Patent ID: 8071975

Claim:
A photoactive electronic device comprising: (a) an anode; (b) a cathode, said cathode having a work function energy level E 3 ; (c) a photoactive layer positioned between said anode and said cathode, said photoactive layer comprising a cyclometalated complex of a transition metal, said cyclometalated complex having a LUMO energy level E 2 and a HOMO energy level E 4 ; and (d) an electron transport and/or anti-quenching layer, at least one of the electron transport or anti-quenching layer comprising a quinoxaline derivative, positioned between said cathode and said photoactive layer, said electron transport and/or anti-quenching layer having a LUMO energy level E 1 and a HOMO energy level E 5 , with the proviso that: (1) E1âˆ’E3<1 eV, (2) E1âˆ’E2>âˆ’1 eV, and (3) E4âˆ’E5>âˆ’1 eV and; wherein the quinoxaline derivative is selected from Formulae VI(a), and VI(h):