Dr Wing Chung Tsoi is a Lecturer. His research interests are mainly focus on solution-process photovoltaic/solar cells, including organic solar cells, perovskite solar cells...He is particularly interested in understanding the structure-property-performance relationship of the photovoltaic/solar cells, in order to understand the fundamentals and to improve the performance, particularly the stability of the photovoltaic/solar cells. His expertise is on developing/applying advanced (nano-) characterization methods to probe the structures/morphology of the photovoltaic thin films, and correlate it to the properties and performances. His particularly expertise is on advanced Raman spectroscopy and functional atomic force microscopy (AFM) as well as photovoltaic cells for indoor, power generation window and aerospace applications. 

Areas of Expertise

  • Raman spectroscopy
  • Organic solar cells
  • Degradation Studies
  • Novel application of photovoltaics
  • advanced characterization of printable solar cells


  1. Barbé, J., Hughes, D., Wei, Z., Pockett, A., Lee, H., Heasman, K., Carnie, M., Watson, T., Tsoi, W., Tsoi, W. Radiation Hardness of Perovskite Solar Cells Based on Aluminum‐Doped Zinc Oxide Electrode under Proton irradiation Solar RRL
  2. Way, A., Luke, J., Evans, A., Li, Z., Kim, J., Durrant, J., Hin Lee, H., Tsoi, W., Tsoi, W. Fluorine doped tin oxide as an alternative of indium tin oxide for bottom electrode of semi-transparent organic photovoltaic devices AIP Advances 9 8 085220
  3. Guo, R., Khenkin, M., Arnaoutakis, G., Samoylova, N., Barbé, J., Lee, H., Tsoi, W., Katz, E., Tsoi, W. Initial Stages of Photodegradation of MAPbI3 Perovskite: Accelerated Aging with Concentrated Sunlight Solar RRL 1900270
  4. Speller, E., Clarke, A., Luke, J., Lee, H., Durrant, J., Li, N., Wang, T., Wong, H., Kim, J., Tsoi, W., Li, Z., Tsoi, W. From fullerene acceptors to non-fullerene acceptors: prospects and challenges in the stability of organic solar cells Journal of Materials Chemistry A
  5. Lakhiani, H., Dunlop, T., Rossi, F., Dimitrov, S., Kerremans, R., Charbonneau, C., Watson, T., Barbé, J., Tsoi, W., Charbonneau, C., Tsoi, W. Variations of Infiltration and Electronic Contact in Mesoscopic Perovskite Solar Cells Revealed by High‐Resolution Multi‐Mapping Techniques Advanced Functional Materials 1900885

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  • EG-086 Engineering Science

    This module introduces students to basic physics including mechanical, thermal, electrical and optical properties of matter.

  • EGA106 Engineering Science

    This module introduces students to basic physics including mechanical, thermal, electrical and optical properties of matter.


  • Stability and upscaling of OPV (current)

    Other supervisor: Prof James Durrant
  • Transparent Conductive Glass Substrates for PV Application (current)

    Other supervisor: Prof James Durrant
  • Fabrication and characterisation of flexible perovskite solar cells for space applications (current)

    Other supervisor: Prof Trystan Watson
  • Semi-transparent Organic Solar Cells (current)

    Other supervisor: Prof Trystan Watson
  • Feasibility of Perovskite Solar Cells for Space Applications (current)

    Other supervisor: Prof Trystan Watson
  • Advanced Raman-based Mapping of Perovskite Solar Cells. (awarded 2020)

    Other supervisor: Dr Jeremy Barbe
  • The Role of Electron Acceptors (awarded 2019)

    Other supervisor: Prof James Durrant
  • 'Raman spectroscopy for advanced study of printable solar cells' (awarded 2018)

    Other supervisor: Prof Trystan Watson

Additional Information

Dr Wing Chung Tsoi obtained his higher diploma in Applied Physics from The Hong Kong Polytechnic University. He then obtained BSc in Physics with Lasers and Photonics from The University of Hull. He obtained his PhD in Physics (Title of Thesis: Polymerisable Liquid Crystals for Organic Photovoltaics) under supervision of Prof. Mary O'Neill at The University of Hull in 2006.

During his PhD, he discovered novel light absorbing, charge transporting liquid crystals can be used as PV materials and to fine tune its nano-morphology to significantly improve the efficiency of the PV. [1] He then took a postdoctoral position under Prof. David Lidzey at The University of Sheffield, working on organic semiconducting materials for novel ultrafast optical switching. During the period, he discovered that an interesting and special phase, so called "beta-phase" can be formed with fluorene oligomers. [2]

From 2009, he obtained a EPSRC-NPL postdoctoral partnership which allowed him to work both at Imperial College (under Dr Ji-Seon Kim) and National Physical Laboratory (NPL). During the period, he was able to apply resonant Raman spectroscopy as a simple and powerful way to quantify the degree of molecular order in organic photovoltaic films. [3], and also co-developed with NPL a photo-conductive AFM. [4]

From 2012, he participated in a TSB project (under Dr Ji-Seon Kim and Prof. Donal Bradley), and demonstrated that Raman can be a valuable technique to probe degradation of organic PV [5], and also fabricated the first (UK academics) large area organic PV module with efficiency as high as 4% on FTO substrate using scalable fabrication methods.

From 2014, he was awarded Knowledge Transfer Secondment (KTS) under Prof. Jenny Nelson (Imperial College) and Dr Fernando Castro (NPL) on advanced methods to characterize degradation of organic PV modules. From September 2014, he took up the current position, and is developing a research group on advanced characterization of PVs, particularly on advanced Raman techniques, [6] and stability characterization.[7]. As well as photovoltaic cells for indoor,[8] power generation window [9] and aerospace applications. [10]

[1] Adv. Mater. 18, 1754 (2006)
[2] Adv. Funct. Mater. 18, 600 (2008)
[3] J. Am. Chem. Soc. 133, 9834 (2011)
[4] Energy Environ. Sci. 4, 3646 (2011)
[5] Nat. Commun. 4, 2227 (2013)
[6] Adv. Funct. Mater. 29, 1900885 (2019)
[7] ACS Energy Lett. 4, 846 (2019)
[8] Appl. Phys. Lett. 108, 253301 (2016)
[9] AIP Adv. 9, 085220 (2019)
[10] J. Mater. Res. 33, 1902 (2018)