Dr. Wing Chung Tsoi is a senior research officer at Swansea University, having joined in 2014. His research group focuses on advanced characterisation techniques to further understand the structure-property-performance relationship of photovoltaic cells, with the aim to improve device stability and power conversion efficiency. Dr Tsoi’s group are also working on new applications of organic/perovskite photovoltaic cells, including for indoor light harvesting, semi-transparent solar cells and solar cells for space applications.
The group have used a Linkam RH95 humidity system alongside the THMS600-H to conduct in-situ Raman Spectroscopy to further understand the degradation kinetics of perovskite photovoltaic cells . Furthermore, they are using a Linkam LTS420E-PB4 to measure Raman spectroscopy and local photocurrent at the same device region, which provide direct correlation between degradation and the optoelectronic properties.  They are also using the Linkam LTS420E-PB4 to do extreme thermal cycling on organic solar cells to study their feasibility for space applications. 
Dr Tsoi’s group particularly specialise in advanced Raman techniques, and stability characterisation. Their aim to improve the function of perovskite photovoltaic materials could have great benefits for the future development of low cost, high efficiency solar cells.
 K.E.A. Hooper, H. K.H. Lee, M. J. Newman, S. Meroni, J. Baker, T. M. Watson and W. C. Tsoi, Phys. Chem. Chem. Phys. 19, 5246 (2017)
 J. Barbé, V. Kumar, M. J. Newman, H. K.H. Lee, S. M. Jain, H. Chen, C. Charbonneau, C. Rodenburg, W. C. Tsoi, Sustainable Energy & Fuels, 2, 905 (2018)
 H. K. H. Lee, J. R. Durrant, Z. Li, W. C. Tsoi, J. Mater. Res. 33, 1902 (2018)