n-Type BBL:PEI ink

Description

• Application: Our n-type BBL:PEI ink is an butanol-based, eco-friendly and halogen-free precursor for high electron conductive and thermally stable (24 hours at 200 °C or 1 hour at 350 °C in N2) thin films. This product has a fixed solid content of 0.2 wt%. This ratio between BBL:PEI (50 % PEI content) results in the highest conductivity. It enables conductivity of up to 8 S/cm and Seebeck coefficient of at least -60 µV/K. Resistant to prolonged air exposure. It is compatible with large scale deposition methods, such as spray-coating and inkjet. The BBL:PEI ink can be further diluted for casting thin films in various thickness[1]. BBL:PEI thin films were fabricated by spray-casting in air, followed by annealing at 140 °C for 2 h inside a nitrogen-filled glovebox or under vacuum to produce conducting films. The BBL:PEI ink, when processed, forms a high electron conducting n-type film that can be implemented as conducting layer in solar cells, thermoelectric generators, light-emitting diodes, or logic applications:OPV – Charge extracting layer in Organic Solar CellsSuperCapacitors – Negatrode in Organic SupercapacitorsOECT – Active material in Organic Electrochemical TransistorsOLED – Charge injecting layer in Organic Light Emitting Diodes
• Preparation Note: Always store the ink in dark and at ambient temperature. Shake the bottle vigorously to ensure an optimal dispersion of the ink prior to processing (by using ultrasonic bath for instance; 100 to 300 W for 30 min).The ink is primarily designed to be spray-casted, with an air-gun or similar spraying methods. The films are stable in air up to 2 days before its thermal activation. Always proceed with the thermal activation of ink under inert environments (vacuum, N2, Ar, etc.) or if properly encapsulated with an air-stable compound.Thermally activated films of our ink films are not affected by chloroform, chlorobenzene, 1,8-diiodooctane, dimethylformamide and dimethyl sulfoxide.