Surfing the Color Map with Carbazole-Appended Cyclometalated N-Heterocyclic Carbene Pt Complexes and Their Application in Green Organic Light-Emitting Devices

J. Roy, M. Forzatti, A. Martín, I. Ara, E. Stanzani, S. Jenatsch, H. J. Bolink, S. Fuertes, D. Tordera, V. Sicilia, Adv. Optical Mater. 2025, 2500051. 

https://doi.org/10.1002/adom.202500051

This research details the synthesis and characterization of novel platinum(II) complexes featuring carbazole-appended cyclometalated N‑heterocyclic carbene ligands. Notably, the study shows that OLED devices incorporating ultrathin (0.1 nm) non‑doped emitting layers outperform conventional doped configurations—complex 1A-based devices achieved a peak luminance of approximately 39,000 cd/m² with a 12.8% EQE, and complex 3A devices reached an EQE of 13.4%.

This innovative approach simplifies device fabrication, reduces material consumption, and enables tunable color performance through precise control of the emitting layer thickness. The research further underscores the critical role of Fluxim’s advanced tools in the experimental process, with Paios (FLUXiM) used for transient electroluminescence decay measurements, Setfos for optical simulations, and Phelos (FLUXiM) for angular luminescence measurements.

These findings pave the way for more scalable, cost-effective OLED production and set a new benchmark for high-performance display technologies.