Organic photoelectric conversion element and organic solar cell using the same
View Patent ↗To provide an organic photoelectric conversion element whereby conversion efficiency is increased by morphology improvement in a power generation layer, and whereby short circuit current (Jsc) attenuation when irradiating light is simultaneously suppressed, and an organic solar cell using the same. An organic photoelectric conversion element having: a transparent first electrode; a power generation layer having a p-type organic semiconductor material and an n-type organic semiconductor material; and a second electrode, on a transparent substrate, in which the power generation layer is a bulk heterojunction power generation layer including the p-type organic semiconductor material and the n-type organic semiconductor material, and additionally includes a compound represented by either the following general formula (I) or general formula (II).
1. An organic photoelectric conversion element comprising:
a transparent first electrode;
a power generation layer having a p-type organic semiconductor material and an n-type organic semiconductor material; and
a second electrode disposed on a transparent substrate,
wherein the power generation layer is a bulk heterojunction power generation layer including the p-type organic semiconductor material and the n-type organic semiconductor material, and additionally comprising a compound represented by the following formula (I):
wherein R 1 represents a substituted or unsubstituted aryl group, Z 1 and Z 2 each represents a substituted or unsubstituted alkylene group having 1 to 3 carbon atoms, provided that a sum of the carbon atoms in the alkylene groups represented by Z 1 and Z 2 is 3 to 6; A represents an oxygen atom, N-Z 3 , or S(O) n5 ; Z 3 represents an alkyl group or an aryl group; and n5 represents an integer of from 0 to 2.
2. The organic photoelectric conversion element according to claim 1 , wherein the compound represented by formula (I) is contained in an amount of 0.1 to 15 parts by mass with respect to 100 parts by mass of a sum of the p-type semiconductor and n-type semiconductor.
3. The organic photoelectric conversion element according to claim 1 , wherein the compound represented by formula (I) has a solubility parameter value of 19 to 23.
4. An organic solar cell comprising the organic photoelectric conversion element according to claim 1 .
5. An organic photoelectric conversion element comprising:
a transparent first electrode;
a power generation layer having a p-type organic semiconductor material and an n-type organic semiconductor material; and
a second electrode disposed on a transparent substrate,
wherein the power generation layer is a bulk heterojunction power generation layer including the p-type organic semiconductor material and the n-type organic semiconductor material, and additionally comprising a compound represented by one of the following formulas (I-A) to (I-E):
wherein R 2 and R 3 represent a halogen atom, a substituted or unsubstituted alkyl group (—R a ), a hydroxyalkyl group (—R a (OH)), an alkoxy group (—OR a ), an aryloxy group, an amino group (—NH 2 ), an amino group (—NHR a ), an amino group (—N(R a ) 2 ), a thioether group (—SRa), an ester group, —COR a , —COOR a , —NHCOR a , —NHCOOR a , —NHSO 2 R a , or an alkylcarbonyloxy group (—OCOR a ), in which R a represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, and m5 and l5 each represent an integer of from 0 to 4.
6. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is contained in an amount of 0.1 to 15 parts by mass with respect to 100 parts by mass of a sum of the p-type semiconductor and n-type semiconductor.
7. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) has a solubility parameter value of 19 to 23.
8. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is the compound of formula (I-A).
9. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is the compound of formula (I-B).
10. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is the compound of formula (I-C).
11. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is the compound of formula (I-D).
12. The organic photoelectric conversion element according to claim 5 , wherein the compound represented by one of the formulas (I-A) to (I-E) is the compound of formula (I-E).
13. An organic solar cell comprising the organic conversion element according to claim 5 .