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Perovskite Breakthrough
Reviewed by Dr Srikanth Ponnada
Perovskite Breakthrough
Perovskite Breakthrough: Pioneering Low-Dose X-Ray Imaging Technologies
Perovskite single crystals have garnered significant attention recently due to their straightforward synthesis and superior optoelectronic characteristics, which encompass extended carrier diffusion lengths, elevated carrier mobility, minimal trap density, and a tunable absorption edge spanning from ultraviolet (UV) to near-infrared (NIR) that’s why it are emerging in electronic applications for instant solar cells, photo diodes, etc.
Study of low-Dose X-Ray Imaging Technology
Perovskite materials have garnered considerable interest as novel and effective X-ray detectors due to their distinctive characteristics relative to conventional X-ray detectors. The Applied Physics and Radiation Technologies Group of Sunway University and Bangabandhu Sheikh Mujibur Rahman Science and Technology University provide a comprehensive analysis of X-ray detection technologies utilizing organic–inorganic hybrids (OIHs), all-inorganic and lead-free perovskite material-based single crystals (SCs), as well as thin and thick films and wafers. This study systematically examines the progress of various synthesis processes, structural alterations, and device topologies utilized to improve radiation sensing capability. Their findings indicated that advancements in single crystallization techniques surpassed those in film and wafer growth techniques. The likely explanation for this is that SC-based devices exhibit a reduced trap density, elevated resistivity, more carrier mobility, and extended lifespan in comparison to film- and wafer-based devices. Ultimately, devices equipped with SCs demonstrated exceptional sensitivity and the minimal detectable dose rate (LDDR). In these studies, surpass those of certain conventional X-ray detectors, including amorphous selenium and CZT. The subpar performance of film-based devices is ascribed to defect generation inside the bulk film, on surfaces, and at grain boundaries. Nevertheless, wafer-based devices exhibited the poorest performance due to the creation of voids that obstruct the flow of charge carriers.
Conclusion
Perovskite materials have been extensively explored as X-ray radiation detectors for a wide range of applications in the fields of medical imaging, non-destructive industrial inspection, and safety screening. This study examined the creation and refinement of a cost-effective synthesis method, material development, and modifications to device architecture. The enhancement of crystallization techniques has overshadowed the methods for film and wafer growth. The advantage of crystallization methods is attributed to crystal-based, particularly SC-based, devices exhibiting lower trap density, better resistivity, and greater carrier mobility and longevity compared to film and wafer-based devices. The devices equipped with SCs demonstrated exceptional sensitivity and LDDR.
Image credits original authors https://pubs.rsc.org/en/content/articlehtml/2024/ra/d4ra00433g
Reference
Miah, M.H., Khandaker, M.U., Islam, M.A., Nur-E-Alam, M., Osman, H. and Ullah, M.H., 2024. Perovskite materials in X-ray detection and imaging: recent progress, challenges, and future prospects. RSC advances, 14(10), pp.6656-6698 https://pubs.rsc.org/en/content/articlehtml/2024/ra/d4ra00433g
Authored by Jyoti Verma
Jyoti Verma M.Sc
-Junior Scientific Content Author
Jyoti, as an accomplished researcher in the field of Physics, currently pursuing a PhD from Helmholtz zentrum dresden rossendorf, Germany. She holds a master's degree from the prestigious Indian Institute of Technology Jodhpur, having passed the IIT Joint Admission Test. She started her research journey with an internship at the Physical Research Laboratory in Ahmedabad, where she investigated ozone variation in the troposphere. Continuing to pursue her passion for atmospheric and physical sciences, they worked as research assistant at Academia Sinica, Taiwan. Her academic excellence is recognized with numerous awards, including the Gargi Award, Indira Priyadarshini Award, and the DST-Inspire Scholarship. Her strong interest in scientific writing led her to contribute as an author to SCIATLAS.
