Flexible dye-sensitized nanocrystalline organic photovoltaic cell photoanode and preparation method thereof

Abstract

The embodiment of the invention discloses a preparation method of a light anode of a flexible dye sensitized nano crystalline organic photovoltaic cell. The method comprises the following steps: dipping or spraying a uniform nano crystalline slurry on a flexible antioxidant metal wire mesh selected as a substrate, thus forming a nano crystalline thin film on the surface of the wire mesh; carryingout high-temperature heat treatment on the substrate attached with the nano crystalline thin film, thus preparing the metal wire mesh with the porous nano crystalline thin film; and then soaking the metal wire mesh with the porous nano crystalline thin film in a dye solution, thus realizing the dye sensitive effect on the nano crystalline thin film. The invention also discloses a light anode and a photovoltaic cell which are obtained according to the preparation method. According to the scheme provided by the invention, under the condition that the electric conductivity and transmission of light of the light anode can not be lowered, the DSSC (dye sensitized solar cell) has a flexible characteristic, and the nano crystalline thin film is subjected to high-temperature sintering treatment, thus the porous nano crystalline thin film is obtained, and the capability of dye absorption is improved, so that the assembled cell has the performance of higher photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of organic photovoltaic cells, in particular, the invention relates to a photoanode of a flexible dye-sensitized nanocrystalline organic photovoltaic cell and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible, inexhaustible, safe and reliable non-polluting energy that is not restricted by geographical environment. At present, solar cells mainly include silicon-based solar cells, compound thin-film solar cells, dye-sensitized nanocrystalline solar cells, and organic / polymer thin-film solar cells. [0003] Although inorganic silicon semiconductor solar cells have been commercialized for a long time, their further development is limited by problems such as high cost, shortage of silicon raw materials, non-degradable toxicity of inorganic materials, and difficulty in flexible processing. 1991 Swiss scientist The leading research group made a breakthrough in the field...

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Problems solved by technology

Obviously, this makes DSSC lose the flexible characteristics of organic photovoltaic cells

Except that the cost is lower than that of inorganic silicon semiconductors, it does not show much advantage, and the photoelectric conversion efficiency of DSSC is still not comparable to that of monocrystalline (or polycrystalline) silicon solar cells, so the advantages of the above methods are limited

[0006] In order to prepare flexible DSSCs, expand the scope of use of DSSCs and improve product competitiveness, the main method currently used at home and abroad is to replace the original conductive glass with conductive polymer films. Although this solves the problem of flexible solar cells, on the one hand Since the polymer film is not resistant to high temperature, it is difficult to prepare nanocrystals (such as TiO 2 etc.) The thin film is subjected to high-temperature heat treatment (sintering), which can only be obtained by screen printing and other methods at room temperature, and the required porous structure cannot be obtained, thereby greatly reducing the ability to adsorb dyes and seriously affecting its photoelectric conversion efficiency.

On the other hand, the better the conductivity, the poorer the transparency of the polymer film. In this way, in order to improve the conductivity, its light transmission performance has to be sacrificed, so that the efficiency of the battery absorbing sunlight energy is significantly reduced, which also affects the photoelectricity of the battery. conversion efficiency

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