02/06/2020

PhD student – scholarship holder.Spectroscopic studies of ZnMgO/Zn(Cd)O:Eu/ZnMgO quantum structures for maximum emission efficiency of Eu near 620 nm

Dieses Jobangebot ist nicht mehr aktuell


  • ORGANISATION/EINRICHTUNG
    Institute of Physics, Polish Academy of Sciences, Warsaw
  • FORSCHUNGSBEREICH
    PhysicsSolid state physics
  • KARRIERESTUFE
    First Stage Researcher (R1)
  • BEWERBUNGSFRIST
    07/06/2020 16:00 - Europe/Brussels
  • STANDORT
    Poland › 02-668 Warsaw
  • KONTAKTTYP
    Temporary
  • JOB STATUS
    Full-time
  • STUNDEN PRO WOCHE
    40
  • ANGEBOT BEGINN
    01/10/2020
  • REFERENCE NUMBER
    Job ID: #JOB 18/2020

The PhD student will join the Group of Electron Microscopy and Electron Spectroscopy under the supervision of prof. Adrian Kozanecki and dr hab. Ewa Przeździecka. The student will work on the NCN funded project “Pathway to high-efficiency red emission in Eu-doped ZnO-based light sources”. The aim of the PhD project is in general study of optical properties of ZnO-based quantum structures doped with Eu ions and explanation of excitation and de-excitation mechanisms of red emission of Eu3+ ions at ~620 nm. This includes: studies of ZnO:Eu quantum wells to examine the influence of quantum confinement on the photoluminescence (PL) efficiency. In this part of the project two types of structures will be tested: c-oriented polar and m- or a- oriented nonpolar structures. The main idea of using non-polar substrates is to get rid of the polarization fields in hexagonal wurtzite structure and their negative influence on recombination processes in ZnO-based quantum wells and superlattices. Growth of nonpolar multilayer structures seems to be favourable for the emission efficiency, when dopants are located in optically active regions such as quantum wells. This is a very important issue for the final outcome of the project. It is necessary to check experimentally how spatial separations of charge carriers may influence the PL efficiency of Eu3+. It will contribute to explanation of mechanisms of excitation and this is another aim of this project. Manipulation with the barrier heights should allow to find the optimum compositions for the maximum emission of Eu. It is also expected that the project will answer the question about the role of Eu2+ charge state in excitation of the red emission of Eu3+ ions.

Selection process

Application deadline: 7.6.2020 Later applications will not be considered.

Required materials:

• Scientific CV

• Cover letter

• Scan of MsC diploma or equivalent (or an explanation of when one is expected)

• Academic record (for finalized semesters)

• Recommended: A recommendation letter by an academic, or their contact email.

 

All materials should be submitted in electronic form by application to the PhD school http://warsaw4phd.eu, choosing the project: " Pathway to high-efficiency red emission in Eu-doped ZnO-based light sources ". (The application system will be active from 25 May 2020 to 7 June 2020).

Additional comments

Main research field: Physics

Sub Research Field: solid state physics, or materials sciences, or chemistry

Career Stage: Early stage researcher or 0-4 yrs (Post-graduate)

Research Profile (details): First Stage Researcher (R1)

Type of Contract: Fixed term (32 months)

Status: Full-time

Salary: stipend 4000 PLN per month (grant funding, before obligatory employer and employee social security contributions).

Contact

More information can be obtained from Adrian Kozanecki (e-mail: kozana@ifpan.edu.pl)

Please do not hesitate to contact him.

Web site for additional job details

Anforderungen für das Jobangebot

  • ERFORDERLICHES BILDUNGSNIVEAU
    Physics: Master Degree or equivalent
  • ERFORDERLICHE SPRACHEN
    ENGLISH: Good

Besondere Anforderungen

Requirements:

- MSc degree in solid state physics (preffered), or in material sciences, or in chemistry, but with some interests to solid state physics;

- basic knowledge of the methods of optical spectroscopy,

- knowledge of written and spoken English;

- some knowledge of principles (and practise) of MBE technology is welcome.

To be employed, the candidate must be accepted into the PhD school in which the Institute of Physics participates. Applications for the position are through recruitment to the School, online at http://warsaw4phd.eu .

Arbeitsort
1 position(s) available at
Institute of Physics, Polish Academy of Sciences, Warsaw
Poland
02-668 Warsaw
al. Lotników 32/46

EURAXESS Angebots-ID: 528469

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