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Temperature Dependent Photoluminescence and Transient Absorption of Organic Co-crystals

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Temperature Dependent Photoluminescence and Transient Absorption of Organic Co-crystals

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Organic photofunctional co-crystals have attracted immense interest thanks to their unique properties, ranging from their high photoluminescence (PL) efficiency and flexible semiconducting functionality to their unique molecular stacking. Co-crystals have been used to develop organic lightemitting transistors (OLETs) and organic solid-state lasers (OSSLs), as well as for upconversion emission, bioimaging, and optical waveguides. The majority of the reported co-crystal structures are based on extensively planar and rigid constituents. This results in weak intermolecular interactions limiting the overall optoelectronic efficiency of the co-crystals, including charge-transfer (CT) and thermally activated delayed fluorescence (TADF).

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