About QDI Systems

News

Project "Quantum dot inks for direct conversion X-ray detectors".

QDI systems receives NWO Take-off phase 2 grant for the project "Quantum dot inks for direct conversion X-ray detectors"

QDI systems receives the Take-off phase 2 grant from the Dutch Research Council (NWO) for the…

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Title of the thesis: "PbS colloidal quantum dots for near-infrared optoelectronics".

Dima Bederak receives his PhD from the University of Groningen

Dima Bederak receives his PhD degree from the University of Groningen on his work on quantum dots. The title of the PhD thesis is "PbS…

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QDI systems becomes a member of Life Cooperative

The Healthy Ageing Business Cooperative contains world-class SMEs centered around Medical Technology & Devices, Molecules & Materials and Drug Development, Testing & Analysis. View the article here.

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Carduso and RHM invest in Groningen start-up QDI systems 'Quantum Dots': the next generation of in x-ray technology

Carduso Investments and RUG Holding (RHM) announced their investment in high tech startup QDI systems on Monday. The company is a spin-off from the Zernike Institute for Advanced…

News

Project "Developing prototype quantum dot X-ray detector".

SNN VIA+ subsidy granted

We are happy to announce that SNN approved our VIA+ subsidy application for project "Developing prototype quantum dot X-ray detector".

In recent years, unique know-how has been created by the…

News
Artem Shulga wins GEC PhD Thesis Prize 2020

Dr. Artem Shulga received the "Best GEC PhD Thesis Award" at the Annual Scientific Meeting of the Groningen Engineering Center (GEC). You can find his dissertation “Colloidal Quantum Dot Field-Effect Transistors - From Electronic Circuits to Light…

Developing the next generation of Quantum Dot X-ray sensors with unparalleled know-how

QDI systems is a high-tech start-up, spin-off from Zernike Institute for Advanced Materials, University of Groningen. At QDI systems, we develop imaging devices for medical applications based on quantum dots.

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Developing the next generation of Quantum Dot X-ray sensors with unparalleled know-how

Our technology

Quantum dots(QDs) are tiny solution-processable semiconductor nanoparticles. This class of materials emerged a few decades ago, but only recently QDs appeared in commercial products on the mass market.

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High X-ray absorption

Lead based quantum dots have one of the highest X-ray attenuation coefficients due to 85% mass fraction of lead in the conversion layer. 100 um film thickness is sufficient to absorb >95% photons used for mammography application.

Solution process

Quantum dot frontpane is deposited from solution and can be manufactured using spray-coating, slot-die coating or other conventional method depending on customer needs and specifications.

Low dose X-ray imaging

Due to low impact ionization energy, absorbed X-ray photons deposit larger amount of charge in the conversion layer, compared to conventional technologies. The charges are efficiently extracted to the backplane by applying as low as 0.5 V/um electric field. Together with low leakage current, this provides high signal-to-noise ratio even at low dose rates.

High resolution

Quantum dot based frontplane is truly amorphous, consisting of a few nanometer sized crystalline particles. This releases the limits of policrystalline materials where the resolution is constrained by tens of micrometer crystalline domains causing charge sharing between pixels. The resolution of Quantum dot sensors is virtually limited by the pixel size of the backplane.

Developing the next generation of Quantum Dot X-ray sensors with unparalleled know-how