PostDoc position in Project: Soft perovskites - new paradigm of semiconductors engineering

Job description:

The person selected in this competition will participate in research and development tasks carried out in the project entitled "Soft perovskites - new paradigm of semiconductors engineering", (National Science Center Maestro 12 program) led by Prof. Paulina Płochocka.

2D perovskites are soft, ionic, crystals with layered structure often regarded as natural quantum wells. A unique feature of 2D perovskites is that their optoelectronic properties can be tuned by different chemical substitution not only easily, but over a much more extensive range in comparison to 3D perovskites or classic semiconductors. A deterministic understanding of the mutual relations between the different tuning parameters is crucial for the optimization of potential applications. Another unique feature of 2D perovskites, which distinguish them from almost all semiconductors with good optoelectronic properties, is the softness of the crystal lattice, which allows to tune the lattice parameters over a much broader range with respect to epitaxial semiconductors. Therefore, 2D perovskites can push strain engineering to a level unattainable in epitaxial semiconductors, providing simple and effective control over the bandgap, carrier effective mass, electron-phonon coupling and other opto-electronic properties. In this project we make a general hypothesis that the vast majority of the opto-electronic properties of 2D perovskites are actually determined by a single parameter, namely the octahedral distortion. We expect that the structural parameters of 2D perovskites are directly correlated not only with the bandgap, but are also directly responsible for important parameters such as the carrier effective mass and the electron-phonon coupling. The octahedral distortion can be imposed inherently, by the organic spacers or externally using pressure or strain. Gaining an understanding of the complex mutual relation between octahedral distortion and optoelectronic properties will initiate a new direction in tuning the optoelectronic properties of the 2D perovskites to create semiconductors with strictly desired properties.

Tasks:

Selected candidate will be responsible for:

We offer:

The selected Candidate will be employed full-time under a contract of employment at the Wrocław University of Science and Technology for a period of 12 months – with 120 000PLN with the option for prolongation up to 36 months, provided in the project budget, for the salary (this is the amount " gross-gross ", including non-wage labor costs).