Perovskite silicon tandem solar cells hold an immense promise as a new emerging technology as they showed efficiencies that broke the single junction limit. Growing conformal perovskite thin film layer on top of textured Si substrates in the micron range can add a lot of benefits as the deposition happens on the current state of art silicon solar cells in the industry so no need for additional step i.e. polishing, which would add to the total cost of production and increases the reflection losses reducing the overall efficiency.
In this work, we show how we grow conformal high quality perovskite crystals that take the shape of the textured silicon bottom substrates. We investigate the effect of different additives and annealing conditions on the crystallization dynamics of perovskite on top of the textured silicon substrates. By fine tuning the crystallization dynamics of perovskite to take the shape of the textured bottom cells, we were able to achieve high efficiency devices.
https://onlinelibrary.wiley.com/doi/full/10.1002/solr.202400471
The Borchert Lab 