Organic and inorganic mixed solar battery and manufacturing method and hole-transporting-layer forming method of organic and inorganic mixed solar battery

Abstract

The invention provides an organic and inorganic mixed solar battery and a manufacturing method and a hole-transporting-layer forming method of the organic and inorganic mixed solar battery. The hole-transporting-layer forming method of the organic and inorganic mixed solar battery comprises the following steps that A, texturing is conducted on the front face of a silicon substrate, so that a pyramid structure interface is formed; B, isotropic etching is conducted on the silicon substrate provided with the pyramid structure interface in a hydrofluoric acid and nitric acid mixed solution, so that the bottom of the pyramid structure is smoothened; E, the pyramid structure interface on the front face of the silicon substrate is evenly spin-coated with a conjugated polymer, annealing treatment is conducted on the conjugated polymer, and therefore a p-type hole transporting layer is formed. After low-cost chemical treatment is conducted on the bottom of the pyramid structure of the silicon substrate, the bottom becomes smooth and wide, the antireflection effect of a pyramid is kept basically, and conformal coverage conducted on the pyramid by the conjugated organic polymer can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of clean energy, in particular to an organic-inorganic hybrid solar cell, a preparation method thereof, and a method for forming a hole transport layer. Background technique [0002] In recent years, with the gradual depletion of non-renewable energy, the development and utilization of clean energy has attracted widespread attention. Among them, solar cells have become the green energy with the most application potential and application value in the 21st century to deal with energy depletion due to its non-pollution, abundant sources and many other advantages. [0003] Silicon-based solar cells dominate the field of clean energy due to their high conversion efficiency, abundant material sources, non-toxicity, and long-term stability. However, due to the need to use complex high-temperature and high-vacuum production processes (such as diffusion junctions, electrode sintering, anti-reflective passivation coa...

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Problems solved by technology

Since the bottom of the pyramid structure interface is relatively sharp and the gap is small, there are generally problems that PEDOT:PSS cannot cover the bottom and the contact is not good, such as figure 2 As shown, these problems are reflected in references 1 and 2

Although the increase of spin coating rate can improve this situation, but the larger spin coating rate will reduce the film thickness of the polymer and deteriorate the electrical properties of the polymer film.

In addition, some researchers have tried to coat a thin layer of small molecular polymers first, and then spin-coat macromolecular conjugated organic polymers to increase the coverage of the polymers, which not only adds new possibilities to the hybrid solar cell structure. Interface problems, and the process steps are more complicated and the cost is higher

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