We are inviting abstracts for early career research talks and poster presentations. Please send to: cpe-admin@imperial.ac.uk. The RSC is offering three 拢100 RSC book vouchers from听Materials Horizons,听Journal of Materials Chemistry C听补苍诲听RSC Applied Interfaces听for poster prizes.
Agenda and abstracts will be posted as they are received
13 July 2026
Confirmed speakers include:
- Prof , Radiation detection using solution processed organic (and organic-inorganic hybrid) films
- Dr
14 July 2026
Confirmed speakers include:
- Dr
Attendance is free, but we ask that you do register:
ABSTRACTS
From imaging to implantable dosimeters: The journey of bulk heterojunction radiation sensors
Dr Imalka Jayawardena
Advanced Technology Institute, School of Computer Science and Electronic Engineering, University of Surrey, Guildford, Surrey, GU2 7XH.
X-ray detectors are a key element in modern healthcare diagnostics, cancer therapy, homeland security and non-destructive evaluation among many fields. However, the potential applications of X-ray detectors are limited by several factors including the system cost, areal limitations, and the requirement for thick crystals for efficient X-ray attenuation which in turn limits conformability on complex shapes and imposes a requirement for high operating voltages for efficient charge extraction/signal generation.
The use of bulk heterojunctions comprising of organic semiconductors and X-ray attenuating nanoparticles have emerged as an alternate technology that has the can address some of the limitations with conventional X-ray detector technologies. For example, the solution processable nature of these blends allows for fabrication of large area detectors on flexible substrates that can conform to complex shapes.
Here I will discuss the progress made by our group over the last decade on pushing the application space of these detectors. Starting from our observations and developments on the unusual broadband response (from keV to MeV range) of this system[1], I will discuss some of our early work on rigid imaging systems[2], to more conformable dose mapping systems targeting improved cancer therapy[3]. The talk will also discuss how we overcame rather high dark currents [4] through a simple device engineering step and how in our recent work, we are expanding the application space of these detectors to implantable architectures [5,6] as a probe for dose measurement closer to tumor sites.
References
[1] Thirimanne, H.M., Jayawardena, K.D.G.I., Parnell, A.J. et al. Nat Commun 9, 2926 (2018). [2] Jayawardena, K.D.G.I., Thirimanne, H.M., Tedde, S.F. et al. ACS Nano 13, 6973 (2019). [3] Thirimanne, H.M., Jayawardena, K.D.G.I., Nisbet A. et al. IEEE Trans. Nucl. Sci. 67 (2020). [4] Nanayakkara M.P.A., Matja膷i膰, L., Wood, S. et al. Adv. Func. Mater. 31, 2008482 [5] Nanayakkara, M.P.A., Masteghin, M.G., Basiric貌, L. et al. Adv. Sci. 9, 2101746 (2022). [6] Nanayakkara, M.P.A., He, Q. Ruseckas, A. et al. Adv. Sci. 10 (35), 2304261 (2023).