Method for preparing titanium dioxide and perovskite plane heterojunction solar cell at low temperature

Abstract

The invention relates to a preparation of an organic and inorganic hybrid perovskite plane heterojunction photovoltaic device on a flexible substrate, in particular to achievement of the preparation of a flexible perovskite photovoltaic device in an all-low-temperature condition employing a titanium dioxide compact layer prepared by an anodic oxidation method as an electron transport layer. The low-temperature flexible photovoltaic device based on a flexible PET / ITO transparent conductive base, an anodic oxidation titanium dioxide compact layer, an organic and inorganic hybrid perovskite absorption layer, a hole transport layer and a metal electrode layer is prepared by the following steps: carrying out sputtering on the PET / ITO conductive base to obtain a metal titanium film which is 30-100nm in thickness; carrying out an oxidation in a certain solvent to obtain the titanium dioxide compact layer; preparing the organic and inorganic hole transport layer through spinning, evaporating or printing the perovskite absorption layer; and finally evaporating a metal electrode to finish preparation of the overall device. The photoelectric conversion efficiency of the prepared flexible photovoltaic device exceeds 6%. The method has the characteristics that the titanium dioxide compact layer prepared by anodic oxidation can be obtained in a room-temperature condition; and a development approach is provided for low-cost and large-area industrial development of the perovskite solar cell.

Description

technical field [0001] The invention relates to the field of organic-inorganic hybrid perovskite planar heterojunction solar cells, in particular to a flexible perovskite planar heterojunction solar cell using a low-temperature titanium dioxide dense layer prepared by an anodic oxidation method as an electron transport layer and a preparation method thereof . Background technique [0002] With the continuous consumption of energy in the world, solar cell power generation has become an effective way to replace traditional non-renewable energy. Organic-inorganic hybrid perovskite solar cells have received widespread attention in the photovoltaic field since 2012. In just a few years, their photoelectric conversion efficiency has soared from the initial 3.8% to the current certification of more than 20%. efficiency. The excellent photoelectric properties of organic-inorganic hybrid perovskite materials and the flexible design of the device structure when applying solar cells ...

AI Technical Summary

Problems solved by technology

However, the preparation process of the dense layer of titanium dioxide requires high temperature sintering over 500 °C, which greatly affects the selection of substrates, and greatly limits the development of efficient and flexible perovskite solar cells.

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