US 12,250,869 B2
Mechanically robust and self-healable perovskite solar cells
Letian Dou, West Lafayette, IN (US); and Blake Peter Finkenauer, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Dec. 1, 2023, as Appl. No. 18/527,201.
Application 18/527,201 is a division of application No. 17/720,348, filed on Apr. 14, 2022, granted, now 11,877,504.
Claims priority of provisional application 63/186,077, filed on May 8, 2021.
Claims priority of provisional application 63/174,635, filed on Apr. 14, 2021.
Prior Publication US 2024/0114764 A1, Apr. 4, 2024
Int. Cl. H10K 85/10 (2023.01); H10K 85/40 (2023.01); H10K 30/10 (2023.01); H10K 102/00 (2023.01); H10K 102/10 (2023.01)
CPC H10K 85/10 (2023.02) [H10K 85/40 (2023.02); H10K 30/10 (2023.02); H10K 2102/101 (2023.02); H10K 2102/351 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A method of making solar cells, which method comprises:
(a) spin-coating either of a first hole transporting layer or a first electron transporting layer onto a substrate coated with a transparent conducting layer;
(b) treating the first hole transporting layer or the first electron transporting layer with ultraviolet light, ozone, and dimethylformamide (DMF);
(c) preparing a perovskite-polymer composite film by incorporating a self-healing polymer into a perovskite, wherein the self-healing polymer has a formula I:

OG Complex Work Unit Chemistry
alone or in a further combination with a (—O—Si(CH3)2—O—) fragment, wherein R1 and R2 are each independently a C1-C6 alkyl and R3 and R4 are each independently —NH2 or

OG Complex Work Unit Chemistry
wherein —NH2 and/or

OG Complex Work Unit Chemistry
can be in protonated form, and n is 10-300;
(d) spin-coating the perovskite-polymer composite film onto the first hole transporting layer or the first electron transporting layer;
(e) annealing the perovskite-polymer composite film;
(f) when a first hole transporting layer is spin-coated in (a), spin-coating a second electron transporting layer onto the perovskite-polymer composite film, or when a first electron transporting layer is spin-coated in (a), spin-coating a second hole transporting layer onto the perovskite-polymer composite film;
(g) spin-coating either of a hole blocking layer or an electron blocking layer onto the second electron transporting layer or the second hole transporting layer; and
(h) annealing a counter electrode layer onto the hole blocking layer or the electron blocking layer;
whereupon a solar cell is made.