+44 (0)141 330 1763
School of Chemistry, Joseph Black Building, University Avenue, Glasgow, G12 8QQ, U.K.
MSci, Physics and Astronomy
Department of Physics, University of Durham, U.K.
PhD, Organic Semiconductor Optoelectronics Group
School of Physics & Astronomy, University of St Andrews, U.K.
PDRA, Organic Semiconductor Centre
School of Physics & Astronomy, University of St Andrews, U.K.
PDRA, Lupton Group
Institut für Experimentelle und Angewandte Physik, University of Regensburg, Germany
Lecturer in Chemical Physics
School of Chemistry, University of Glasgow, U.K.
Senior Lecturer in Chemical Physics
School of Chemistry, University of Glasgow, U.K.
My expertise is in the spectroscopy of organic semiconductors. I have extensive experience of ultrafast photophysics, including fluorescence upconversion and transient absorption. After a PhD in ultrafast spectroscopy (Ifor Samuel, St Andrews), postdoctoral work in St Andrews and Regensburg, Germany (John Lupton) I was appointed lecturer in chemical physics in Glasgow in 2018, establishing my research group. Our specialisation is in advanced single molecule spectroscopy of light emitting materials used in light emitting diodes, lasers and photovoltaic cells. We have a fully equipped single molecule microscopy lab and develop new techniques as well as measure a wide variety of materials used in organic semiconductor devices. In 2022 I was promoted to senior lecturer (Associate Prof. equivalent).
Selected publications are shown below. See the group publications page for a full list.
G.J. Hedley, A.J. Ward, A. Alekseev, C.T. Howells, E.R. Martins, L.A. Serrano, G. Cooke, A. Ruseckas & I.D.W. Samuel, Determining the optimum morphology in high-performance polymer-fullerene organic photovoltaic cells, Nature Communications, 4, 2867 (2013), DOI: 10.1038/ncomms3867
L. Bergmann, G.J. Hedley, T. Baumann, S. Bräse & I.D.W. Samuel, Direct observation of intersystem crossing in a thermally activated delayed fluorescence copper complex in the solid state, Science Advances, 2, 1 (2016), DOI: 10.1126/sciadv.1500889
G.J. Hedley, A. Ruseckas & I.D.W. Samuel, Light Harvesting for Organic Photovoltaics, Chemical Reviews, 117, 2 (2017), DOI: 10.1021/acs.chemrev.6b00215
C. Ni, G.J. Hedley, J.L. Payne, V. Svrcek, C. McDonald, L.K. Jagadamma, P. Edwards, R. Martin, G. Jain, D. Carolan, D. Mariotti, P. Maguire, I.D.W. Samuel & J.T.S. Irvine, Charge carrier localised in zero-dimensional (CH3 NH3)3 Bi2I9 clusters, Nature Communications, 8, 170 (2017), DOI: 10.1038/s41467-017-00261-9
G.J. Hedley*, T. Schröder, F. Steiner, T. Eder, F.J. Hofmann, S. Bange, D. Laux, S. Höger, P. Tinnefeld, J.M. Lupton & J. Vogelsang*, Picosecond time-resolved photon antibunching measures nanoscale exciton motion and the true number of chromophores, Nature Communications, 12, 1327 (2021), DOI: 10.1038/s41467-021-21474-z
Key metrics (web of science derived) on my output include:
h-index of 19.
2013 Nature Communications paper cited over 270 times.
2017 Chemical Reviews article cited over 350 times.
Average of over 20 citations per paper published.