Eliminating nonradiative decay in Cu(I) emitters: >99% quantum efficiency and microsecond lifetime
University of Southern California · University of California San Diego
Abstract
Luminescent complexes of heavy metals such as iridium, platinum, and ruthenium play an important role in photocatalysis and energy conversion applications as well as organic light-emitting diodes (OLEDs). Achieving comparable performance from more-earth-abundant copper requires overcoming the weak spin-orbit coupling of the light metal as well as limiting the high reorganization energies typical in copper(I) [Cu(I)] complexes. Here we report that two-coordinate Cu(I) complexes with redox active ligands in coplanar conformation manifest suppressed nonradiative decay, reduced structural reorganization, and sufficient orbital overlap for efficient charge transfer. We achieve photoluminescence efficiencies >99%…
Citation impact
- FWCI
- 41.89
- Percentile
- 100%
- References
- 67
Authors
11Topics & keywords
- Microsecond
- Photoexcitation
- Copper
- Luminescence
- Excited state
- Ligand (biochemistry)
- Amide
- Carbene