Mike Stringer

Cohort 1


Working with Power Roll Limited to develop their novel back contact, flexible solar substrate. I am based in the University of Sheffield laboratories in the electronic and photonic molecular materials research group (EPMM).

My recent publications are:

1. Michael Wong-Stringer, James E. Bishop, Joel A. Smith, David K. Mohamad, Andrew J. Parnell, Vikas Kumar, Cornelia Rodenburg and David G. Lidzey, Efficient perovskite photovoltaic devices using chemically doped PCDTBT as a hole-transport material, J. Mater. Chem. A, 2017, 5, 15714–15723 DOI: 10.1039/c7ta03103c. https://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta03103c#!divAbstract

2. Michael Wong-Stringer, Onkar S. Game, Joel A. Smith, Thomas J. Routledge, Bakhet A. Alqurashy, Benjamin G. Freestone, Andrew J. Parnell, Vikas Kumar, Majed O. A. Alawad, Ahmed Iraqi, Cornelia Rodenburg and David G. Lidzey, High performance multi-layer encapsulation for perovskite photovoltaics Completed, Advanced Energy Materials, 2018, 8, 24, 1801234 DOI: 10.1002/aenm.201801234 https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201801234

3. Michael Wong-Stringer, Thomas J. Routledge, Onkar S. Game, Joel A. Smith, James E. Bishop, Naoum Vaenas, Benjamin G. Freestone, David M. Coles, Trevor McArdle, Alastair R. Buckley, and David G. Lidzey, Low-temperature, high-speed reactive deposition of metal oxides for perovskite solar cells, Journal of Materials Chemistry A, 2019, Advance Article. DOI: 10.1039/C8TA10827G https://pubs.rsc.org/en/content/articlelanding/2019/ta/c8ta10827g#!divAbstract


1) Perovskite photovoltaic devices 2) Back Contact PSCs

1) A focus on new perovskite precursors, charge transport layers and encapsulations methods to simultaneously improve efficiency and stability of perovskite solar cells. 2) Back-contact perovskite solar cells are fabricated by depositing methylammonium lead iodide perovskite into micron-sized grooves, with opposite walls of each groove being coated with either n- or p-type selective contacts. V-shaped grooves are created by embossing a polymeric substrate, with the different charge-selective electrodes deposited onto the walls of the groove using a directional evaporation technique. We show that individual grooves act as photovoltaic devices, having a power conversion efficiency of up to 7.3 %. By series-connecting multiple grooves, we create integrated micro-modules that build open circuit voltages up to nearly 15 V and power conversion efficiencies over 4 %. The devices created are fully flexible, do not include rare metals, and are processed using techniques applicable to roll-to-roll processing.