Table 5. LEC device parameters obtained by applying a pulsed current density of 300 A m^–2, at a frequency of 1 kHz and duty cycles of 50%. t_on = time to reach maximum luminescence; t_1/2 = time to reach half of the maximum luminance.

Complex cation	Luminancemax/cd m–2	Efficacymax/cd A–1	t on/h	t 1/2/h
[Ir(Phppy)2(1)]+	1024	3.5	0.14	2800
[Ir(Phppy)2(2)]+	676	2.2	0.42	1204
[Ir(Phppy)2(3)]+	1090	3.5	0.03	437
[Ir(Phppy)2(4)]+	910	2.9	1.11	260
[Ir(Ph2ppy)2(1)]+	425	1.4	1.21	360
[Ir(Ph2ppy)2(2)]+	261	0.7	0.05	>2800
[Ir(Ph2ppy)2(3)]+	1048	2.9	0.07	282
[Ir(Ph2ppy)2(4)]+	748	1.8	0.01	147