Preparation method of PERC micro graphic printed monocrystalline solar cell

Abstract

The invention discloses a preparation method of a PERC micro graphic printed monocrystalline solar cell. According to the preparation method, a monocrystalline silicon wafer is used as a base material, and the cell is prepared through steps of texturing, dispersing, etching, annealing, back passivating, antireflecting film plating, laser grooving on back, printing, sintering and reducing light attenuation, wherein the annealing step adopts anaerobic annealing, the back passivating step is to plate Al2O3 and SiNX on the back of the silicon wafer, the antireflecting film plating step is to plateSiNX on the front of the silicon wafer, the positive electrode printing step adopts a silk screen for printing, and the positive electrode printing screen adopts a non-knot micro graphic printing screen . Through adoption of the preparation method of the PERC micro graphic printed monocrystalline solar cell, cell LID can be lowered to around 1%, the power of the component finished product is improved, the conversion efficiency is high, and the grade and electric performance of the cell are improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of solar cell preparation, and in particular relates to a preparation method of PERC micro-pattern printing monocrystalline solar cells. Background technique [0002] With the increasing tension of global energy sources, solar energy has been widely valued by countries all over the world due to its unique advantages such as no pollution and large market space. Solar cell, also known as "solar chip" or "photovoltaic cell", is a device that uses the photovoltaic effect to directly convert solar energy into electrical energy. It mainly includes crystalline silicon cells, semiconductor cells, inorganic cells, organic cells, etc., among which crystalline silicon solar cells Dominant position in the mainstream of the market. [0003] The current mainstream technology of crystalline silicon solar cells is PERC (Passivated Emitter Rear Cell) - emitter and rear passivation cell technology, which improves conversion ...

AI Technical Summary

Problems solved by technology

However, existing PERC cells generally have the problem of light-to-decay (LID), and LID can cause module power to decay by as much as 10% or more.

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