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Efficient Light Management by Textured Nanoimprinted Layers for Perovskite Solar Cells
journal contribution
posted on 2017-04-11, 00:00 authored by Marko Jošt, Steve Albrecht, Lukas Kegelmann, Christian M. Wolff, Felix Lang, Benjamin Lipovšek, Janez Krč, Lars Korte, Dieter Neher, Bernd Rech, Marko TopičInorganic–organic
perovskites like methylammonium-lead-iodide have proven to be an effective
class of materials for fabricating efficient solar cells. To improve
their performance, light management techniques using textured surfaces,
similar to those used in established solar cell technologies, should
be considered. Here, we apply a light management foil created by UV
nanoimprint lithography on the glass side of an inverted (p-i-n) perovskite
solar cell with 16.3% efficiency. The obtained 1 mA cm–2 increase in the short-circuit current density translates to a relative
improvement in cell performance of 5%, which results in a power conversion
efficiency of 17.1%. Optical 3D simulations based on experimentally
obtained parameters were used to support the experimental findings.
A good match between the simulated and experimental data was obtained,
validating the model. Optical simulations reveal that the main improvement
in device performance is due to a reduction in total reflection and
that relative improvement in the short-circuit current density of
up to 10% is possible for large-area devices. Therefore, our results
present the potential of light management foils for improving the
device performance of perovskite solar cells and pave the way for
further use of optical simulations in the field of perovskite solar
cells.