analysis is performed on multiple devices.
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