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Heteronuclear Complexes Containing Pt(II) and Ag(I) Centers: Application to Efficient Light-Emitting Electrochemical Cells
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We report the synthesis of novel ionic heteronuclear Pt(II)−Ag(I) complexes derived from Pt(NCN)-CCR precursors (R= aryl), where Ag+ ions coordinate to the acetylene groups. The photophysical investigation reveals a complex interplay of emissions: 3MLCT and 3LC states from the Pt(NCN) units, 3LC emissions from the R aryl groups, and 3MMLCT emissions arising from aggregated Pt(NCN)-X units in the solid state. These complexes exhibit photoluminescence in the range of 650−750 nm, predominantly from 3MMLCT states facilitated by short Pt···Pt contacts. Utilizing complex 4c (R = phenanthryl) as the ionic emitter in proof-of-concept LEECs, we achieved a maximum EQE of 4.1% and a luminance of nearly 2000 cd m−2. These results represent one of the highest-performing LEECs incorporating Pt(II)-based phosphorescent complexes, underscoring their potential in light-emitting applications.
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LÁZARO PALACIOS, Ariadna, et al. Heteronuclear Complexes Containing Pt(II) and Ag(I) Centers: Application to Efficient Light-Emitting Electrochemical Cells. ACS Applied Materials & Interfaces. 2025. Vol. 17, num. 31064. ISSN 1944-8244. [consulted: 4 of August of 2026]. Available at: https://hdl.handle.net/2445/229781