Blade coating structure for modified efficient perovskite solar cell, and preparation method

Abstract

The invention belongs to the technical field of material science and engineering energy device optimization, and discloses a blade coating structure for a modified efficient perovskite solar cell, anda preparation method. NiOx is used for replacing PDEOT:PSS (Poly(3,4-ethylene dioxythiophene): poly(styrenesulfonate)) to carry out the interface optimization of the solar cell device, and is subjected to spin coating to conductive glass; dimethyl sulfoxide and dimethyl formamide are added into the precursor solution of perovskite, the ratio of DMSO (dimethyl sulfoxide) to DMF (Dimethyl Formamide) is regulated and controlled, and perovskite solution solvent is optimized; the solar cell device is coated with the perovskite solution by a blade coating method at an environment temperature; and afullerene derivative BCPM ([6,6]-phenyl-C61-butyric acid methyl ester) BCP (block copolymer) is coated n sequence, a sliver electrode is plated to prepare the PSC (Perovskite Solar Cell). Through themodification of solvent in the perovskite solvent and the change of a hole transport layer interface material, the efficiency of the perovskite solar cell is theoretically improved. Meanwhile, the preparation method adopts scraper coating, so that preparation speed and operation convenience are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of material science and engineering energy device optimization, and in particular relates to a scraping coating structure and a preparation method of a modified high-efficiency perovskite solar cell. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Clean the conductive substrate first, and then operate in a nitrogen atmosphere glove box (oxygen content ≤ 5.0ppm, water content ≤ 0.1ppm), spin the hole transport material such as the aqueous solution of polymer PDEOT:PSS at a certain speed Apply to the conductive substrate, use DMF or other solvents to prepare the perovskite solution, and then mix the perovskite solution, electron transport materials such as fullerene derivatives PCBM, interface modification materials such as titanium dioxide (TiO 2 ) is spin-coated at a certain speed onto the above-mentioned hole-transporting thin film ...

AI Technical Summary

Problems solved by technology

[0008] (1) Existing fabrication techniques for high-efficiency perovskite solar cells (PSCs) are limited to spin-coating processes in the glove box

[0009] (2) In the doctor blade coating technology of the prior art, the commonly used PEDOT:PSS solution has poor wettability relative to the NiOx solution, which is not conducive to the rapid spreading of the perovskite precursor solution in the PEDOT:PSS layer, which is not conducive to calcium High-quality film formation from titanite solution, in addition, PEDOT:PSS is not conducive to long-term stability of the device under ambient conditions due to its high acidity and hygroscopicity

[0010] (3) In the doctor blade coating technology of prior art, what perovskite solution solvent used is DMF solution, because its volatility is higher, cause crystal grain growth inhomogeneous under the joint action of solvent volatility and blade coating stress, It is not conducive to the uniform film formation of perovskite

[0011] (4) The prior art process does not use auxiliary heating of the substrate during operation, and cannot control the solvent volatilization rate and phase transition temperature, which is not conducive to the film formation consistency of the perovskite film

[0012] (5) High cost and harsh environment make it difficult to commercialize existing technologies

[0013] (6) Most of the spin-coating methods used in the preparation of existing technologies cannot be applied to the preparation of large-area perovskite solar cells, and the research has limited significance for industrialization

[0015] (1) Perovskite materials have poor stability and are easily oxidized and decomposed in the air. How to ensure the uniformity of film formation and rapid film formation under high humidity and high oxygen conditions is the key

[0016] (2) Perovskite materials are toxic to a certain extent, and anti-virus measures are required for operators

[0017] (3) It is difficult to precisely control the appropriate ratio of DMSO and DMF. A small amount of DMSO can slow down the film-forming speed and promote the film-forming uniformity of the perovskite solution, but too much DMSO will inhibit the crystallization process of the perovskite solution, which is not conducive to The uniformity of film formation, so the appropriate mixing ratio of DMSO and DMF becomes the key technology for preparing high-quality perovskite films

[0019] (5) Full doctor blade coating is extremely challenging for the uniformity of film formation of large-area solar cells of 100 square centimeters, and requires high operating proficiency

Images