Royal Society of Chemistry praises HZB team’s paper on hybrid perovskite structures

T-x phase diagram has been created for MAPb(I,Br)<sub>3</sub> for the first time. It was revealed that the phase transition temperature of the iodine-rich mixed crystals drops as iodine content increases.

T-x phase diagram has been created for MAPb(I,Br)3 for the first time. It was revealed that the phase transition temperature of the iodine-rich mixed crystals drops as iodine content increases. © RSC Advances

For the 10th anniversary collection of its journal, the Royal Society of Chemistry (RSC) selected a paper published by a team from HZB. The paper from HZB is described as one of the most important contributions in the field of solar energy in recent years. The journal praised 23 selected papers that had been often cited or downloaded, and which offered a valuable advantage for further research. 

The HZB paper focuses on the systematic characterisation of hybrid perovskites containing mixed halides (MAPb(I,Br)3). The samples of the mixed crystals were produced in powder form using a solvent-based synthesis method. The research team from HZB’s Department Structure and Dynamics of Energy Materials (SE-ASD) showed that the crystal structure of the mixed crystal compounds is temperature dependent. As the materials go through different phase transitions, they form either a tetragonal or a cubic perovskite structure depending on the temperature and chemical composition. Now, a comprehensive T-x phase diagram has been created for this solid solution series for the first time. It was revealed that the phase transition temperature of the iodine-rich mixed crystals drops as iodine content increases, which stabilises the cubic perovskite structure at room temperature.

For their temperature-dependent in-situ experiments, HZB’s team used the DIFFRACTION end station of the BESSY II beamline KMC-2. They additionally determined the band gap energy and studied the optoelectronic properties of these perovskite compounds (among other things using photoluminescence spectroscopy).

The results led to a fundamental structural characterisation of these mixed halide perovskite compounds. Although the study was based on powder-form materials, the insights gained on the temperature-dependent behaviour of these hybrid halide perovskites can be now be applied to thin-film materials like those used to create absorbers for thin-film solar cells.     

The paper was authored by Frederike Lehmann as part of her doctoral thesis in the graduate school HyPerCell. Her thesis was supervised by Prof. Dr. Susan Schorr and Dr. Alexandra Franz from the HZB Department Structure and Dynamics of Energy Materials and by Prof. Dr. Andreas Taubert from Potsdam University. “The paper was an excellent team achievement, and we are delighted that the RSC chose to write about us,” says Susan Schorr.

Click here for the RSC Advances Anniversary Collection “Solar Energy

(sz)

  • Copy link

You might also be interested in

  • Vortragsreihe zu BIPV auf der Inolope Expo 2025
    Nachricht
    04.02.2025
    Vortragsreihe zu BIPV auf der Inolope Expo 2025
    Das Helmholtz-Zentrum Berlin und BAIP - Beratungsstelle für Bauwerkintegrierte Photovoltaik sind Partner der Inolope Expo 2025 – der Business-Plattform für innovative Gebäudehüllen.

    An unserem Stand 7.F02 laden wir zu Gesprächen  und Informationen zu BIPV ein. An zwei Tagen präsentieren wir praxisorientierte Vorträge zum Thema bauwerkintegrierte Photovoltaik und Insights zu unserem Real-labor Testinghalle. Hier erfahren Sie, wie Sie mit solarer Architektur auf innovative, ästhetische und nachhaltige Weise gestalten.

  • HZB Sets New World Record for CIGS Perovskite Tandem Solar Cells
    News
    04.02.2025
    HZB Sets New World Record for CIGS Perovskite Tandem Solar Cells
    Combining two semiconductor thin films into a tandem solar cell can achieve high efficiencies with a minimal environmental footprint. Teams from HZB and Humboldt University Berlin have now presented a CIGS-perovskite tandem cell that sets a new world record with an efficiency of 24.6%, certified by the independent Fraunhofer Institute for Solar Energy Systems.

  • HZB-magazine lichtblick - the new issue is out!
    News
    31.01.2025
    HZB-magazine lichtblick - the new issue is out!
    In the cover story we introduce Astrid Brandt. She is Head of User Coordination at Helmholtz-Zentrum Berlin. She and her team keep constant track of applications, measurement times and publications of the 1000 guest researchers who come to BESSY II each year.

    She has always been fascinated by science. But she has also never let go of her other passion, which is music.