A perovskite solar cell using a perovskite composite material as a hole transport layer and its preparation method

Abstract

The perovskite solar cell of the present invention is composed of a transparent conductive glass, a dense layer, a perovskite light absorbing layer, a hole transport layer, and a metal back electrode, and is characterized in that the chemical composition of the hole transport layer is PxA1-xMX3, wherein A represents Methylamine, formamidine, guanidine or their mixtures that can generate monovalent organic cations; M represents Pb, Ce, Fe, Co, Cu ions or their mixtures, which are by-products formed during the in-situ preparation of polypyrrole; X represents F, Cl, Br, I; P stands for polypyrrole, which is produced by oxidation of pyrrole as a high-valent metal salt in a polar organic solvent, x=0.3‑0.5. The chemical composition of the perovskite light-absorbing layer in the perovskite solar cell of the present invention is APbX3, and the thickness is 100-500 nm. The hole transport layer of the perovskite solar cell of the present invention is coated on the perovskite light absorbing layer with a thickness of 50-150nm, which can promote the separation and transmission of holes and improve the photoelectric conversion performance of the perovskite solar cell.

Description

technical field

[0001] The invention relates to a perovskite solar cell using a perovskite type material and a polypyrrole conductive polymer material as a hole transport layer and a preparation method thereof, belonging to the field of new energy and new materials. technical background

[0002] Perovskite solar cells are usually composed of five parts: transparent conductive glass, dense layer, perovskite light absorbing layer, hole transport layer, and metal back electrode. The thickness of the hole transport layer is generally 0-150nm. The photoelectric conversion efficiency of perovskite solar cells without a hole transport layer is usually relatively low. The functions of the hole transport layer include: (1) collecting light from the perovskite absorbing layer The injected holes separate the electron-hole pairs of the perovskite light-absorbing layer; (2) The insertion of the hole transport layer between the perovskite light-absorbing layer and the metal back electrode...

Examples

Embodiment 1

[0024] Add 220g (3.0mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 88.6g (0.10mol) of an acetic acid solution of lead tetraacetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 8 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce lead tetraacetate to It is low-valence lead acetate. Then add 77.4 g (0.3 mol) of hydriodic acid solution with a concentration of 50% by mass and continue stirring for 1 hour to reduce excess lead tetraacetate to form a hydriodic acid-doped polypyrrole and lead iodide solution. Further add 10.3 g (0.1 mol) of a methanol solution of methylamine with a mass percent concentration of 30%, and react at 10-30°C for 8 hours to coordinate lead iodide with methylamine and polypyrrole in the presence of hydroiodic acid reaction to form a hole transport layer coating s...

Embodiment 2

[0028] Add 220g (3mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 28.7g (0.15mol) of an acetic acid solution of iron acetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 12 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce iron acetate to low-priced state of iron acetate. Add 103.2 g (0.4 mol) of hydriodic acid solution with a mass percent concentration of 50% and continue stirring for 1 hour to reduce excess iron acetate to form a hydriodic acid-doped polypyrrole and ferrous iodide solution. Further add 15.5 g (0.15 mol) of methanol solution of methylamine with a concentration of 30% by mass, and react at 10-30°C for 12 hours to make ferrous iodide, methylamine and polypyrrole complex in the presence of hydroiodic acid bit reaction to form a hole transport layer coating solution. ...

technical field

[0001] The invention relates to a perovskite solar cell using a perovskite type material and a polypyrrole conductive polymer material as a hole transport layer and a preparation method thereof, belonging to the field of new energy and new materials. technical background

[0002] Perovskite solar cells are usually composed of five parts: transparent conductive glass, dense layer, perovskite light absorbing layer, hole transport layer, and metal back electrode. The thickness of the hole transport layer is generally 0-150nm. The photoelectric conversion efficiency of perovskite solar cells without a hole transport layer is usually relatively low. The functions of the hole transport layer include: (1) collecting light from the perovskite absorbing layer The injected holes separate the electron-hole pairs of the perovskite light-absorbing layer; (2) The insertion of the hole transport layer between the perovskite light-absorbing layer and the metal back electrode...

Examples

Embodiment 1

[0024] Add 220g (3.0mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 88.6g (0.10mol) of an acetic acid solution of lead tetraacetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 8 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce lead tetraacetate to It is low-valence lead acetate. Then add 77.4 g (0.3 mol) of hydriodic acid solution with a concentration of 50% by mass and continue stirring for 1 hour to reduce excess lead tetraacetate to form a hydriodic acid-doped polypyrrole and lead iodide solution. Further add 10.3 g (0.1 mol) of a methanol solution of methylamine with a mass percent concentration of 30%, and react at 10-30°C for 8 hours to coordinate lead iodide with methylamine and polypyrrole in the presence of hydroiodic acid reaction to form a hole transport layer coating s...

Embodiment 2

[0028] Add 220g (3mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 28.7g (0.15mol) of an acetic acid solution of iron acetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 12 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce iron acetate to low-priced state of iron acetate. Add 103.2 g (0.4 mol) of hydriodic acid solution with a mass percent concentration of 50% and continue stirring for 1 hour to reduce excess iron acetate to form a hydriodic acid-doped polypyrrole and ferrous iodide solution. Further add 15.5 g (0.15 mol) of methanol solution of methylamine with a concentration of 30% by mass, and react at 10-30°C for 12 hours to make ferrous iodide, methylamine and polypyrrole complex in the presence of hydroiodic acid bit reaction to form a hole transport layer coating solution. ...