| Identification | Back Directory | [Name]
F8BT | [CAS]
210347-52-7 | [Synonyms]
F8BT
PFBT
PFO-BT
PFO-BT 15
F8BT, PFBT, PFO-BT
F8BT average Mn 17,000-23,000
Poly(9,9-dioctylfluorene-co-benzothiadiazole)
Benzothiadiazole-9,9-dioctylfluorene copolyMer
Poly(9,9'-dioctylfluorene-co-benzothiadiazole)
Poly(9,9-dioctylfluorene-alt-benzothiadiazole)
9,9-Dioctylfluorene-2,1,3-benzothiadiazole copolymer
Benzothiadiazole-9,9-dioctylfluorene alternating copolyMer
Poly(9,9-dioctylfluorenyl-2,7-diyl)-alt-(benzothiadiazol-4,7-diyl)
Poly[2,1,3-benzothiadiazole-4,7-diyl(9,9-dioctyl-9H-fluorene-2,7-diyl)]
Poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,7-diyl)]
Poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)]
Poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)] average Mn 10,000-20,000
Poly(9,9-dioctylfluorene-alt-benzothiadiazole)
Poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)]
Poly[2,1,3-benzothiadiazole-4,7-diyl(9,9-dioctyl-9H-fluorene-2,7-diyl)]
2,1,3-Benzothiadiazole-9,9-dioctylfluorene copolyMer | [Molecular Formula]
(C35H42N2S)n |
| Questions And Answer | Back Directory | [Classification]
Polyfluorenes, Benzothiodiazoles, Organic semiconducting materials, Semiconducting polymers, OLED green emitter materials, OLED materials, Organic Photovoltaic materials, Polymer solar cells, OFET materials.
| [Applications]
A widely used green emitting reference polymer for a variety of applications including as an emissive species in OLEDs, an approximately balanced p-type and n-type polymer for OFETs and light emitting transistors as well as being used a polymeric accepter for OPVs. The deep lying HOMO and LUMO levels (5.9 / 3.3 eV) make it air stable while the liquid-crystalline and beta phases make it widely used for basic research purposes.
Device structure
ITO/PEDOT:PSS/TFB/F8BT/F8imBT-Br*/Ca/Al [4]
Colour
Green 
Max. Current Efficiency
17.9 cd/A
Max. Power Efficiency
16.6 lm W−1
| [Usage Datasheet]
For a high efficiency green OLED we recommend blending F8 with F8BT with the below specifications. This ink can then be applied either in air or in a glovebox with little difference in performance provided exposure time and light levels are minimised.
At typical concentrations of 10 mg/ml 100 mg of F8 (PFO) will make around 200 devices on Ossila's standard ITO substrates (20 x 15 mm) assuming 50% solution usage (50% loss in filtering and preparation).
OLED reference device:
- F8 with F8BT
- Blend ratio of 19:1 (F8:F8BT) in Toluene
- Total concentration of 10 mg/ml
- 0.45 μm PTFE filter
- Spun at 2000 rpm (approx. 70 nm thickness)
Pipetting 20 μl of the above solutions onto a substrate spinning at 2000 rpm should provide a good even coverage with approximately 70 nm thickness. The substrate needs to be spun until dry, which is typically only a few seconds — 15 seconds should be ample to achieve this. Thermal annealing should be undertaken at 80°C for 10 minutes prior to cathode deposition
A basic but efficient OLED can be made using PEDOT:PSS as a hole transport layer and Calcium/Aluminium as the electron contact. When used with the Ossila ITO substrates and shadow masks this produces an easy to fabricate yet efficient >100 cd/m2) device.
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Sigma-Aldrich
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