Heteroleptic Ir(III)-based near-infrared organic light-emitting diodes with high radiance capacity
Park, Y., Lee, G.S., Lee, W. et al.
Sci Rep 13, 1369 (2023).
https://doi.org/10.1038/s41598-023-27487-6
Researchers have developed new Ir(III)-based heteroleptic NIR materials for near-infrared organic light-emitting diodes (NIR OLEDs) with heavy metals, which have a highly oriented horizontal dipole ratio and short radiative lifetime. These emitters offer an extremely low turn-on voltage and high radiance capacity, making them suitable for various applications such as healthcare services, veil authentication, and night vision displays. This study demonstrates exceptional device performance among similar Ir(III)-based NIR OLEDs, which makes it a promising material for commercial applications.
Measurement of the angle dependent p-polarized photoluminescent spectrum (ADPL)
The emission layer was deposited on a bare 50 nm-thick glass substrate. Then, glass encapsulation was done in a nitrogen (N2)-filled glove box to avoid degradation from the air. A full angle dependent p-polarized PL spectrum was obtained with the goniometer based motorized intensity measurement system Phelos, Fluxim.