I have tried till currents of 30A with voltage of 0.678V. But no evaporation was observed. At about 50A (and 0.828V) all the rubrene suddenly evaporated. Informarion about an estimate of the applied current or voltage would be useful.
Rubrene has a melting point around 330-335 degrees C.
Literature information recommends Rubrene vacuum deposition with a fixed source temperature of 300 ° : http://www.sciencedirect.com/science/article/pii/S0022024816000166
You have to set current and voltage to reach such temperature.
Instead of considering the voltage and current, better you should take the temperature of the source in account. In general, with each applied current and voltage value, you should wait until the source temperature reaches to its steady state temperature. In this way you slightly increase the temperature towards the melting point so that the fluctuation in the temperature near to melting point will not go too high and you can find the slow deposition of you rubrene. To my knowledge you should consider the deposition from sublimation point of view rather directly heating them above the required temperature.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Condensed Matter Physics
- Solid State Physics