Master Thesis Project: Organic Electronics
Job offer from October 02, 2017
Memory is a prerequisite for many electronic devices. Organic non-volatile memory devices are promising candidates towards the development of a low-cost printable and flexible memory technology. Ferroelectric materials have emerged in microelectronics as attractive candidates for data storage applications. In particular, interest in organic ferroelectric materials is growing due to their low processing temperature that allows device fabrication on foils, enabling thereby flexible electronics.
The most commonly used organic ferroelectric materials are random copolymers of poly(vinylidenefluoride) (PVDF) with trifluoroethylene (P(VDF-TrFE)). Solution-processed organic ferroelectric transistors (FeFETs) based on P(VDF-TrFE) in combination with various semiconducting polymers have been demonstrated and the device physics is well understood.
However, large-scale integration of P(VDF-TrFE) in ferroelectric devices is hampered by the limited thermal stability of the remnant polarization due to its low Curie temperature and the relative large surface roughness of the ferroelectric films. A breakthrough would be the realization of FeFETs based on the commodity polymer PVDF.
FeFETs based on solution-processed PVDF have not been reported so far as PVDF films are normally extremely rough and not ferroelectric. Recently however we have shown that ferroelectric d-PVDF films can be made1. When processed at elevated temperature, PVDF turns into a smooth film, and becomes ferroelectric after applying a short electrical pulse.
In this project, we would like to investigate d-PVDF as the ferroelectric gate in organic field-effect transistors.
We are therefore looking for a highly motivated student with a background in physics, chemistry, polymer science, materials science or related fields, to carry out the following tasks:
- to fabricate the devices, and
- to perform electrical characterizations and evaluate different processing/device parameters.
Candidates should send their application electronically containing an application letter, CV, diploma/degree/mark sheet (official transcript), and reference letters to firstname.lastname@example.org. Applications will be considered until the position is filled.