Dye-sensitization solar battery with up-conversion material signal enhancement layer

Abstract

The invention discloses a dye-sensitization solar battery with an up-conversion material signal enhancement layer, which is composed of a photo-anode substrate, a semiconductor porous thin film, dye, an electrolyte, a counter electrode and the up-conversion material signal enhancement layer; the signal enhancement layer made of the up-conversion material can absorb the infrared part of the sunlight and convert the same into visible lights for the excitation of the dye, thus greatly improving the utilization ratio of the solar energy to thereby efficiently improve the photoelectric conversion efficiency of the battery.

Description

(1) Technical field: [0001] The invention belongs to the field of solar energy and relates to a dye-sensitized solar cell. (two) background technology: [0002] With the increasing severity of the global energy crisis, people are eager to find a sustainable clean energy source. Solar energy, as an inexhaustible natural energy source, has increasingly attracted the attention of countries all over the world. Compared with traditional silicon solar cells, dye-sensitized solar cells have low cost and simple fabrication, and have attracted widespread attention all over the world. They are considered to be the most promising next-generation solar cells. However, the actual photoelectric conversion efficiency of dye-sensitized solar cells is only 11%, which is far from the requirements of industrialization. [0003] Although many groups at home and abroad have done a lot of work on improving the photoelectric conversion efficiency of dye-sensitized solar cells over the years, the...

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Problems solved by technology

However, the actual photoelectric conversion efficiency of dye-sensitized solar cells is only 11%, which is far from the requirements of industrialization.

[0003] Although many groups at home and abroad have done a lot of work on improving the photoelectric conversion efficiency of dye-sensitized solar cells over the years, the effect is not significant.

One of the important reasons is that the solar energy utilization efficiency of the overall battery system is not high due to the fact that the absorption spectrum of the dye is difficult to match with the emission spectrum of the sun.

For example, the dye N719 ruthenium dye used in dye-sensitized solar cells is generally recognized by people, and its absorption spectrum is mainly concentrated in the visible light region of 400-600nm, while sunlight contains 3% of ultraviolet rays in addition to 44% of visible light. and 53% infrared, obviously most of the energy in sunlight is not being used efficiently

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