• Welcome to just.science

    The official researcher's website of Justus Just

  • Welcome to just.science

    The official researcher's website of Justus Just

My Research

My research focusses on the development and application of multimodal in-situ synchrotron based investigations for energy materials. I am combining X-ray absorption spectroscopy, X-ray diffraction and (X-ray) optical spectroscopy to access dynamic processes in-operando and in real-time, e.g. perovskite solar cell materials during synthesis, nano crystals during growth, catalysts in action or battery electrodes during rapid cycling.

Keywords

in-situ X-ray Absorption Spectroscopy

in-situ Multimodal X-ray Analysis (XAS, XRD, XEOL)

• Energy Materials (Photovoltaics, Batteries, Catalysis)

• Semiconductors

Recent Updates

New Paper: in-situ Nucleation and Growth of Colloidal Quaternary Nanocrystals by Multimodal X-ray Analysis: Quick-EXFAS / XANES / SAXS

In collaboration with the University of Limerick, Ireland and the Helmholtz-Zentrum Berlin, Germany, we recently published a study in ACS…

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New Paper: in-situ Nucleation and Growth of Colloidal Quaternary Nanocrystals by Multimodal X-ray Analysis: Quick-EXFAS / XANES / SAXS
First fully automated coating with newly developed in-situ slot-die coater

First fully automated coating with newly developed in-situ slot-die coater

We were able to perform our first test coatings with our recently developed slot-die coationg system. The system is now…

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Hello World!

Welcome to the new website of Justus Just. Here you will find information about my research and work at MAX…

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Hello World!

About me

Contact Information

Dr. Justus Just

Balder Beamline

I am working as a scientist at MAX IV Laboratory, Lund University. Together with my collegues I am managing the Balder beamline, which is dedicated to X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) in the medium and hard X-ray energy range, 2.4-40 keV. The high brilliance from the 3 GeV 4th generation storage ring in combination with the beamline design allows for real-time in-situ XAS measurements down to sub-second time resolution.

My particular interests are :

  • time-resolved real-time in-situ X-ray absorption spectroscopy (XAS)

  • XAS- based multimodal experiments with simultanous measurements of: X-ray diffraction (XRD) or X-ray excited optical luminescence (XEOL)

read more about the Balder beamline

Projects

With in-FORM we develop a synchrotron based in-situ material research platform to gain insight into the formation of functional materials during deposition. This platform consists of a slot-die coating and annealing system with atmosphere control and a suitably small foot-print as well as flexibility for integration into the Balder beamline at MAX IV.

Source: Swedish Foundation for Strategic Research (SSF-Works)

Period: 2019-2023

Total budget: 7.7 MSEK

XRD@Balder: Synchronously combined in-situ X-ray diffraction and X-ray absorption spectroscopy for new catalytic materials

The collaborative project between Balder and Chalmers University, Göteborg, is aiming to develop and implement (in-situ) X-ray diffraction capabilities simultaneously with X-ray spectroscopy in one experimental setup with sub-second time resolution. This project is framed in the exploration of new catalytic materials, their molecular function and ways to use them for environmental protection and chemical production without putting planetary boundaries for sustainability at risk.

Source: Chalmers University

Period: 2020-2023

Total budget: 5.5 MSEK

Key Publications

Insights into Nucleation and Growth of Colloidal Quaternary Nanocrystals by Multimodal X-ray Analysis

J. Just, C. Coughlan, S. Singh, H. Ren, O. Müller, P. Becker, T. Unold, and K. M. Ryan

Optical in situ monitoring during the synthesis of halide perovskite solar cells reveals formation kinetics and evolution of optoelectronic properties

K. Suchan, J. Just, P. Becker, E. L. Unger and T. Unold

Depth distribution of secondary phases in kesterite Cu2ZnSnS4 by angle-resolved X-ray absorption spectroscopy

J. Just, D. Lützenkirchen-Hecht, O. Müller, R. Frahm, and T. Unold

Real-time observation of Cu2ZnSn(S,Se)4 solar cell absorber layer formation from nanoparticle precursors

R. Mainz, B. C. Walker, S. S. Schmidt, O. Zander, A. Weber, H. Rodriguez-Alvarez, J. Just, M. Klaus, R. Agrawal and T. Unold

Quick-EXAFS Setup at the SuperXAS Beamline for in Situ X-Ray Absorption Spectroscopy with 10 ms Time Resolution

O. Müller, M. Nachtegaal, J. Just, D. Lützenkirchen-Hecht and R. Frahm

20.8% Slot‐Die Coated MAPbI3 Perovskite Solar Cells by Optimal DMSO‐Content and Age of 2‐ME Based Precursor Inks

J. Li, J. Dagar, O. Shargaieva, M. A. Flatken, H. Köbler, M. Fenske, C. Schultz, B. Stegemann, J. Just, D. M. Többens, A. Abate, R. Munir and E. Unger