Method for improving adsorption density of self-assembled monomolecular carrier transport layer

Abstract

The invention relates to a method for improving the adsorption density of a self-assembled monomolecular carrier transport layer, which comprises the following steps of: preparing a NiOx hole transport layer on a clean substrate by using magnetron sputtering coating equipment at normal temperature; and regulating binding sites on the substrate, and due to the fact that the surface of the substrate contains hydroxyl, selecting organic matter containing anchoring groups to react with the substrate with the NiOx hole transport layer on the surface. The method has the beneficial effects that the organic matter containing the anchoring group is selected to react with the substrate with the NiOx hole transport layer on the surface, the proper (molecular weight, symmetry, polarity and the like) organic matter containing the anchoring group is selected by regulating and controlling the binding site of the substrate, and then the content and deposition mode of the anchoring group are regulated, required performances such as high adsorption density and strong polarity are prepared according to the growth direction and the like. Due to the addition of the-OR functional group-containing layer, direct contact between the transparent conductive oxide substrate and the active layer is prevented; the adsorption density of anchoring group-containing organic matters is favorably improved.

Description

technical field [0001] The invention belongs to the field of photovoltaics, and in particular relates to a method for increasing the adsorption density of a self-assembled single-molecule carrier transport layer. Background technique [0002] In recent decades, photovoltaic technologies such as organic light-emitting diodes, photodetectors, dye-sensitized solar cells, quantum dot solar cells, organic solar cells, and perovskite solar cells have developed rapidly. Among them, organic-inorganic hybrid perovskite solar cells have attracted extensive attention due to their advantages such as high light absorption coefficient, long diffusion length, high carrier mobility, low exciton binding energy, and adjustable band gap. The photoelectric conversion efficiency of solar cells has increased from 3.8% to 25.5% in the past ten years. However, with the further improvement of the quality of perovskite crystals, efficient, stable and inexpensive carrier transport materials are cruci...

AI Technical Summary

Problems solved by technology

With the rapid development of photovoltaic technology, the following problems generally exist in the existing transmission layer materials, which greatly limit the further development of photovoltaic technology:

[0008] (1) Traditional organic transport layer materials are expensive, have poor stability, and require complex doping processes

[0009] (2) Traditional inorganic transport materials have interface defects and poor electrical conductivity

[0010] (3) Single-layer adsorption of SAMs transport materials, easy to tunnel or form holes

[0011] Therefore, the development of new transport layer materials is a direct way to solve the above problems, but it is not the fastest way to solve the above problems because the development of new materials takes a long time

[0012] In view of the poor conductivity of traditional inorganic materials, doping is often used to solve the problem

Images