Synthesis and electroluminescence property of new hexaphenylbenzene derivatives including amine group for blue emitters

Table 2 EL performance of multilayered devices with the synthesized compounds at 10 mA/cm ²

Compound	Volt (V)	Current efficiency (cd/A)	Power efficiency (lm/W)	EQE (%)	CIE ( x, y)	EL maximum	HOMO (eV)	LUMO (eV)	Bandgap
5P-VA	9.51	1.91	0.76	1.89	0.154, 0196	466	-5.50	-2.52	2.99
5P-VTPA	7.31	1.30	0.63	3.59	0.150, 0.076	451	-5.65	-2.70	2.95
5P-DVTPA	7.87	2.10	0.93	3.34	0.148, 0.120	457	-5.60	-2.71	2.89

Device: ITO/ 2-TNATA 60 nm/ NPB 15 nm/ EML 35 nm/ TPBi 20 nm/ LiF 1 nm/ Al 200 nm.