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The liquid solution of perovskite precursor, solvent, and additive flows from a slit-shaped nozzle onto the glass substrate being conveyed below.
SCIENCE HIGHLIGHT
The perfect recipe for efficient perovskite solar cells hey have improved a process for vertically depositing a solution made from an inexpensive perovskite solute onto a moving substrate below.
The illustration visualizes the composition of the tandem solar cell.
SCIENCE HIGHLIGHT
Perovskite/silicon tandem solar cells on the threshold of 30% efficiency The tandem cell provided stable performance for 300 hours – even without encapsulation. To accomplish this, the group headed by Prof. Steve Albrecht investigated physical processes at the interfaces to improve the transport of the charge carriers.
Schematic illustration: the solvants (ink) are used to produce a thin film of polycrystalline perovskite.
SCIENCE HIGHLIGHT
Perovskite Solar Cells: paving the way for rational ink design for... For the production of perovskite thin-films for large photovoltaic modules often inks are used which contain a mixture of solvents. An HZB team at BESSY II has now analysed how the crystallisation processes within such mixtures.
Nine samples with mixtures from CsPbBr2I (ink 1, left) to pure CsPbI3 (ink 2 right).
SCIENCE HIGHLIGHT
Solar cells: Mapping the landscape of Caesium based inorganic halide perovskites The study provides a quick and easy method to assess new compositions of perovskite materials in order to identify candidates for applications in thin film solar cells and optoelectronic devices.
Image of a silicon perovskite tandem solar cell
SCIENCE HIGHLIGHT
Silicon-perovskite tandem solar cells: New facilities pave the way for... Two new and innovative production lines for silicon perovskite tandem solar cells
Periodic metasurfaces (grey) can enhance photon upconversion of nanoparticles (yellow) by more than three orders of magnitude.
SCIENCE HIGHLIGHT
Upconversion of photons at low light intensities – the key to new applications... Through upconversion the usable range of the light spectrum can be significantly expanded and is the key for future applications in photovoltaics or for the detection of biological substances.
The LumY Pro is an easy-to-use, non-invasive and versatile system with unparalleled compactness to swiftly quantify absolute electro- and photoluminescence photon fluxes of thin film absorbers, layer stacks or complete devices under various operating conditions.
NEWS
Optimize opto-electronic devices with new compact measuring system In order to develop efficient opto-electronic devices such as solar cells or LEDs, it is crucial to improve the quality of the semiconductors. To achieve this, it is necessary to determine the luminescence yield of the semiconductor material. For this ...
Graphic representation of the printing process for the perovskite LED.
SCIENCE HIGHLIGHT
Printed perovskite LEDs – an innovative technique towards a new standard... LEDs from the inkjet printer - For the first time, it has been possible to produce light emitting diodes from hybrid perovskite semiconductor material using inkjet printing.
The illustration shows the changes in the structure of FASnI3:PEACl films during treatment at different temperatures.
SCIENCE HIGHLIGHT
On the road to non-toxic and stable perovskite solar cells To replace lead by less toxic elements is not easy since lead-free perovskites show lower stability and poor efficiencies. Now, an international collaboration has engineered a new hybrid perovskite material with promising efficiency and stability.
At the Helmholtz Innovation Lab HySPRINT, Steve Albrecht finds the appropriate techniques to produce the world's most efficient perovskite solar cells.
PORTRAIT
Portrait: The athlete in the lab coat Steve Albrecht is researching on perovskite solar cells and holds several efficiency world records with his team. Back in his schooldays, he was going to become either a competitive gymnast or a scientist. And he chose science.
The CIGS-Pero tandem cell was realised in a typical lab size of 1 square centimeter.
SCIENCE HIGHLIGHT
Tandem solar cell world record: New branch in the NREL chart The world-record cell combines the semiconductors perovskite and CIGS to a monolithic "two-terminal" tandem cell. It achieves a certified efficiency of 24,16 percent.
NEWS
Doctoral student receives Erhard Höpfner Thesis Award On 11 February 2020, Max Grischek received the Erhard Höpfner Thesis Prize, worth 2000 euros, which is awarded by a jury of the Berlin Scientific Society for outstanding master theses.
SCIENCE HIGHLIGHT
Perovskite solar cells: International consensus on ageing measurement protocols Experts from 51 research institutions have now agreed on the procedures for measuring the stability of perovskite solar cells and assessing their quality. The consensus statement is considered a milestone.
The tandem solar cell was realized on a typical laboratory scale of one square centimeter. However, scaling up is possible.
SCIENCE HIGHLIGHT
World Record: Efficiency of perovskite silicon tandem solar cell jumps to 29.15... In the race for ever higher efficiency levels, an HZB development team is once again ahead. The scientists have developed a tandem solar cell made of perovskite and silicon, which converts 29.15 per cent of the incident light into electrical energy.
The award ceremony in the dinosaur hall of the Natural History Museum in Berlin: Governing Mayor Michael Müller, Steve Albrecht and laudator Jürgen Mlynek.
NEWS
Berlin Science Award: Young Talent Award for Steve Albrecht The Governing Mayor of Berlin did award Prof. Dr. Steve Albrecht this year with the "Nachwuchspreis" (Young Talent Award) of the Berliner Wissenschaftspreis for his research on novel tandem solar cells.
NEWS
HZB awards prize for technology transfer project On 15 November, the best innovation project from the HZB will be awarded the Technology Transfer Prize 2019. The award ceremony is open to the public and will take place at 2 p.m. in the BESSY II auditorium in Berlin-Adlershof.
Marko Jošt was a PhD student in the HySPRINT-Lab in Steve Albrecht's group. Now he will continue his research on tandem solar cells at the university of Lubljana.
NEWS
Helmholtz Association promotes HZB cooperation with Slovenia on perovskite... The topics of the cooperation are tandem solar cells made of perovskite and silicon and, in particular, their precise characterisation.
The Pero-CIGS tandem cell achieves a record efficiency of 23.26 percent.
SCIENCE HIGHLIGHT
World record for tandem perovskite-CIGS solar cell A team headed by Prof. Steve Albrecht from the HZB will present a new world-record tandem solar at EU PVSEC in Marseille, France on September 11, 2019.
Prof. Dr. Christiane Becker in the clean room at HZB campus side Berlin-Adlershof.
PORTRAIT
FOCUS TOPIC: Catching more light in solar cells Christiane Becker uses microscopic structures to increase the amount of light captured in solar cells and is currently scaling up the technology for industrial application.
The Physical Society of Berlin is awarding the Karl-scheel-Prize to Steve Albrecht.
NEWS
Steve Albrecht wins the 2019 Karl Scheel Prize This year's Karl Scheel Prize from the Physikalische Gesellschaft zu Berlin honours Steve Albrecht of the Helmholtz-Zentrum Berlin für Materialien und Energie for his work in the field of highly efficient tandem solar cell absorbers made of metal-halide ...
1st place: "The interior of an electron beam evaporator in operation"
NEWS
1st place for "Glowing Silicon Lake" at the HZB photo competition for the Long... More than 200 people have chosen their favourite pictures in the photo competition "Moments at the HZB" during the Long Night of Science. The winners have now been chosen, but the decision was extremely close.
HZB-Teams are exploring and developing new technologies for perovskite based solar cells in the innovation lab HySPRINT.
NEWS
LAUNCH OF EPKI: European Perovskite Initiative for the development of... With the HySPRINT project and the recruitment of highly talented young scientists, Helmholtz-Zentrum Berlin has built up a considerable research capacity in the field of perovskite materials in recent years and is participating in the European Perovskite ...