The invention provides a
monocrystalline silicon wafer texturing structure of a
solar cell, a texturing additive, a texturing solution, a texturing method and the
solar cell. The texturing additive comprises 0.01-0.1 wt% of a nucleating agent, 0.03-0.5 wt% of a surface forming agent, 0.06-1 wt% of a
tower surface etching agent, 0.1-1 wt% of a dispersing agent, 5-20 wt% of a defoaming agent and the balance of deionized water. The nucleating agent is
benzene ring-containing
polyoxyethylene ether, the
tower surface etching agent is a vinyl pyrrolidone
copolymer, the nucleating agent forms
hydrogen bonds with Si-OH on the surface of an SDR
silicon wafer by virtue of EO chain segments and
benzene rings, and the
hydrogen bonds are adsorbed on the flat surface of the
silicon wafer to form nucleating points. And after the
pyramid is formed, the nucleating agent at the spire is separated from the spire and loses protection on the spire, the surface forming agent can still protect the surface of the
tower due to relatively strong adsorption, and the spire is slightly corroded, the spire is smooth and the height-
width ratio of the
pyramid is reduced due to continuous
corrosion of alkali liquor. The tower
surface etching agent is subjected to
ester hydrolysis due to alkali and high temperature, so that the water
solubility of the
copolymer is improved; and the tower surface
etching agent is adsorbed on the tower surface by virtue of the
long chain segment of the
copolymer, and is continuously corroded at the tower surface to form a slight gully type tower surface.