People and recognition

Joining forces to study perovskite interfaces

AMOLF group leaders Professor Wiebke Albrecht and Professor Bruno Ehrler have received an NWO ENW-M2 grant for their joint research project, The Dynamic Atomic Interface between Halide Perovskites and Metals. The insights gained will pave the way for sustainable, high-performance solar energy and information technology. Wiebke and Bruno will each hire a PhD student for this project. The grant amounts to €800.000.

Halide perovskites are promising materials for solar cells, LEDs, and brain-inspired computers. Their performance is determined by the ‘living’ interfaces they form with metals, which can change under the influence of light and voltage.


Complementary expertise

The M2 grant provides funding for two PhD student projects that bring together complementary expertise. The Hybrid Nanosystems group, led by Wiebke, operates the light-coupled TEM, a microscope that can image materials atom by atom while shining light on them and applying a voltage. The PhD student in this group will use this microscope to study gold–perovskite nanostructures under illumination.

In the Hybrid Solar Cells group, led by Bruno, a second PhD student will build small device-like structures, including electronic components that can remember information by changing their electrical resistance. These are called memristors, a name combining the words ‘memory’ and ‘resistor’. Memristors are promising building blocks for brain-inspired computers because they can mimic certain properties of synapses, the connections between neurons.

Since the nanostructures studied in Wiebke’s group are the key to the function of the memristors, both groups combine their expertise to understand these dynamic materials.

Both observation and understanding

When asked about their complementary expertise, Wiebke says: “Using our unique microscope, I will make visible what otherwise stays hidden. Bruno will bring expertise in how these materials behave in real devices.”

The contacts between perovskites and metals are crucial for the performance of electronic devices. These are known to change during operation, but it is unclear where or how these changes begin. Together, Wiebke and Bruno will be able to follow the entire process: from moving atoms to working devices.


Illustration of the project The Dynamic Atomic Interface between Halide Perovskites and Metals. Researchers study the atomic motions at the interface between a metal and a perovskite semiconductor using light (green beam coming from the left) and the transmission electron microscope (tip descending from top to bottom). A voltage can be applied between the metal contacts (gold colored). AI-generated image.
The atomic motions at the interface between a metal and a perovskite semiconductor using light (green beam coming from the left) and the transmission electron microscope (tip descending from top to bottom). A voltage can be applied between the metal contacts (gold colored).

“Perovskites are almost alive: their atoms move as soon as you shine light on them or apply a voltage. With our microscope, we will watch this happen at the contact with a metal, atom by atom.”

Wiebke Albrecht

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