New article on band bending engineering
Our article Band Bending Engineering at Organic/Inorganic Interfaces Using Organic Self-Assembled Monolayers just appeared in Advanced Electronic Materials (). It will be part of a special issue feature Aalto's new Materials Platform.
Adsorbing strong electron donors or acceptors on semiconducting surfaces induces band bending, whose extent and magnitude are strongly dependent on the doping concentration of the semiconductor. This study applies hybrid density-functional theory calculations together with the recently developed charge reservoir electrostatic sheet technique to account for charge transfer from the bulk of the semiconductor to the interface. This study further investigates the impact of surface-functionalization with specifically tailored self-assembled monolayers (SAMs). For the example of three chemically-similar SAMs, that all bond to the ZnO surface via pyridine docking groups, it is shown that the SAMs introduce shallow or deep donor levels that pin the band bending at the position of the SAM’s highest occupied molecular orbital. In this way, the magnitude of the induced band bending can be controlled by the type of SAM, to a point where the doping-concentration dependence is completely eliminated.
Read more news
Research Council of Finland establishes a Center of Excellence in Quantum Materials
The Centre, called QMAT, creates new materials to power the quantum technology of coming decades.
Major funding powers development of next-generation machine technology aimed at productivity leap in export sectors
The BEST research project is developing new types of sealing, bearing, and damping technology.
The TAIMI project builds an equal working life – a six-year consortium project seeks solutions to recruitment and skill challenges
Artificial intelligence (AI) is changing skill requirements, the population is aging, and the labor shortage is deepening. Meanwhile, the potential of international experts often remains unused in Finland. These challenges in working life are addressed by the six-year TAIMI project funded by the Strategic Research Council, and implemented by a broad consortium.