Method of making a photovoltaic device on a substrate at high speed with perovskite solution

1. A method of making a perovskite absorber photovoltaic device comprising: providing a substrate; depositing a first carrier transport solution layer with a first carrier transport deposition device to form a first carrier transport layer on the substrate; depositing a Perovskite solution comprising solvent and perovskite precursor materials with a Perovskite solution deposition device on the first carrier transport layer; drying the deposited Perovskite solution to form a Perovskite absorber layer; and depositing a second carrier transport solution with a second carrier transport deposition device to form a second carrier transport layer on the Perovskite absorber layer, wherein the deposited Perovskite solution is dried at least partially with a fast drying device which causes a conversion reaction and the Perovskite solution to change in optical density by at least a factor of 2 in less than 0.5 seconds after the fast drying device first acts on the Perovskite solution.

2. The method of claim 1 wherein the substrate is flexible.

3. The method of claim 2 wherein the substrate is provided from a roll.

4. The method of claim 3 wherein the speed of the substrate is greater than 5 meters per minute as it moves from the roll to the first carrier transport deposition device.

5. The method of claim 1 wherein the substrate comprises a support layer and an electrode layer.

6. The method of claim 5 wherein the electrode layer is transparent.

7. The method of claim 1 , further comprising depositing an electrode layer on the substrate with an electrode deposition device.

8. The method of claim 7 wherein the electrode layer is transparent.

9. The method of claim 1 wherein the speed of the substrate is greater than 5 meters per minute as the substrate moves from the first carrier transport deposition device to the Perovskite solution deposition device and the speed of the substrate is greater than 5 meters per minute as the substrate moves from the Perovskite solution deposition device to the second carrier deposition device.

10. The method of claim 1 wherein the total solids concentration of the deposited Perovskite solution when entering the fast drying device is at least 75 percent of its saturation concentration.

11. The method of claim 1 wherein the substrate is provided in the form of a sheet.

12. The method of claim 1 further comprising depositing an electrode layer on the second carrier transport layer with an electrode deposition device.

13. The method of claim 1 wherein the substrate comprises a support comprising a material selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polysulfone, metal foil, or glass.

14. The method of claim 1 wherein the Perovskite absorber layer is heated to a temperature greater than 90 degrees Celsius for at least 30 seconds.

15. The method of claim 1 wherein the Perovskite solution solvent has a boiling point below 135 degrees Celsius.

16. The method of claim 1 wherein the perovskite solution deposition device comprises a component selected from the group consisting of slot die, gravure, spray, flexographic, dip, inkjet, rod, or blade.

17. The method of claim 1 further comprising removing portions of the first carrier transport layer, the Perovskite absorber layer, or the second carrier transport layer with a laser device.

18. A method of making perovskite absorber photovoltaic devices in a continuous inline process comprising: providing a flexible substrate from a roll; depositing a first carrier transport layer on the flexible substrate; depositing a Perovskite solution on the first carrier transport layer; drying the deposited Perovskite solution to form a Perovskite absorber layer; depositing a second carrier transport layer on the Perovskite absorber layer; and depositing an electrode layer, wherein the deposited Perovskite solution is dried at least partially with a drying device which increases the optical density of the deposited Perovskite solution by at least a factor of 2 in less than 0.5 seconds after the drying device first acts on the deposited Perovskite solution.

19. The method of claim 18 further comprising removing portions of the first carrier transport layer, the Perovskite absorber layer, the second carrier transport layer, or the electrode layer from the flexible substrate with a laser device.

20. The method of claim 18 further including depositing a transparent electrode layer on the flexible substrate.