Electronic device and compound

1. An electronic device comprising an n-dopant according to formula 1:

A-B   (1), wherein

and wherein

Ar 1 is a C6-C18 arylene,

Ar 2 is a C6-C18 arene skeleton, and R 4 is selected independently from electron donating groups,

B 1 and B 2 are independently selected from B or Ar 2 ,

B 3 is independently selected from the same group as B,

R 1 , R 2 , and R 3 are independently selected from alkyl, arylalkyl, cycloalkyl, aryl, or dialkylamino,

x is selected from 0, 1, 2 or 3, wherein when x>1 each Ar 1 may be different,

y is a non-zero integer up to the overall count of valence sites on the arene skeleton, and

z is a integer from zero up to the overall count of valence sites on the arene skeleton minus y.

2. The electronic device according to claim 1 , wherein any of R 1 , R 2 , and R 3 is independently selected from

straight or branched, saturated or unsaturated C1-C24 alkyl,

saturated or unsaturated C3-C24 cycloalkyl or alkyl comprising at least one cyclic structure,

C6-C24 aryl, wherein the overall count of carbon atoms includes also any possible substitution by a single substituent or more substituents selected from saturated or unsaturated, straight or branched alkyl or cycloalkyl, aryl, arylalkyl or alkylaryl groups and within this substitution up to three alkyl groups can be attached to the arene core by an ether linkage or up to six alkyl groups can be attached through a disubstituted nitrogen atom,

C7-C25 arylalkyl, wherein the overall C atom count includes also a possible substitution on the arene ring or rings and within this substitution up to three alkyl groups can be attached to the arene ring or rings through an ether linkage or up to six alkyl groups through a disubstituted nitrogen atom,

C2-C24 dialkylamino, wherein the alkyl groups may be the same or different, straight or branched, may include also alicyclic or aromatic structures or be unsaturated with a provision that the carbon atom bearing a double or triple bond is not adjacent to nitrogen, the two alkyls in the dialkylamino group may be so linked that they form a cycle comprising the nitrogen atom and up to four ether linkages can be included between methylene groups of the dialkylamino group, and with a provision that in any case the nitrogen and/or oxygen atoms are separated by at least two carbon atoms,

or two groups selected from R 1 -R 3 may be linked so that they form a cyclic structure including a phosphorus atom.

3. The electronic device according to claim 2 , wherein any of R 1 , R 2 , and R 3 is independently selected from C1-C4 alkyl, C3-C10 cycloalkyl, C7-C10 arylalkyl, C6-C14 aryl, or C2-C12 dialkylamino.

4. The electronic device according to claim 1 , wherein

Ar 2 is a benzene or naphthalene skeleton,

Ar 1 is phenylene, or x is 0,

y is selected from 1, 2, 3 or 4 if Ar 2 is benzene, or from 1, 2, 3, 4, 5, or 6 if Ar 2 is naphthalene, and

z is selected from 0 or 1 if Ar 2 is benzene, or from 0, 1, or 2 if Ar 2 is naphthalene.

5. The electronic device according to claim 4 , wherein

Ar 2 is a benzene skeleton, and

Ar 1 is 1,4-phenylene or x is 0.

6. The electronic device according to claim 1 , wherein each of R 1 -R 3 is independently selected from methyl, isopropyl, tert-butyl, cyclohexyl, phenyl, tolyl, xylyl, mesityl, naphthyl, anthryl, phenanthryl, 1,1′-biphenyl-yl, 1,3-diisopropylphenyl, benzyl, 4-methoxybenzyl, or dimethylamino.

7. The electronic device according to claim 1 , wherein the device has a layered structure comprising several layers.

8. The electronic device according to claim 7 , wherein a layer comprising the n-dopant of Formula 1 is an electron transport layer.

9. The electronic device according to claim 7 , wherein a layer comprising the n-dopant of Formula 1 has a thickness of less than 5 nm.

10. The electronic device according to claim 7 , wherein the layer comprising the n-dopant of Formula 1 is in direct contact to an electrode.

11. The electronic device according to claim 7 , wherein a layer comprising the n-dopant of Formula 1 is in direct contact to an electron transport layer.

12. The electronic device according to claim 7 , wherein a layer comprising the n-dopant of Formula 1 is part of a connecting unit, the connecting unit comprising a pn-junction connecting a first light absorbing unit to a second light absorbing unit in a tandem device or a multiple stacked device.

13. The electronic device according to claim 1 , wherein the device is a solar cell.

14. The electronic device according to claim 1 , wherein each R 4 is independently selected from alkyl, alkoxy, aryl, or aryloxy having an overall count of carbon atoms in the range of C1-C22.

15. The electronic device according to claim 14 , wherein each R 4 is independently selected from methyl, methoxy, ethyl, ethoxy, propyl, propoxy, isopropyl, isopropoxy, butyl, butoxy, tert-butyl, tert.-butoxy, cyclohexyl, benzyl, or benzyloxy.

16. The electronic device according to claim 2 , wherein up to four ether linkages can be included within any of the C3-C24 alkyl or cycloalkyl structures with a provision that oxygen atoms are in any case separated by at least two carbon atoms.

17. The electronic device according to claim 10 , wherein the electrode is a cathode.

18. The electronic device according to claim 1 , wherein Ar 1 is a polycyclic C8-C18 arylene that is substituted by one or more C1-C10-alkyl or C3-C10-cycloalkyl groups.