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Solarzelle © UHH/Klinke

Hamburg research team optimises nanocrystals for solar cells

To convert light into electricity and to generate high-performance solar energy, researchers have been seeking new material for solar cells. Hamburg scientists found a promising solution

A research group headed by Dr. Christian Klinke has now successfully used lead sulfide to create two-dimensional nanocrystals of variable density and demonstrated their suitability for use in solar cells. These findings have been published in the journal “Nanoscale”.

Promising Results With Lead Sulphide

Lead sulphide is a semiconductor able convert light into electricity. Led by Dr. Christian Klinke, a group of scientists from the University of Hamburg now managed to produce two-dimensional lead sulfide nano-crystals with variable thickness. The structures produced are only a few square micrometers large with a height of two to 20 nanometers. Due to the low height of the structures, quantum effects occur that influence the optical and electrical properties of the structures. This allows the characteristics specifically adapted to the targeted applications. In the study, it is shown that there is an optimal layer thickness that guarantees maximum efficiency.

Key Technology Of The 21st Century

Nanotechnology is a key technology of the 21st century. Materials with dimensions of a few nanometers (one millionth of a millimeter) have special optical, magnetic, electrical and photoelectric properties. The results can be used in efficient light-emitting diodes, solar cells, new sensors, photodetectors and flexible transistors, but also in biological and medical applications.

Well Suited For Transistors And Solar Cells

“We were able to show that the materials are very well suited for use as transistors and solar cells, with the properties of the components depending heavily on the thickness of the nanocrystals”, said Dr. Christian latch. These new findings, which are described in detail by others in the scientific journal “Nanoscale”, make a significant contribution to the understanding of the opto-electronic properties of tailored nanostructures. They serve as a foundation for further research into useful two-dimensional systems and their application.

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