Granted Patent B2

US 12,648,295 · App. 17/841,856 · Granted Jun 2, 2026

Inventors: Hideko Yoshizumi (Atsugi, JP); Ryo Narukawa (Hadano, JP); Satoko Numata (Atsugi, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K50/156H10K50/166H10K85/654H10K85/6572H10K59/871H10K59/876H10K2101/00H10K2102/351

Abstract

Claims (38)

1 . A photoelectric conversion device comprising:

a first electrode;

a second electrode; and

an electron-donating material, an electron-accepting material, and

an organic compound between the first electrode and the second electrode,

wherein the organic compound comprises four or more rotatable bonds,

wherein the organic compound comprises a principal moment of inertia,

wherein the principal moment of inertia comprises a first normalized principal moment of inertia NPR1 and a second normalized principal moment of inertia NPR2,

wherein the first normalized principal moment of inertia NPR1 and the second normalized principal moment of inertia NPR2 are in a region surrounded by straight lines represented by formulae shown below:

NPR2≤NPR1+0.95  (1)

NPR2≥NPR1+0.65  (2)

NPR2≤−NPR1+1.05  (3)

NPR2≥−NPR1+1.00  (4)

wherein the first normalized principal moment of inertia NPR1 and the second normalized principal moment of inertia NPR2 are values obtained by dividing elements other than a largest element of the principal moment of inertia by the largest element, and

wherein the second normalized principal moment of inertia NPR2 is greater than or equal to the first normalized principal moment of inertia NPR1.

2 . The photoelectric conversion device according to claim 1 ,

wherein the organic compound comprises a polar surface area of 30 Å 2 or larger.

3 . A photoelectric conversion device comprising:

a first electrode;

a second electrode; and

a first layer, a second layer, and a third layer between the first electrode and the second electrode,

wherein the first layer is between the second layer and the third layer,

wherein the first layer comprises an electron-donating material and an electron-accepting material,

wherein the third layer is between the second electrode and the first layer, and

wherein the third layer comprises an organic compound,

wherein the organic compound comprises four or more rotatable bonds,

wherein the organic compound comprises a principal moment of inertia,

wherein the organic compound comprises a polar surface area of 30 Å 2 or larger,

wherein the principal moment of inertia comprises a first normalized principal moment of inertia NPR1 and a second normalized principal moment of inertia NPR2,

wherein the first normalized principal moment of inertia NPR1 and the second normalized principal moment of inertia NPR2 are in a region surrounded by straight lines represented by formulae shown below:

NPR2≤NPR1+0.95  (1)

NPR2≥NPR1+0.65  (2)

NPR2≤−NPR1+1.05  (3)

NPR2≥−NPR1+1.00  (4)

wherein the first normalized principal moment of inertia NPR1 and the second normalized principal moment of inertia NPR2 are values obtained by dividing elements other than a largest element of the principal moment of inertia by the largest element, and

wherein the second normalized principal moment of inertia NPR2 is greater than or equal to the first normalized principal moment of inertia NPR1.

4 . The photoelectric conversion device according to claim 3 ,

wherein the organic compound has a molecular weight of greater than or equal to 550 and less than or equal to 850.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (32)