A silicon-based organic-inorganic hybrid solar cell and its preparation method

Abstract

The invention relates to a silicon-based organic-inorganic hybrid solar cell and a preparation method thereof. The method comprises the following steps: forming a plurality of first grooves and second grooves arranged in parallel and spaced apart on the upper and lower surfaces of an N-type single crystal silicon wafer. a groove, so that the ratio of the width of the overlapping portion of the bottom surface of the first groove and the bottom surface of the corresponding second groove in the vertical direction to the width of the bottom surface of the first groove is 0.5-0.8; Silicon nanowire arrays are formed on the upper surface of the N-type single crystal silicon wafer, the bottom surface and side surfaces of the first groove; each second groove is formed on the lower surface of the N-type single crystal silicon wafer N-type heavily doped phosphorus diffusion region; form a dense Spiro-OMeTAD layer, a composite PEDOT:PSS layer and front gate electrode on the upper surface of the N-type single crystal silicon wafer; Prepare the back electrode on the lower surface.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a silicon-based organic-inorganic hybrid solar cell and a preparation method thereof. Background technique [0002] Because monocrystalline silicon has the advantages of abundant resources, non-toxicity, and strong light-absorbing ability, it has become the main raw material for commercial solar cell production. The photoelectric conversion efficiency of monocrystalline silicon solar cells is very high, but in its production, it requires high-purity silicon wafers, a high-temperature annealing process of up to 1000 degrees Celsius, an etching process with serious environmental pollution, and other complicated manufacturing processes, resulting in The manufacturing cost of this type of crystalline silicon battery is relatively high, and the manufacturing process also has environmental risks. With the development of the solar cell industry, organic solar cells are expected to ...

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Problems solved by technology

The photoelectric conversion efficiency of monocrystalline silicon solar cells is very high, but in its production, it requires high-purity silicon wafers, a high-temperature annealing process up to 1000 degrees Celsius, an etching process with serious environmental pollution, and other complicated manufacturing processes, resulting in The manufacturing cost of this type of crystalline silicon battery is relatively high, and the manufacturing process also has environmental risks

With the development of the solar cell industry, organic solar cells are expected to reduce their production costs due to their advantages such as cheap materials, low annealing temperature, and simple manufacturing process. However, the efficiency of organic solar cells is much lower than that of monocrystalline silicon cells. With the development of time, organic solar cells still have no significant improvement and cannot replace conventional crystalline silicon solar cells.

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