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12 March 2024 Synergetic enhancement of luminescence and ferroelectric properties through side chain interactions of luminophores
Eunkyoung Kim
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Proceedings Volume PC12883, Organic Photonic Materials and Devices XXVI; PC1288302 (2024) https://doi.org/10.1117/12.3005479
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Synergetic enhancement of luminescence and ferroelectric (SELF) properties was achieved from the materials comprising a central luminophore (L) core with side chain groups, where side chain groups consist of a self-assembling group (SAG). LS molecules self-assembled through the intermolecular interaction of SAGs, inducing aggregation of luminophores. This was evidenced by the quenching of emission at SAGs (Eclip) accompanied by aggregation-induced emission enhancement of L units (EAIE). These LS molecules showed strong photoluminescence in a dilute solution and a significant EAIE in aqueous organic solution. LS film demonstrated SELF properties with high quantum yield of photoluminescence and ferroelectric switching. TPC4 was employed in light emitting electrochemical cells to achieve high luminance under pulsed current conditions. LS films exhibited high remnant polarization and piezoelectric constants at room temperature. Consequently, the SELF properties were employed in a piezoelectric nanogenerator, producing piezoelectric output under repeated bending. These results indicate that side chain interactions resulted in unprecedented flexible SELF properties in a single compound.
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Eunkyoung Kim "Synergetic enhancement of luminescence and ferroelectric properties through side chain interactions of luminophores", Proc. SPIE PC12883, Organic Photonic Materials and Devices XXVI, PC1288302 (12 March 2024); https://doi.org/10.1117/12.3005479
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KEYWORDS
Materials properties
Luminescence
Molecular interactions
Molecules
Photoluminescence
Quantum efficiency
Quantum enhancement
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