Physics Engineering Turkish researchers will bring QLED displays to high image quality with nanocrystals


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Turkish researchers will bring high image quality to digital displays with "nanocrystals"

METU scientists are producing "inorganic nanocrystal"-based materials for the development of new generation digital display technologies with rich color and image quality.

When the scientific study supported by the program provided by the Council of Higher Education (YÖK) to research universities is completed, high quality screens that can be printed even from a simple printer will be produced at low costs.

The new generation material called "inorganic nanocrystals" used in the technology in question is aimed to be widely used in many areas, from more efficient use of solar energy to sensitive surgeries.

METU Metallurgical and Materials Engineering Department Assistant Professor Yusuf Keleştemur, Prof. from the same department. Dr. He told the AA correspondent about their project titled "Development of colloidal semiconductor nanocrystal-based light-emitting diodes using solution-based methods using completely inorganic materials", which they developed together with Hüsnü Emrah Ünalan.

Stating that resources are allocated to scientific projects with YÖK's Research Universities Support Program (ADEP), Keleştemur stated that their projects are entitled to be supported within the scope of this program.

Explaining that light-emitting diode (LED) technologies, which offer energy-saving solutions, enable revolutionary developments in displays, Keleştemur stated that in addition to energy efficiency, rich color quality, high brightness values and low costs are targeted in the technologies to be used in new generation displays.


Stating that digital display technologies are constantly developing in order to provide the color tones and brightness of nature in mobile phones, computers and televisions, Keleştemur explained that the process that started with LCD technologies continues with Organic Light Emitting Diodes (OLED) displays.

Keleştemur stated that they developed three different innovative materials for new generation display technologies in the projects they carried out at METU, and gave the following information:

"By combining these materials in the same device structure, we aim to develop transparent LEDs with rich color quality and high brightness using completely solution-based methods. In nanocrystal-based light-emitting diodes (QLED), quantum dots are used as the active radiant material and metal oxide inorganic nanoparticles are used as the charge-carrying layer." "And we will use silver nanowires, which have high conductivity and flexibility, as the upper electrode. Thus, we aim to develop completely transparent and high-quality screens together with entrepreneurs with local and national resources."

"New generation screens that bend and fold"

Yusuf Keleştemur stated that they benefit from the much sharper radiation and high stability of inorganic nanocrystals.

On the question of what the new generation screens will be like when the project is completed, Keleştemur said:

"With these materials, we will be able to achieve high-quality colors on screens, similar to those in nature. Inorganic nanocrystal screens will be economical and high-resolution enough to be printed even from a printer. In other words, these screens can be printed on flexible plastic surfaces, bent and folded. If desired, transparent screens can also be obtained by printing on glass surfaces. "Regular OLED screens are costly to produce, but when we do this with a printer, the costs will drop significantly."


It can also be used for efficient solar energy production

Keleştemur stated that the materials they developed can also be used as luminescence solar concentrators.

Reminding that new concepts have been introduced in smart buildings in order to get maximum efficiency from solar energy, Keleştemur said, "With today's technology, the electricity needed by a building cannot be met entirely from the solar panel. For this, we will first coat the nanocrystals between the double glasses; we will collect the light from the sun and give it to the frames. Thus, without preventing people from seeing the outside." "Solar energy can be used more efficiently." he said.

Yusuf Keleştemur stated that the material in question can also be used in sensitive surgeries and said, "For example, in cancer surgery, these materials will only adhere to cancer cells and help these cells to completely separate from the tissue." said.

The Nobel Prize in Chemistry was also awarded to studies that form the basis of materials.

Keleştemur reminded that the foundations of the material they worked on were laid in the 1980s, and this year's Nobel Prize in Chemistry was awarded to studies on the "discovery and production of quantum dots".

Pointing out that the materials whose foundations were laid in those years enabled new discoveries, Keleştemur said, "Today, we want to produce these materials with much higher stability and efficiency and use them in commercial applications." said.


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