Professor Trystan Watson
Professor
Engineering
Telephone: (01792) 295509
Room: Academic Office - A230
Second Floor
Engineering East
Bay Campus

Specialist Subjects:

Thin Film Photovoltaics
Deposition and Curing
Scaling
Electrochemical Characterisation
Corrosion
Dye-Sensitized Solar Cells
Organolead Halide Perovskite
Kesterite CZTS

Research

My research area is thin film printed PV with a specialism in developing new technologies for the manufacture of novel photovoltaics including deposition and curing processes and their characterisation using electrochemistry, photochemistry or optoelectronic methods

At present there is a renaissance in thin film printed photovoltaics and typically these developments currently reside in the laboratory environment. My research goal is to take these material sets and develop the manufacturing pipeline for fabrication at scale. A three pronged approach is employed to achieve this end (i) determination of loss mechanisms associated with scale – decreases in performance when increasing from lab scale to pilot scale. (ii) Addressing process bottlenecks to reduce fabrication time (iii) Architectural translation - ensuring the widest range of substrates by building devices on sheet processed glass and roll to roll metal or plastic

In particular my research activity entails coating and curing of photoactive materials, lab and sub-module scale manufacture of PV devices as well as characterisation of photoactive materials both via electrochemical and optoelectronic methods. The research stretches across a number of different technologies: liquid based dye-sensitized solar cells, solid state dye-sensitized solar cells, organolead halide perovskites and more recently kesterite CZTS (Cu2ZnSnS4).

Publications

  1. & Thin Film Tin Selenide (SnSe) Thermoelectric Generators Exhibiting Ultralow Thermal Conductivity. Advanced Materials 30(31), 1801357
  2. All printable perovskite solar modules with 198 cm² active area and over 6% efficiency. Advanced Materials Technologies
  3. & Outdoor performance monitoring of perovskite solar cell mini-modules: Diurnal performance, observance of reversible degradation and variation with climatic performance. Solar Energy 170, 549-556.
  4. & Engineering of a Mo/SixNy Diffusion Barrier to Reduce the Formation of MoS2 in Cu2ZnSnS4 Thin Film Solar Cells. ACS Applied Energy Materials 1(6), 2749-2757.
  5. & An effective approach of vapour assisted morphological tailoring for reducing metal defect sites in lead-free, (CH 3 NH 3 ) 3 Bi 2 I 9 bismuth-based perovskite solar cells for improved performance and long-term stability. Nano Energy 49, 614-624.

See more...

Teaching

  • EG-108 Engineering Sustainability

    To understand what sustainability is, why it is important and how engineering can be carried out in a sustainable way. ¿sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.¿ (Bruntland Commission, UN, 1987) The three ¿pillars¿ of sustainability are protection of the environment, stable and profitable business economics and a healthy society. The module aims to inspire engineers through good case studies and to show how engineers can contribute to all three aspects of this ¿triple bottom line¿.

  • EG-183 Materials Resources

    Materials resources are and always have been a controlling factor in economic and social human development. This course assumes no prior knowledge and explores the development of materials exploitation from the earliest times illustrating how the availability of resources and the ingenuity of humankind to exploit and extract new materials has allowed the evolution of our modern world. In historical terms, materials exploitation has always been related to economic growth or military needs. Increasingly, sources of energy and materials are sought which are both economically attractive and sustainable. As such, in each section of the course, aspects of sustainability and economics will be addressed, to show how and why certain materials choices are made for specific applications.

  • EG-279 Functional and Smart Materials

    This module covers the underlying scientific principles behind the physical properties of functional and smart materials. It provides the basis for electrical conductivity, semiconductivity, superconductivity as well as optical, magnetic and thermal properties. The ways in which these properties can be utilised in a wide range of devices is explored. Module Aims: to introduce the scientific principles behind the physical properties of functional and smart materials and to explore the manufacture of functional devices.

  • EGTM99 Functional Coatings

    Historically coatings have been relatively benign with developments focussing on increased lifetime or greater control of colour and adhesion. In recent years industry and society have demanded increased functionality for coatings and no more so than in the world of construction. Every year millions up millions of square meters of painted cladded material is produced in the UK. By functionalising just a small percentage of this output to generate, store and release energy it is possible to have a huge impact in the energy and climate challenges set by government. This module will furnish the students with information and knowledge on the various photovoltaic technologies under development, paying particular attention to technologies that utilise earth abundant, environmentally friendly materials. The course will require students to make a solar cell in the laboratory and perform measurements on its efficiency.

Supervision

  • Application of perovskite solar cells onto flexible steel substrates (current)

    Student name:
    EngD
    Other supervisor: Dr Eifion Jewell
  • Glass Substrates for PV applications (current)

    Student name:
    EngD
    Other supervisor: Dr Justin Searle
  • The challenges of scale for CZTS solar cells (current)

    Student name:
    EngD
    Other supervisor: Prof David Worsley
  • Multispectral manufacturing: Making light work of steel processing (current)

    Student name:
    PhD
    Other supervisor: Dr Eifion Jewell
  • 'Stability and encapsulation studies of perovskite solar cells' (current)

    Student name:
    PhD
    Other supervisor: Prof David Worsley
  • 'Optimisation of Perovskite Solar Cells For Slot-Die Coating' (current)

    Student name:
    PhD
    Other supervisor: Dr Matthew Carnie
  • Module design and patterning for fully printable perovskite solar cells (current)

    Student name:
    PhD
    Other supervisor: Dr Eifion Jewell
  • Precursor Formulation and Ink Jet Processing of TiO2 Compact Layers for the Manufacture of Photovoltaic Devices (current)

    Student name:
    PhD
    Other supervisor: Dr Cecile Charbonneau
  • 'Raman spectroscopy for advanced study of printable solar cells' (awarded 2018)

    Student name:
    MSc
    Other supervisor: Dr Chung Tsoi
  • 'New insights into modern nanostructured PV technology. The latest thermal and infrared analysis in hyphenated systems' (awarded 2017)

    Student name:
    MSc
    Other supervisor: Miss Katherine Hooper