Electronic devices made with electron transport and/or anti-quenching layers
View Patent ↗The present invention is directed to a photoactive device comprising an anode, a cathode, and a photoactive layer, which device further comprises an electron transport and/or anti-quenching layer which minimizes both electron transfer quenching and energy transfer quenching of the photoactive layer.
1. 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) E1−E3<1 eV,
(2) E1−E2>−1 eV, and
(3) E4−E5>−1 eV and; wherein the quinoxaline derivative is selected from Formulae VI(a), and VI(h):
2. The device of claim 1 , wherein the quinoxaline derivative has Formula VI(a).
3. The device of claim 1 , wherein the quinoxaline derivative has Formula VI(h).