An international team secures grant to develop perovskite-based X-ray detectors

A new project, one of eight that successfully secured funding from the Hebrew University of Jerusalem (HUJI) ' Zelman Cowen Academic Initiatives (ZCAI), Australia this year, will focus on developing X-ray detectors from metal halide perovskite materials.

Associate Professor Guohua Jia, from Curtin University's School of Molecular and Life Sciences, said X-ray detectors based on metal halide perovskites are highly sensitive, enabling a very low detection limit, meaning they could lower medical expenses and reduce the risk of radiation to patients.

'X-ray detection is widely used in medical diagnoses and the non-destructive inspection of luggage and industrial products at airports and other custom entry points,' Dr. Jia said. 'This modern X-ray imaging uses scintillator materials such as caesium iodide and gadolinium oxysulfide as photodetectors to convert the high-energy X-rays into visible light. The problem with this is that these materials are made of very expensive crystals grown at high temperatures, and they usually show low radioluminescence conversion efficiency.'

Dr. Jia said the team would investigate the use of a cheaper metal halide perovskite material made in solution at low temperatures, which is highly sensitive to X-ray irradiation, to fabricate X-ray detectors.

'Based on these materials, we believe we should be able to detect small doses of X-ray photons, converting them into visible light,' Dr. Jia said.

'The associated image can then be recorded using a low-cost, widely accessible digital camera.' Associate Professor Zongyou Yin from Australian National University and Dr. Ido Hadar from the Hebrew University of Jerusalem will work with Dr. Jia on this project.

The competitive funding scheme supports quality research in science, including medical science, and fosters international collaborations between Australian universities and the Hebrew University of Jerusalem, Israel.

The project has been funded for two years, starting in February 2022, with the support of AUD$150,000 (around USD $109,500) for both parties (AUS and HUJI) each year.