PhD position in In situ structural characterization of multilayer formation during large-scale processing of 3rd generation solar cells

DTU Energy
Monday 01 May 17

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The section for Imaging and Structural Analysis (ISA) in the Department of Energy Conversion and Storage at the Technical University of Denmark (DTU Energy) is seeking a candidate for a PhD position in In situ structural characterization of multilayer formation during large-scale processing of 3rd generation solar cells.

At DTU Energy, we have considerable experience with development of 3rd generation solar cells, specifically as regards scale-up to devices that may be manufactured at high speed in large volume.

To become truly competitive as an important part of the energy supply in the future society, relying entirely on sustainable energy, we must acquire a better understanding of the fundamental processes of charge generation and transport in 3rd generation solar cells.

At DTU Energy, we are leading experts in characterization of the crucial nanostructures governing solar cell performance, but in order to model and manage charge generation and transport in solar cells, we need to understand not only the static structures, but also the dynamic properties of the system. See also below for a further description of the department and the research section.

This is a fully funded position offered by DTU Energy with all employee benefits.

Responsibilities and tasks

  • At DTU Energy, we have developed a state-of-the-art in situ setup integrated with instrumentation for Grazing Incidence Small Angle X-ray Scattering (GISAXS). It is adapted for use at synchrotrons for fast structural characterization during roll-to-roll coating by both Small and Wide Angle X-ray Scattering (GISAXS/GIWAXS). In this project, the candidate will use this methodology to determine the process parameters for R2R coating of optimal layer structures as predicted by 3D nanostructural analysis and modelling. The use of in situ techniques should be developed to include new analytical techniques such as absorption spectroscopy and focus will also be on developing new methods for data analysis to maximise the structural information derived and to enable faster experiments with millisecond time resolution.
  • As the direct outcome of the project, we aim for
    • Determination of complete phase diagrams covering chemical and processing parameters that will allow us to pin-point the exact conditions required to achieve the appropriate phase assemblage and nano-structure, as predicted by 3D modelling. This will be used in the application to champion material systems
    • Determination of a complete ternary donor/acceptor/solvent phase-diagram for a polymer system
    • Determination of the binary solid/solvent nano-structure phase-diagram for a solution-coated kesterite solar cell
    • full in-line description of crystallinity and texture during coating, annealing and selenization of a kesterite solar cell
    • Extension of phase-diagram mapping to multicomponent systems, including structure-directing constituents and solvent additives
  • The project constitutes a central part of SEEWHI, a 5 year project, funded by the European Research Council and aimed at a breakthrough in high-efficiency, large scale 3rd generation solar cells.
Qualifications
Candidates should have a master's degree in Physics, Chemistry or a similar relevant degree with an academic level equivalent to the master's degree in engineering.

Approval and Enrolment
The scholarships for the PhD degree are subject to academic approval, and the candidates will be enrolled in one of the general degree programmes of DTU. For information about the general requirements for enrolment and the general planning of the scholarship studies, please see the DTU PhD Guide.

Assessment
  • The assessment of the applicants will be made by Professor Jens Wenzel Andreasen and Head of Section Luise Theil Kuhn
  • The candidate should have a background in experimental physics, preferably with some experience in experimental X-ray physics.
  • We welcome experience and qualifications in X-ray methods, specifically small angle scattering and diffraction.
We offer
We offer an interesting and challenging job in an international environment focusing on education, research, public-sector consultancy and innovation, which contribute to enhancing the economy and improving social welfare. We strive for academic excellence, collegial respect and freedom tempered by responsibility. The Technical University of Denmark (DTU) is a leading technical university in northern Europe and benchmarks with the best universities in the world.

Salary and appointment terms
The salary and appointment terms are consistent with the current rules for PhD degree students. The period of employment is 3 years.

We are currently present on both Risø Campus, close to the town of Roskilde, and Lyngby Campus, north of Copenhagen. In 2019, the entire department will be moving into new facilities at Lyngby Campus.

Workplace
The main workplace will be at DTU Energy, Risø Campus, Denmark.

Further information
Further information may be obtained from Professor, Jens Wenzel Andreasen, tel.: +45 21 32 63 01, jewa@dtu.dk.
Additional information about the department can be found on www.energy.dtu.dk.

Please do not send applications to this e-mail address, instead apply online as described below.

Application
Please submit your online application no later than 1 June 2017.

Applications must be submitted as one pdf file containing all materials to be given consideration. To apply, please open the link "Apply online," fill in the online application form, and attach all your materials in English in one pdf file. The file must include:
  • A letter motivating the application (cover letter)
  • Curriculum vitae
  • Grade transcripts and BSc/MSc diploma (an official translation into English)
  • Excel sheet with translation of grades to the Danish grading system (see guidelines and excel spreadsheet here)

Candidates may apply prior to obtaining their master's degree, but cannot begin before having received it.

All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply.

The Department of Energy Conversion and Storage is focused on education, research, and development within functional materials and their application in sustainable energy technologies. The Department, which has more than 200 employees, was founded in 2012.
The section for Imaging and Structural Analysis is leading the department’s research in imaging and scattering experiments with X-rays , neutrons and electrons with focus on in situ and in operando applications.

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 5,800 advance science and technology to create innovative solutions that meet the demands of society; and our 10,600 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government, and public agencies.