Perovskite solar cell and preparation method thereof

[0053] In some embodiments, a method for preparing a perovskite solar cell is provided, such as Figure 4 shown, including:

[0054] S1 provides a transparent substrate layer;

[0055] S2 provides a transparent conductive film on the transparent substrate;

[0056] S3 provides an electron transport layer on the transparent conductive film;

[0057] S4 provides a perovskite absorbing layer onto the electron transport layer;

[0058] S5 provides an interface modification layer on the perovskite absorbing layer;

[0059] S6 provides a hole transport layer on the interface modification layer;

[0060] S7 provides an electrode onto the hole transport layer.

[0061] Specifically, the transparent conductive layer is an FTO transparent conductive film, or an ITO transparent conductive film.

[0062] Specifically, the specific process for providing the electron transport layer on the transparent conductive film includes a spin-coating coating process, a magnetron sputtering coating

[0095] S1 provides a glass substrate;

[0096] S2 Deposit FTO (fluorine-doped tin oxide) transparent conductive film on the glass substrate by magnetron sputtering coating method; the thickness of the transparent conductive film is 400nm; the square resistance is 10Ω / sq; then cut into 2cm*2cm size and cleaned.

[0097] S3 Spin-coat SnO on the substrate with deposited FTO 2 Nano-ions serve as the electron transport layer. The thickness of the electron transport layer is 50nm.

[0098] S4 Spin-coat the perovskite absorber layer on the substrate of the electron transport layer in two steps. Spin-coat lead iodide solution (1.3M, DMSO:DMF=9:1), put it on a hot stage and heat it at 70°C for 1 minute after spin-coating, take out the mixed solution of FAI / MABr after cooling (FAI:MABr:MACl= 10:1:1, isopropanol solution, 60mg / mL). Immediately after the spin-coating, heat on a hot stage at 150° C. for 15 minutes. The thickness of the perovskite layer is about 560nm.

[0099] S5

[0103] The glass substrate in S1 in embodiment 1 is changed into PET organic polymer substrate, S2, S3, S4, S6, S7 are all the same as S2, S3, S4, S6, S7 in embodiment 1 in this embodiment are the same;

[0104] S5 Spin coating on the perovskite absorbing layer to prepare the dibenzo-18-crown-6 interface modification layer. Use a pipette gun to draw 70 μL of dibenzo-18-crown-6 solution (isopropanol solution, 20 mg / mL), spin-coat at 3000 rpm for 30 s, and then perform annealing at 180° C. for 10 minutes.