US 11,690,282 B2
Organic solar cell
Doowhan Choi, Daejeon (KR); Jiyoung Lee, Daejeon (KR); Bogyu Lim, Daejeon (KR); Songrim Jang, Daejeon (KR); and Ji Hoon Kim, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/479,091
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jun. 18, 2018, PCT No. PCT/KR2018/006836
§ 371(c)(1), (2) Date Jul. 18, 2019,
PCT Pub. No. WO2018/236101, PCT Pub. Date Dec. 27, 2018.
Claims priority of application No. 10-2017-0079709 (KR), filed on Jun. 23, 2017.
Prior Publication US 2019/0378988 A1, Dec. 12, 2019
Int. Cl. H10K 85/10 (2023.01); C08G 61/12 (2006.01); H10K 30/30 (2023.01)
CPC H10K 85/113 (2023.02) [C08G 61/126 (2013.01); H10K 85/151 (2023.02); C08G 2261/124 (2013.01); C08G 2261/149 (2013.01); C08G 2261/1412 (2013.01); C08G 2261/1424 (2013.01); C08G 2261/18 (2013.01); C08G 2261/228 (2013.01); C08G 2261/312 (2013.01); C08G 2261/3223 (2013.01); C08G 2261/3243 (2013.01); C08G 2261/3246 (2013.01); C08G 2261/41 (2013.01); C08G 2261/91 (2013.01); H10K 30/30 (2023.02)] 16 Claims
OG exemplary drawing
 
1. An organic solar cell comprising:
a first electrode;
a second electrode on the first electrode; and
one or more organic material layers between the first electrode and the second electrode and including a photoactive layer,
wherein the photoactive layer comprises an electron donor and an electron acceptor,
the electron donor comprises a polymer comprising a first unit of Chemical Formula 1, a second unit of Chemical Formula 2, and a third unit of Chemical Formula 3:

OG Complex Work Unit Chemistry
wherein:
X1 to X5 are the same as or different from each other, and each is independently selected from the group consisting of CRR′, NR, O, SiRR′, PR, S, GeRR′, Se and Te;
Y1 to Y4 are the same as or different from each other, and each is independently selected from the group consisting of CR″, N, SiR″, P and GeR″;
R, R′, R″, Q1 to Q4, R1 to R4, R10 and R11 are the same as or different from each other, and each is independently hydrogen, deuterium, a halogen group, a hydroxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
R20 and R21 are the same as or different from each other, and each is independently a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group;
a, b, d and e are each an integer of 0 to 3;
when a, b, d or e is 2 or greater, structures in the two or more parentheses are the same as or different from each other; and
A1 to A4 are the same as or different from each other, and each is independently hydrogen, fluorine or chlorine, and at least one of A1 to A4 is fluorine or chlorine,
wherein the polymer comprises a unit of Chemical Formula 5:

OG Complex Work Unit Chemistry
wherein:
R27 to R30 are the same as or different from each other, and each is independently a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
R31 to R42 are the same as or different from each other, and each is independently hydrogen, or a substituted or unsubstituted alkyl group;
A1 and A4 have the same definitions as in Chemical Formula 1;
l is, as a mole fraction, a real number of 0<l<1;
m is, as a mole fraction, a real number of 0<m<1;
l+m=1; and
n is, as a unit repetition number, an integer of 1 to 10,000, and
wherein the electron acceptor includes a non-fullerene-based compound of Chemical Formula A-1:

OG Complex Work Unit Chemistry