Understanding the Effect of Perovskite Morphology on the Performance of Groove-based Back-Contact Solar Cells
Dominic Blackburn a b, Nathan Hill b, Dumitru Sirbu b, Nic Mullin a, David Lidzey a c
a Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, United Kingdom
b Power Roll Ltd, Turbine Way, 2, Sunderland, United Kingdom
c Ossila, Windsor Street, Sheffield, United Kingdom
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
London, United Kingdom, 2023 June 12th - 14th
Organizers: Tracey Clarke, James Durrant and Trystan Watson
Poster, Dominic Blackburn, 270
Publication date: 30th March 2023

In recent years, research into perovskite solar cells has seen great strides, leading to flat cells with efficiency over 25%. Back-contact perovskite solar cells are an alternative architecture that feature all transport materials and electrodes to the rear of the device. This allows them to reduce the losses associated with the parasitic absorption of the layers between the light absorber and light source, and thus allows these devices to show potential in improving on photovoltaic performance. V-groove based devices developed by Power Roll Ltd are a novel form of back-contact device that are deposited onto flexible plastic substrates through roll-to-roll processing. Devices with this structure can build up impressive Voc’s over small areas. We have investigated the crystal morphology of perovskites deposited within these micron-scale grooves using a variety of methods, including AFM, SEM, and confocal microscopy. Through these studies, and with comparison to the equivalent thin films, the efficiency of these devices can be further optimised.

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