Perovskite solar cell capable of light incoming from double surfaces and fabrication method thereof

Abstract

The invention discloses a perovskite solar cell capable of light incoming from double surfaces. The perovskite solar cell comprises a transparent conductive substrate A, a photo anode layer, a perovskite absorption layer, a hole transmission layer, a counter electrode layer and a transparent conductive substrate B, wherein the counter electrode layer is a transparent polymer counter electrode layer. A fabrication method of the perovskite solar cell comprises the following steps of: (1) fabricating the photo anode layer on the transparent conductive substrate A; (2) fabricating the perovskite absorption layer on the photo anode layer; (3) fabricating the hole transmission layer on the perovsite absorption layer; and (4) fabricating the transparent polymer counter electrode layer on the transparent conductive substrate B through electrochemical polymerization by a cyclic voltammetry method, covering the fabricated transparent polymer counter electrode layer on the hole transmission layer, and drying to obtain the perovskite solar cell capable of light incoming from double surfaces. In the perovskite solar cell capable of light incoming from double surfaces, disclosed by the invention, polyaniline, polypyrrole or polythiophene is taken as a transparent counter electrode, and the transparent counter electrode is lower in cost than a nanocrystalline thin-film counter electrode or platinum counter electrode.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a perovskite solar cell capable of entering light from both sides and a preparation method thereof. Background technique [0002] In recent years, as an abundant and sustainable energy source, solar energy has attracted more and more researchers to develop various photovoltaic devices, making it the most strategic research field in this century. Since 2009, nanocrystalline thin-film solar cells have become a research hotspot in the field of photovoltaic devices due to their advantages of simple process, low cost, simple process and environmental friendliness. Among them, inorganic / organic hybrid perovskite solar cells are another new type of nanocrystalline thin-film solar cells with unique photoelectric properties in addition to dye-sensitized, quantum dot-sensitized solar cells, and organic solar cells. Cost and other aspects have shown great advantages. Since 2009, perovskite orga...

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Problems solved by technology

If the light transmittance of the opposite electrode is increased by reducing the thickness, the photoelectric conversion performance of the device will be reduced due to the weakening of the conductivity and photocatalysis of the gold film (Fang, X.; Ma, T.; Guan, G.; Akiyama , M.; Kida, T.; Abe, E.Effect of the thickness of the Pt film coated on a counter electrode on the performance of adye-sensitized solar cell. J. Electroanal. Chem. 2004, 570, 257); on the other hand, gold thin films are generally processed by high-energy and high-vacuum equipment such as magnetron sputtering or thermal spraying. preparation, which greatly increases the production cost of perovskite solar cells, and the use of gold counter electrodes makes it almost impossible for perovskite solar cells to be put into large-scale production and application

Therefore, it is necessary to further improve the light harvesting and energy generation effect of photovoltaic devices on sunlight, thereby improving the photoelectric conversion efficiency of devices, and at the same time solving the technical problems of complex preparation process and high cost of counter electrodes in perovskite solar cells. technical problem to be solved