Hybrid solar cell, method for manufacturing same, method for forming hole transport layer

Abstract

The invention provides an organic-inorganic hybrid solar cell, a preparation method thereof, and a hole transport layer forming method. Wherein, the method for forming the hole transport layer of the hybrid solar cell comprises: Step A: Carrying out texture processing to the front side of the silicon substrate to form a pyramid structure interface; Step B: treating the silicon substrate with the pyramid structure interface in hydrofluoric acid Carry out isotropic etching in the mixed solution of nitric acid, to smooth the bottom of the pyramid structure; The annealing treatment forms a p-type hole transport layer. After the present invention carries out low-cost chemical treatment on the bottom of the pyramid structure on the silicon substrate, the bottom becomes smooth and open, basically maintaining the anti-reflection effect of the pyramid, and can also ensure the conformal coverage of the conjugated organic polymer on the pyramid .

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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