The following is a sponsored post by TCI

Tokyo Chemical Industry Company Limited (TCI) is now offering new hole selective self-assembled monolayer (SAM) forming agents, 2PACz [C3663], MeO-2PACz [D5798] and Me-4PACz [M3359] for high performance perovskite solar cells and OPVs.

TCI SAM materials chart, structure and image

The new materials enable efficient, versatile and stable p-i-n perovskite solar cell devices. These materials are useful for tandem solar cells as they grant conformal coverage on rough textures. In fact, a perovskite solar cell that uses the SAM hole transport layer can realize more than 20% efficiency without using dopants or additives. Perovskite-Silicon tandem solar cells that use Me-4PACz as a hole contact material realized 29.15% efficiency. Costs are lowered thanks to extremely low material consumption, and the processing is very simple and scalable.

Processing of the SAMs can be done using dip coating, which is suitable for large-area coating and textured substrates, as well as spin coating - suitable for fast research & optimization. The SAMs can be processed within wide processing windows with higher reproducibility than current standard hole transport materials (like PTAA).

TCI SAM materials molecules

Since early reports were published by perovskite pioneer Miyasaka et al., perovskite solar cells have been studied vigorously. Despite many advances and achievements, one of the remaining bottlenecks towards large-scale production is in the hole transport layer. Some conventional hole transport materials, Spiro-OMeTAD and PTAA, involve high costs and are destabilized due to the use of a necessary dopant for carrier transport. Now, thanks to the new 2PACz, MeO-2PACz and Me-4PACz, materials developed by Getautis, Albrecht et al., these challenges can be better addressed.

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