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Optoelectronic Materials and Device Spectroscopy Group (StranksLab)

Our research focuses on the optical and electronic properties of emerging semiconductors for low-cost, transformative electronics applications including light-harvesting (e.g. photovoltaic) and light-emission (eg LED) devices. We use optical spectroscopy to understand material and device photophysics on a range of length and time scales, and relate these characteristics directly to local chemical, structural and morphological properties through multimodal measurements. This provides a unique platform to discover new semiconducting materials, unveil power loss mechanisms in devices, guide innovative device designs, and push device performance to the limits. Our developed devices and in-situ and in-operando imaging approaches are applicable to a range of fields including energy materials, medical imaging and biological systems. We also have a strong emphasis in the group on making our work accessible to the public through a number of outreach and media activities.


  • Bowman, A.R.; Anaya, M; Greenham N.C.; *Stranks, S.D. Quantifying Photon Recycling in Solar Cells and Light-Emitting Diodes: Absorption and Emission Are Always Key Phys. Rev. Lett. 2020, DOI:10.1103/PhysRevLett.125.067401
  • Doherty, T. A. S.; Winchester, A, J.; Macpherson, S. M.; Johnstone, D. N.; Pareek, V.; Tennyson E. M.,; Kosar, S.; Kosasih, F. U.; Anaya, M.; Abdi-Jalebi, M.; Andaji-Garmaroudi, Z.; Wong, E. L.; Madéo, J.; Chiang, Y.-H.; Park, J.-S.; Jung, Y.-K.; Petoukhoff, E. C.; Divitini, G.; Man, M. K. L.; Ducati, C.; Walsh, A.; Midgley, P. A.; *Dani, K.; *Stranks, S. D. Visualising Performance-Limiting Nanoscale Trap Clusters at Grain Junctions in Halide Perovskites Nature 2020, DOI: 10.1038/s41586-020-2184-1
  • Kubicki, D. J.; Prochowicz, D.; Salager, E.; Rakhmatullin, A.; *Grey, C. P.; *Emsley, L.; *Stranks, S. D. Local Structure and Dynamics in Methylammonium, Formamidinium and Cesium Tin(II) Mixed-Halide Perovskites from 119Sn Solid-State NMR J. Am. Chem. Soc2020, DOI: 10.1021/jacs.0c00647
  • †Feldmann, S.; †Macpherson, S.; Senanayak, S. P.; Abdi-Jalebi, M.; Rivett, J. P. H.; Nan, G.; Tainter, G. D.; Doherty, T. A. S.; Frohna, K.; Ringe, E.; Friend, R. H.; Sirringhaus, H.; Saliba, M.; Beljonne, D.; *Stranks, S. D.; *Deschler, F. Photo-doping through local charge carrier accumulation in alloyed hybrid perovskites for highly efficient luminescence, Nature Photonics, 2020, 14123-128
  • Anaya, M.; Rand, B. P.; Holmes, R. J.; Credgington, D.; Bolink, H. J.; Friend, R. H.; Wang, J.; Greenham, N. C.; *Stranks, S. D. Best practices for measuring emerging light-emitting diode technologiesNature Photonics, 2019, 13818–821
  • deQuilettes, D. W.; Frohna, K.; Emin, D.; Kirchatz, T.; Bulovic, V.; Ginger, D. S.; *Stranks, S. D. Charge-Carrier Recombination in Halide PerovskitesChemical Reviews2019, 11911007-11019
  • Tennyson, E. M.; Doherty, T. A. S.; Stranks, S. D. Heterogeneity at multiple length scales in halide perovskite semiconductors, Nature Reviews Materials, 2019, 4573-587
  • *Stranks, S. D.; *Plochocka, P. The Influence of the Rashba Effect, Nature Materials, 2018, 17, 381-382
  • Abdi-Jalebi, M.; Andaji-Garmaroudi, Z.; Cacovich, S.; Stavrakas, C.; Philippe, B.; Richter, J. M.; Alsari, M.; Booker, E. P.; Hutter, E. M.; Pearson, A. J., Lilliu, S.; Savenije, T. J.; Rensmo, H.; Divitini, G.; Ducati, C.; Friend, R. H.; *Stranks., S. D. Maximising and Stabilising Luminescence in Halide Perovskite Device Structures Using Potassium-Halide Passivating Layers, Nature, 2018, 555, 497-501
  • Hutter, E. M.; Gelvez-Rueda, M. C.; Osherov, A.; Bulovic, V.; Grozema, F. C.; *Stranks., S. D.; *Savenije, T. J. Direct-indirect Character of the Bandgap in Methylammonium Lead Iodide Perovskite, Nature Materials, 2017, 16 115-120
  • *Stranks, S. D.; Petrozza, A. Revisiting Photocarrier Lifetimes in Photovoltaics Nature Photonics, 2016, 10, 562



 RoyalSocietyFunding                               Faraday Institute European Commission

We acknowledge generous support from the European Research Council (HYPERION), the Royal Society, the Engineering and Physical Sciences Research Council, the Faraday Institute and the European Commission.