Heteronuclear Complexes Containing Pt(II) and Ag(I) Centers: Application to Efficient Light-Emitting Electrochemical Cells

Lázaro, Ariadna; Crespo, Margarita; Pander, Piotr; Dias, Fernando B; Rodríguez, Laura

Abstract

We report the synthesis of novel ionic heteronuclear Pt(II)-Ag(I) complexes derived from Pt(NCN)-C≡CR precursors (R = aryl), where Ag ions coordinate to the acetylene groups. The photophysical investigation reveals a complex interplay of emissions: MLCT and LC states from the Pt(NCN) units, LC emissions from the R aryl groups, and MMLCT 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 MMLCT 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 . These results represent one of the highest-performing LEECs incorporating Pt(II)-based phosphorescent complexes, underscoring their potential in light-emitting applications.

Citation

Lázaro, A., Crespo, M., Pander, P., Dias, F. B., & Rodríguez, L. (2025). Heteronuclear Complexes Containing Pt(II) and Ag(I) Centers: Application to Efficient Light-Emitting Electrochemical Cells. ACS Applied Materials and Interfaces, 17(21), 31064-31077. https://doi.org/10.1021/acsami.4c22938

• Journal Article Type: Article
• Acceptance Date: May 9, 2025
• Online Publication Date: May 19, 2025
• Publication Date: 2025
• Deposit Date: Jun 23, 2025
• Publicly Available Date: Jun 23, 2025
• Journal: ACS applied materials & interfaces
• Print ISSN: 1944-8244
• Electronic ISSN: 1944-8252
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 17
• Issue: 21
• Pages: 31064-31077
• DOI: https://doi.org/10.1021/acsami.4c22938
• Keywords: LEECs, heteronuclear complex, photophysics, platinum complex, cyclometalation
• Public URL: https://durham-repository.worktribe.com/output/4091395