Silicon Oxide OFET Substrates
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Silicon substrates designed for use in organic electronics labs as OFET substrates, as well as for a number of other applications including X-ray and elipsometry measurements. Sold on 200 mm wafer mounts and available pre-oxidised and pre-diced to our standardised substrate size of 15 mm x 20 mm, which fits in our substrate rack and makes batch cleaning and processing much faster and simpler.
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| Order code | Oxide (nm) | Dicing | Resistivity (ohm cm) | Usage |
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| S143 | None* | Undiced | 0.0005 to 0.001 | Ellipsometry and X-ray measurements |
| S144 | None* | Diced | 0.0005 to 0.001 | Ellipsometry and X-ray measurements |
| S141 | 100 nm | Diced | 1 to 30 | OFETs with lower threshold voltage (not suitable for use with gold) |
| S145 | 300 nm | Undiced | 0.0005 to 0.001 | OFETs with a robust electro-mechanical gate insulator (suitable for use with gold) |
| S146 | 300 nm | Diced | 0.0005 to 0.001 | OFETs with a robust electro-mechanical gate insulator (suitable for use with gold) |
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Wafer Specifications
| Wafer diameter: | 200 mmm (8") |
| Oxide thickness tolerance: | +/- 5% (both sides) |
| Wafer Type/Dopant: | P/Boron |
| Resistivity: | 0.0005 ~ 0.001 ohm.cm 1-30 ohm cm |
| Thickness: | 725 +/-25um |
| Growth: | CZ |
| Orientation: | <100> |
| Front surface: | Polished |
| Back surface: | Etched |
Dicing Specifications (S144 & S146)
| Substrate Size: | 20mm x 15mm |
| Substrates per wafer: | ~75 complete substrates (plus partial edge pieces) |
| Wafer Protection: | Thick photoresist (S144 and S146 only) |
Cleaning routine
As with all organic electronic devices, getting a clean substrate is essential for high performance. Our pre-diced substrates make batch cleaning easier by use of a substrate rack and wafers S144 and S146 have also been coated with a thick photoresist prior to dicing to ensure wafer cleanliness. These wafers can be cleaned with the following routine:
• 5 mins sonication in acetone
• 5 mins sonication in fresh acetone
• 5 mins sonication in IPA
• N2 blow dry
OLED/OPV components
PCDTBT, P3HT, PCBM and PEDOT:PSS.
OFET components
OLED/OPV overview
OFET overview
