Table 2.

EL performance parameters of NIR OLEDs based on the studied radicals

Dopant (3 wt%)	Von a [V]	R/J at 12 V b [mW sr-1m−2/mA cm-2]	EQEmax c [%]	EQE J=1/10/100 c [%]	λEL d [nm]	R0 e [mW sr−1m−2]	LT85f [hour]
TTM-TPA	2.7	60659/213	9.01 g	8.89/8.22/6.54	798	40	4.0
perD-TTM-TPA	2.7	84429/271	10.81	10.65/9.50/7.75	800	48	14.0
PyBTM-TPA	2.8	34662/469	2.66	2.64/2.49/2.04	866	10	8.5
perD-PyBTM-TPA	3.0	57913/561	3.56	3.42/3.50/3.00	865	11	76.8

^a The voltage at which the radiance reaches 1 mW sr^–1 m^–2.

^bBoth the radiance and current density are measured at 12 V.

^cThis value corresponds to the EQE_max and EQE determined at 1, 10, and 100 mA cm^–2.

^dEL spectra measured at 5 V.

^eThe initial radiance values at the applied constant current density of 0.1 mA cm⁻².

^fThe duration it takes for the EL intensity to decrease to 85% of its initial value.

^gAn EQE_max of 9.6% was reported in ref. ³⁷.

TTM-TPA, perD-TTM-TPA, PyBTM-TPA and perD-PyBTM-TPA.