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

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 and second trenches arranged in parallel and spaced apart on the upper and lower surfaces of the N-type single crystal silicon wafer such that the ratio of the width of the overlapping portion in the vertical directionof the bottom surface of the first trench and the bottom surface of the corresponding second trench to the width of the bottom surface of the first trench is 0.5-0.8; Forming a silicon nanowire arrayon an upper surface of the N-type single crystal silicon wafer, a bottom surface and a side surface of the first trench; Forming an N-type heavily doped phosphorus diffusion region in each second trench of the lower surface of the N-type monocrystalline silicon wafer; Forming a dense Spiro on the upper surface of the N-type monocrystalline silicon wafer; OMeTAD layer, a composite PEDOT: PSS layerand a front gate electrode; a back electrode is prepared on the lower surface of the N-type monocrystalline silicon wafer.

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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