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Home > Materials > Self-assembled monolayer materials

Self-assembled monolayer materials

Self-Assembled Monolayers (SAMs) are ordered arrays of organic molecules formed by the spontaneous adsorption onto a surface of molecular constituents from a vapor or liquid phase. The molecules or ligands that form SAMs are chemically functionalized in order to have a higher affinity to the surface. Historically, SAMs have been effectively used to improve the surface properties of light-emitting diodes and field-effect transistors. In photovoltaics, SAMs have been proven as an effective strategy to improve the device performance of organic solar cells (Adv. Energy Mater. 2022, 12, 2202503, DOI: 10.1002/aenm.202202503) and dye-sensitized solar cells. (J. Mater. Chem., 2012, 22, 2915-2921, DOI: 10.1039/C1JM12317C) Lately, the interests of deploying SAMs as benchmarking hole-transport materials for perovskite solar cells have increase rapidly. The introduction of self-assembled monolayers (SAMs) has interesting impacts as due to chemical bonding it introduces a dipole moment at the interface, tuning the surface electronics and interfacial crystal defects. Moreover, the incorporation of functional groups coordinating with perovskite can be used in modifying the film growth, resulting in a better morphology and, more importantly, enhanced stability. So far, several ground breaking Si/Perovskite tandem devices with record efficiencies approaching or over 30% have been successfully demonstrated (1, Science. 370, 2020, 1300-1309, DOI: 10.1126/science.abd4016; 2, Nat. Nanotechnol. 17, 1214-1221 (2022), DOI: 10.1038/s41565-022-01228-8). Dyenamo offers several series of SAMs, ranging from with various linker (spacer) lengths (2PAC, 3PAC, 4PAC, 5PACz and 6PACz) in combination with different carbazole ending groups (H, Me, MeO, F, Cl, Br and I). The broad Dyenamo portfolio opens for systematic studies and optimization. Other SAM molecules than the ones in the table below can be ordered on demand. Please send a message to info@dyenamo.se.

Difficulties in identifying the right SAM for your devices? Then, please contact us.

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