Research areas
Polymer optoelectronics.
Most polymers, or plastics, are electrical insulators. However there is one class of polymers, known as 'conjugated' polymers which can conduct electricity. These materials are semiconductors, and open new directions in optoelectronics. They combine novel semiconducting electronic properties with the processing flexibility of polymers. When a voltage is applied to them, they emit light, providing an important new display technology that could give flat and even flexible displays. Semiconducting polymers can be used to make field effect transistors, solar cells, and even lasers. In the polymer optoelectronics group we seek to understand the physics of these remarkable materials and devices, with the aim of improving them. The research has both fundamental and applied aspects, and the main activities are: - optical amplifiers - wavelength scale microstructure - new materials - charge transport in LEDs - understanding the light emission process
I am also researching fluorescence and its applications in medicine and biology.
For further information, see the Organic Semiconductor Centre and the Polymer Optoelectronics group website.
PhD supervision
- David Webster
- Madeleine Fisher
- Yuchen Zhang
- Thomas Sayner
- Liam King
- Egle Tankeleviciute
- Benedict Paulukiewicz
Selected publications
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Open access
A figure of merit for efficiency roll-off in TADF-based organic LEDs
Diesing, S., Zhang, L., Zysman-Colman, E. & Samuel, I. D. W., 28 Mar 2024, In: Nature. 627, 8005, p. 747–753 14 p., 627.Research output: Contribution to journal › Article › peer-review
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Open access
A novel carbazolophane: a comparison of the performance of two planar chiral CP-TADF emitters
Seibert, J., Xu, Y., Hafeez, H., Podlech, J., Favereau, L., Spuling, E., Waldhelm, C., Nieger, M., Fuhr, O., Hassan, Z., Crassous, J., Samuel, I. D. W., Zysman-Colman, E. & Bräse, S., 25 Apr 2024, (E-pub ahead of print) In: Advanced Functional Materials. EarlyView, 13 p.Research output: Contribution to journal › Article › peer-review
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Open access
Evaluation of acenes as potential acceptors in thermally activated delayed fluorescence emitters and the promise of a phenoxazine–naphthalene emitter for OLEDs
Lee, O. S., Sharma, N., Matulaitis, T., Slawin, A. M. Z., Olivier, Y., Samuel, I. D. W., Gather, M. C. & Zysman-Colman, E., 28 Mar 2024, In: Journal of Materials Chemistry C. 12, 12, p. 4273-4286 14 p.Research output: Contribution to journal › Article › peer-review
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Open access
Exciton diffusion to low engery sites of the acceptor drives charge photogeneration in D18:Y6 solar cells
Sayner, T., Ruseckas, A., Harwell, J. & Samuel, I. D. W., 30 Oct 2024, (E-pub ahead of print) In: Journal of Physical Chemistry C. ASAP, 10 p.Research output: Contribution to journal › Article › peer-review
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Open access
Highly efficient organic light-emitting diodes and light-emitting electrochemical cells employing multiresonant thermally activated delayed fluorescent emitters with bulky donor or acceptor peripheral groups
Wang, J., Hafeez, H., Tang, S., Matulaitis, T., Edman, L., Samuel, I. D. W. & Zysman-Colman, E., 3 May 2024, (E-pub ahead of print) In: Aggregate. Early View, 12 p., e571.Research output: Contribution to journal › Article › peer-review
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Open access
Improving the air stability of flexible top emitting organic light-emitting diodes
Riahi, M., Yoshida, K. & Samuel, I. D. W., 24 Aug 2024, In: npj Flexible Electronics. 8, 51.Research output: Contribution to journal › Article › peer-review
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Open access
Improving the uniformity of top emitting organic light emitting diodes using a hybrid electrode structure
Riahi, M., Yoshida, K., Hafeez, H. & Samuel, I. D. W., Jan 2024, In: Advanced Electronic Materials. 10, 1, 7 p., 2300675.Research output: Contribution to journal › Article › peer-review
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Open access
Multi-responsive thermally activated delayed fluorescence materials: optical ZnCl2 sensors and efficient green to deep-red OLEDs
Si, C., Gupta, A. K., Basumatary, B., McKay, A., Cordes, D. B., Slawin, A. M. Z., Samuel, I. D. W. & Zysman-Colman, E., 3 Mar 2024, (E-pub ahead of print) In: Advanced Functional Materials. Early View, 14 p., 2315935.Research output: Contribution to journal › Article › peer-review
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Open access
Photodynamic therapy offers a novel approach to managing miltefosine-resistant cutaneous leishmaniasis
Cabral, F., Riahi, M., Persheyev, S., Lian, C., Cortez, M., Samuel, I. D. W. & Ribeiro, M., Aug 2024, In: Biomedicine & Pharmacotherapy. 177, 116881.Research output: Contribution to journal › Article › peer-review
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Open access
Electrically driven organic laser using integrated OLED pumping
Yoshida, K., Gong, J., Kanibolotsky, A. L., Skabara, P. J., Turnbull, G. & Samuel, I. D. W., 28 Sept 2023, In: Nature. 621, p. 746-752Research output: Contribution to journal › Article › peer-review